REVIEW NAUČNIH I STRUČNIH rezultata 2016.pdf · REVIEW OF RESEARCH AND BUSINESS RESULTS OF THE...

REVIEW

OF RESEARCH

AND BUSINESS RESULTS

OF THE IMS INSTITUTE

IN 2016

PREGLED

NAUČNIH I STRUČNIH

REZULTATA

INSTITUTA IMS

U 2016. GODINI

Institut za ispitivanje materijala a.d.

Beograd, decembar 2016.

PREGLED NAUČNIH I STRUČNIH REZULTATA

INSTITUTA IMS U 2016. GODINI

REVIEW OF RESEARCH AND BUSINESS RESULTS

OF THE IMS INSTITUTE IN 2016

Izdavač

Institut IMS a.d.

Beograd, Bulevar vojvode Mišića 43

[email protected]

www.institutims.rs

Za izdavača

Dr Vencislav Grabulov

Urednici


Dr Aleksandra Mitrović

Goran Petrović

Štampa

Razvojno-istraživački centar grafičkog inženjerstva

Tehnološko-metalurški fakultet, Beograd, Karnegijeva 4

Tiraž

250 primeraka

ISBN 978-86-82081-26-5

Institut za ispitivanje materijala ima iza sebe još jednu uspešnu godinu, u kojoj

je realizovan veliki broj poslova u oblastima kojima se Institut bavi. Ovde

prikazane odabrane stručne reference su, verujemo, impresivne. Institut IMS je

i ove godine učestvovao u najznačajnijim projektima u zemlji i regionu. U

skladu sa višedecenijskom tradicijom i ugledom, kao i širokim spektrom usluga

koje pružamo, bili smo angažovani na kontroli i nadzoru, projektovanju,

ispitivanjima i istraživanjima građevinskih i mašinskih objekata i konstrukcija,

materijala i proizvoda, kao i primeni sopstvenih tehnologija i sistema.

Kao najznačajnije izdvajamo aktivnosti na koridorima X i XI i značajno učešće

u sanaciji brojnih klizišta. Nastavili smo rad na zaštiti graditeljskog nasleđa,

obnovi i izgradnji putnih objekata duž autoputeva i magistralnih i regionalnih

puteva u Srbiji, na revitalizaciji HE Đerdap 1 u Kostolcu i na drugim hidro i

termo-elektranama, kao i u oblasti ispitivanja metalnih materijala razaranjem.

Što se naučno istraživačkog rada tiče, postignuti su rezultati na koje je Institut

IMS već navikao. Značajno je učešće naših saradnika na realizaciji sedam

projekata tehnološkog razvoja, jedog projekta integralnih i interdisciplinarnih

istraživanja i četiri projekta iz programa osnovnih istraživanja.

Tokom 2016. godine, nastavljen je rad baziran na usvojenom Programu

naučnoistraživačkog rada i Programu razvoja naučnoistraživačkog podmlatka

za period 2015-2019. godine, kojima je definisano strateško opredeljenje

rukovodstva Instituta ka daljem razvoju naučno-istraživačke i inovacione

delatnosti, kao i primeni rezultata istraživanja uz poštovanje principa

multidisciplinarnosti koja odlikuje Institut IMS, kao i usmerena kadrovska

politika. Ovu godinu posebno korakterišu napori istraživača da se proširi

međunarodna saradnja kroz učešće na projektima Horizon 2020, COST i IPA.

Naučni kadar je značajno poboljšan, pre svega kroz opredeljenje mladih

istraživača za dalje naučno usavršavanje koje se reflektovalo na povećan broj

istraživača sa istraživačkim zvanjima. Rezultati istraživačkog rada su u skladu

sa dosadašnjim trendom rasta broja publikacija u međunarodnim časopisima i

učešća istraživača na vodećim međunarodnim skupovima.

Urednici

Pregled naučnih i stručnih rezultata u 2016. godini 1

SADRŽAJ

REZULTATI NAUČNO-ISTRAŽIVAČKOG RADA .................................. 3

T 152 KOMPOZITNI MATERIJALI ............................................................... 5

Monografska studija međunarodnog značaja (M14) ........................................... 6

Rad u međunarodnom časopisu (M23).............................................................. 11

Saopštenje sa međunarodnog skupa štampano u celini (M33) .......................... 12

Saopštenje sa međunarodnog skupa štampano u izvodu (M34) ........................ 18

Saopštenje sa skupa nacionalnog značaja štampano u celini (M63) ................. 22

T 220 GRAĐEVINARSTVO, HIDRAULIKA, PRIOBALNA

TEHNOLOGIJA, MEHANIKA TLA ............................................................... 25


Rad u časopisu međunarodnog značaja (M24) .................................................. 27

Predavanje po pozivu sa međunarodnog skupa štampano u celini (M31)......... 28


T 230 VISOKA GRADNJA ............................................................................. 35

Monografija međunarodnog značaja (M12) ...................................................... 36


T450 TEHNOLOGIJA METALA, METALURGIJA, PROIZVODI OD

METALA .......................................................................................................... 39

Monografska studija međunarodnog značaja (M13) ......................................... 40

Rad u istaknutom međunarodnom časopisu (M22) ........................................... 42

Rad u časopisu međunarodnog značaja (M24) .................................................. 43

Predavanje po pozivu sa međunarodnog skupa štampano u celini (M31)........ 46

Istaknuta monografija nacionalnog značaja (M41) ........................................... 47

2 Institut za ispitivanje materijala a.d. Beograd

Rad u vodećem časopisu nacionalnog značaja (M51) ....................................... 48


T 150 PETROLOGIJA, MINERALOGIJA, GEOHEMIJA ........................... 55

Rad u istaknutom međunarodnom časopisu (M22) ........................................... 56




B 003 EKOLOGIJA ......................................................................................... 63


Rad u vodećem časopisu nacionalnog značaja (M51) ....................................... 65


DOKTORSKE DISERTACIJE ......................................................................... 69

ORGANIZACIJA STRUČNIH SKUPOVA .................................................... 73

NAUČNI PROJEKTI FINANSIRANI OD STRANE MINISTARSTVA

PROSVETE, NAUKE I TEHNOLOŠKOG RAZVOJA .................................. 77

NAGRADE I PRIZNANJA .............................................................................. 81

ODABRANE STRUČNE REFERENCE ..................................................... 85

CENTAR ZA MATERIJALE .......................................................................... 87

CENTAR ZA METALE I ENERGETIKU ..................................................... 91

CENTAR ZA PUTEVE I GEOTEHNIKU ..................................................... 97

CENTAR ZA KONSTRUKCIJE I PREDNAPREZANJE ............................ 105

SERTIFIKACIONO TELO ............................................................................. 115


RESULTS

OF SCIENTIFIC RESEARCH

WORK

REZULTATI

NAUČNO-ISTRAŽIVAČKOG

RADA


T 152

COMPOSITE

MATERIALS

T 152

KOMPOZITNI

MATERIJALI


MONOGRAFSKA STUDIJA

MEĐUNARODNOG ZNAČAJA (M14)

A. Terzić, V. Mitić, Lj. Kocić, Z. Radojević, S. Pašalić

NOVEL APPLICATION OF FRACTAL ANALYSIS IN REFRACTORY

COMPOSITE MICROSTURCTURAL CHARACTERIZATION

Mechanical Properties and Performance of Engineering Ceramics and

Composites X, Vol. 36, Iss. 2, John Wiley & Sons, Inc., Hoboken, New Jersey,

USA, 2016, 73-86.

Fractal geometry theory implied in a composite surface topographic analysis as

a means of explanation of the structural characteristics has hardly been reported

so far. This paper proposes a new method of roughness peaks curvature radii

calculation and its application to the refractory composite surface tribological

analysis. Fractal geometry method is introduced via calculation of asperity

radius, by introducing a fractal concept of curvature radii of surfaces, depending

on the observation scale and also numerically depending on horizontal lines

intercepted by the investigated profile. The dependence of the calculated radii

on the fractal geometry of the studied curves was established and the notion of

peak was mathematically formulated. The efficiency of the method was tested

by simulations of fractal curves described by Brownian motions.

Microstructural investigations were carried out using a scanning electron

microscope. The correlation between microstructure and properties of the

investigated refractory composite, based on fractal geometry and contact surface

probability, has been developed. Using the fractals of the contact surfaces of

grains, a reconstruction of microstructure configuration, as grain shapes or

inter-granular contacts, has been successfully performed. Obtained results

indicated that fractal analysis of contact surfaces of different shapes was very

important for the prognosis of refractory composite properties and behavior.

The morphology of composite grains and surfaces highlighted the validity of

developing new structure analytical methods based on different grain shape

geometries. The novel approach to the investigation of refractory composite

characteristics was successfully conducted, as a result introducing fractal

identification as a means of evaluating and predicting material performances.

Keywords: composite, fractal geometry, refractory materials, ceramics.


Lj. Andrić, A. Terzić, S. Pašalić, M. Petrov, D. Radulović

THE EFFECTS OF THE PHOSPHATES’ MECHANICAL

ACTIVATION

III Advanced Ceramics and Applications Conference, Vol. XIX,

Springer/Atlantis Press, USA, 2016, 339-351.

The investigation was conducted with an aim to increase the reactivity of the

comminuted phosphate ore and to establish the optimal mechanical activation

period of the grain mixture. In order to obtain complete insight into the process

and phenomena of the phosphate grain mixture activation, a good understanding

of the theoretical principles of the activation operation is necessary. In the

experiments, the vibratory and planetary mills were used as activators. The

obtained results pointed out that both amorphous and crystallized forms

appeared within the Lisina ore deposit mixture due to the specific genetic

conditions which rarely occur in the deposits. Such a heterogenic composition

of the useful phosphoric part of the ore gave a variety of the results during the

leaching. For the first time, the experiments of phosphate (apatite) mechano-

chemical activation from Lisina ore deposit were performed in order to improve

its reactivity.

Keywords: mechanical activation; planetary mill; vibratory mill; reactivity;

crystal structure; apatite.


RAD U VRHUNSKOM MEĐUNARODNOM

ČASOPISU (M21)

A. Terzić, L. Pezo, Lj. Andrić

CHEMOMETRIC ASSESSMENT OF MECHANO-CHEMICALLY

ACTIVATED ZEOLITES FOR APPLICATION IN THE

CONSTRUCTION COMPOSITES

Composites Part B: Engineering, 2016.

DOI: 10.1016/j.compositesb.2016.10.040

Natural zeolites of clinoptilolite type from seven deposits were submitted to

mechano-chemical activation in a Retsch ultra-centrifugal mill. The zeolite

types and activation parameters were altered during the experiment with an aim

to determine the optimal combination that would produce powder with adequate

physico-chemical and microstructural properties for application as a binder

replacement and an ion-exchanger in the construction composites. The effects

of input variables (chemical composition of the samples) and process

parameters (the rotor velocity and the activation period) on the efficiency of

zeolite activation were investigated in terms of dependent parameters such as:

specific surface area, grain size distribution, cation exchange capacity, melting

point, compression strength, shrinking, water absorption and apparent porosity.

Cluster analysis, Principal component analysis and Standard score analysis were

applied in the assessment of the acquired product quality. Artificial neural

networks (ANN) were developed in mathematical modeling of observed

responses. Subsequently the ANN was compared to experimental results and the

developed second order polynomial models. Developed models showed r2

values in the 0.822-0.998 range, meaning that they were able to predict the

observed responses in a wide range of processing parameters. ANN models

performed high prediction accuracy (0.975–0.993) and can be considered as

precise and very useful for response variables prediction. The combination of

the conducted mathematical analyses isolated Z5 zeolite as a preferable type,

and 20000 rpm and 30 min as an optimal activation set of parameters.

Mathematically derived conclusions were confirmed by results of instrumental

analyses (XRD, DTA/TG, SEM).


Keywords: mechanical properties; analytical modeling; thermal analysis;

powder processing; construction materials.

B. Ilić, V. Radonjanin, M. Malešev, M. Zdujić, A. Mitrović

EFFECTS OF MECHANICAL AND THERMAL ACTIVATION ON

POZZOLANIC ACTIVITY OF KAOLIN CONTAINING MICA

Applied Clay Science, 123, 2016, 173-181.

Kaolin from a Serbian deposit, characterized by high content of impurities, such

as mica and quartz, disordered kaolinite and high specific surface area, was

subjected to thermal and mechanical activation on a large scale. Activations

were carried out with a goal to investigate the effects of applied methods on the

chemical, structural and morphological changes that occurred in the kaolin, and

their influence on the pozzolanic activity. The changes were monitored using

XRD, FTIR, TG/DTA, PSD, BET and SEM analyses. Pozzolanic activity was

evaluated by determination of the 7-day compressive strength conducted on the

lime mortars.

The results showed that mechanical activation by milling the kaolin for 20 h in

the conventional horizontal ball mill was competitive for obtaining pozzolana as

thermal activation. Pozzolanic activity of thermally activated kaolin was mainly

influenced by formation of metakaolin. Combined effects (such as significant

specific surface area increase, as well as partial kaolinite and complete mica

phase amorphization) were dominant in pozzolanic activity of mechanically

activated kaolin.

Keywords: thermal activation, mechanical activation, kaolin, pozzolanic

activity.

K. Janković, S. Stanković, D. Bojović, M. Stojanović, L. Antić

THE INFLUENCE OF NANO-SILICA AND BARITE AGGREGATE ON

PROPERTIES OF ULTRA HIGH PERFORMANCE CONCRETE

Construction and Building Materials, Vol. 126, 2016, 147-156.

The development of building materials with improved characteristics and their

application for increasing structure durability and sustainability is one of the


goals in construction sector. The main objective of this paper is to evaluate the

influence of nano-silica replacement of cement (2% or 5%) and aggregate type

(quartz, barite or its combination 50:50 by volume) on the properties of ultra

high performance concrete (UHPC). UHPC with nano-silica and combination of

barite and quartz aggregate is composite which has finer pore-size distribution,

improvement in compressive and flexural strength and in radiation protection

characteristics, with potential usage as building material for hospitals and

nuclear facilities.

Keywords: nano-silica, UHPC, barite, radiation protection.


RAD U MEĐUNARODNOM ČASOPISU (M23)

K. Janković, Lj. Lončar, D. Bojović, M. Stojanović

DURABILITY OF CONCRETE WITH DIFFERENT TYPES OF

CEMENT

Romanian Journal of Materials, Vol. 46, No. 2, 2016, 215-221.

Adequate measures must be taken during the determination of the concrete

composition for ensuring the durability of concrete exposed to an aggressive

environment. The influence of the cement type on the freeze/thaw resistance

with and without de-icing salt of concrete was tested. Samples were made using

five types of cement. All types of concrete made according to the

recommendations of the Serbian and European norms had the required frost

resistance. Besides the respected recommendations, concrete made using

cement with 35% mineral additions of fly ash and lime was not freeze/thaw

resistant with de-icing salt.

Weathering resistance for paving units is determined according to EN 1338 and

EN 1339 for freeze/thaw resistance with de-icing salt or water absorption.

Taking into account previous investigations, only samples which were made in

accordance with the recommendations of the Serbian Building code

requirements for concrete and reinforced concrete - BAB 87 and European

norms EN 206-1 were tested. Regarding water absorption, it is expected that in

the case of established production all types of concrete would be integrated into

class 2 according to EN.

Also, for two representative types of concrete with different air content and

degree of damage done by destructive test, non-destructive test by device

RapidAir 457 was done.

Keywords: specific surface, spacing factor, void frequency and average chord

length.


SAOPŠTENJE SA MEĐUNARODNOG SKUPA

ŠTAMPANO U CELINI (M33)

E. Nikolić, A. Radivojević, I. Delić-Nikolić, D. Rogić

ROMAN MORTARS FROM THE AMPHITHEATRE OF VIMINACIUM

4th Historic Mortars Conference - HMC 2016, Santorini, Greece, 2016, 137-

144.

Although the first archaeological excavations of Viminacium, the capital of the

Roman province Moesia Superior, today's Serbia, began in 1882, only a small

amount of laboratory research on applied building materials has been conducted

so far. The grandeur and uniqueness of the building of the Roman amphitheatre

now being excavated, and the need for its conservation, required the start of the

research on the lime mortars used in this building. Some of the results of this

particular research are presented in this paper.

I. Despotović , K. Janković

CONCRETE SHRINKAGE MECHANISM AND EXAMPLES OF

CONCRETES WITH DIFFERENT RECYCLED AGGREGATES

International Scientific Conference VSU 2016, Sofia, Bulgaria, 2016, 399-404.

Concrete shrinkage is reduction of its volume which is caused by hydration of

cement and loss of moisture, independently of the external load. Aggregate can

be considered inert in terms of volume changes, so concrete shrinkage is related

only to cement paste shrinkage. Extent of shrinkage depends on the quantity and

type of cement, water-cement factor, granulometric composition, type of the

aggregate, strength of concrete, thermo-hygrometric conditions of the

environment, wind velocity, etc. The paper presents two examples: the results

of shrinkage of self-compacting concrete with recycled aggregate of crushed

concrete and the results of shrinkage of vibrated concrete with recycled brick

Keywords: concrete, shrinkage, self-compacting concrete, recycled concrete

aggregate, recycled brick.


K. Janković, D. Bojović, M. Stojanović , Lj. Lončar, L. Antić

CONCRETE DURABILITY WITH BOTTOM ASH AS PARTIAL

REPLACEMENT OF FINE AGGREGATE

International Conference Civil Engineering – Science and Practice, Žabljak,

Montenegro, 2016, 715-720.

In order to evaluate the quality of the bottom ash and to determine the

possibility of its application in composite materials, a detailed testing of the

chemical, physical and mechanical properties of the samples from the silo

TENT B was initially conducted. Then, in order to investigate the application of

bottom ash in concrete, samples with a part of the fine fraction of aggregates 0/4

replaced with 4%, 8%, 12% and 16% bottom ash were made and the properties

of fresh and hardened concrete were tested. The obtained results met the criteria

of the valid regulations for concrete from the viewpoint of durability, which

justifies the use of bottom ash for exposure classes XF.

Keywords: Bottom ash, concrete, exposure classes XF.


INFLUENCE OF FREEZING AND THAWING ON THE STRUCTURE

OF CONCRETE

Symposium of the Association of Structural Engineers of Serbia DGKS 2016,

Zlatibor, 2016, 1061-1068.

During the exploitation, concretes exposed to frost and/or frost and de-icing

salts must be resistant. Samples were made and tested and they met all the

requirements and recommendations for concrete resistance. Special emphasis

was put on the durability of concrete, therefore the samples were tested on M-

250 and at 1200 cycles of freezing and thawing, that is, to be found out if during

a longer time period there were changes in the concrete structure. Tests were

carried out using the standard destructive, as well as non-destructive method.

After more than a year there was no change in the structure of concrete.

Keywords: freezing and thawing, pores, RapidAir 457.



RELATION OF DESTRUCTIVE AND NON- DESTRUCTIVE TESTING

OF CONCRETE WITH NANOSILICA


Zlatibor, 2016, 1069-1074.

The subject of this research are concretes with and without partial replacement

of the required amount of cement with the particles of nano-silica, as well as the

interdependence of the results of their tests by using destructive and non-

destructive methods. The ultrasonic pulse velocity and the rebound number was

determined on the samples of concrete with 0%, 1%, 2% and 3% addition of

nano-silica, and then compressive strength was tested. The interdependence of

the measured values obtained in these trials was established.

Keywords: nano-silica, compressive strength, ultrasonic pulse velocity, the

rebound number.


THE EFFECT OF FIBER AND AGGREGATE TYPE ON

MECHANICAL PROPERTIES OF UHPC


Montenegro, 2016, 709-714.

The main objective of this paper is to evaluate the influence of different

aggregates and content of fiber on the mechanical properties of ultra high

performance concrete (UHPC). Two types of aggregate were used: quartz and

barite. As a heavy-weight aggregate barite increased concrete density.

Increasing the amount of fiber from 3% to 5% had positive effect on concrete

strength. The greatest impact, almost 50% was noticed on flexural strength of

UHPC with quartz aggregate.

Keywords: Aggregate, UHPC, mechanical properties.



THE INFLUENCE OF NANO-SILICA ON COMPRESSIVE STRENGTH

OF CONCRETE

International Scientific Conference State and Trends of Civil and

Environmental Engineering – EGTZ 2016 , Tuzla, BiH, 2016, 165-170.

In an effort to preserve the environment, but also with the aim to produce

concrete with improved characteristics, continual innovations are being done in

terms of materials used in the construction industry. Cement production

increases environmental pollution, so there is a tendency of applying other

materials in order to reduce the cement content in concrete mixtures. One of

these additives is ultra-fine powder, which is obtained as a by-product in the

production of silicon, nanosilica. The aim of the research is to determine the

impact of nanosilica as a partial replacement for cement on the compressive

strength of concrete. The results of comparative tests of concrete with and

without the addition of 1,2,3% nanosilica in fresh and hardened state are shown.

To determine the impact of nanosilica on the increase in compressive strength,

testing of samples at the age of 1, 2, 3, 7 and 28 days was performed.

Keywords: nanosilica, concrete, compressive strength.

K. Janković, M. Stojanović , D. Bojović, Lj. Lončar, L. Antić

THE INFLUENCE OF NANOSILICA ON MECHANICAL

PROPERTIES OF HIGH STRENGTH CONCRETE

International Conference Contemporary Achievements in Civil Engineering,

Subotica, 2016, 391-396.

A large number of studies throughout the world deals with producing material

which has a significantly improved properties compared to conventional

materials. The application of nanosilica is one of the possibilities for obtaining

high strength concrete. This paper shows the influence of nanosilica and steel

fibers on the mechanical properties of concrete. The results of testing concrete

without and with the addition of 2% of nanosilica and with the addition of 0, 2

and 4% of steel fibers, with non-destructive and destructive methods, were

compared.

Keywords: high strength concrete, nanosilica, steel fibers.


K. Janković, S. Stanković, M. Stojanović , D. Bojović, L. Antić

EFFECT OF NANO-SILICA AND AGGREGATE TYPE ON

PROPERTIES OF ULTRA HIGH PERFORMANCE CONCRETE

International Conference Environment, efficiency and economic challenges for

concrete, Dundee, Scotland, 2016, 839-846.

The aim of this investigation is to develop ultra high performance concrete

(UHPC) for multipurpose - higher mechanical and ionizing radiation protection.

The effect of nano-silica replacement (2 or 5%) on the properties of UHPC was

compared with the referent concrete by testing compressive and flexural

strength. As nano-silica influences cement hydration and modifies the pore

structure, qualitative and quantitative analysis of pores was done using a device

RapidAir 457. The second objective of this paper is to evaluate the influence of

different aggregates on concrete properties. Two types of aggregate were used:

quartz and barite. One of the most important characteristics of the concrete for

protection against gamma and X radiation is its Total Attenuation Coefficient

(µ/ρ)tot.

Keywords: nano-silica, UHPC, barite, radiation protection.

K. Janković, S. Stanković, M. Stojanović , D. Bojović, L. Antić

PROPERTIES OF RECYCLED AGGREGATE CONCRETE AFTER 16

YEARS OF EXPOSURE TO REAL CONTINENTAL CONDITIONS

International Conference Environment, efficiency and economic challenges for

concrete, Dundee, Scotland 2016, 956-963.

It has been observed from the literature that the recycled aggregate concrete

(RAC) shows better freeze-thaw resistance than the conventional concrete

because recycled aggregate is more porous. Laboratory tests have shown that air

entrained concrete made up of crushed bricks as aggregate has very good frost

resistance. In this paper compressive and flexural strength after 16 years under

real continental conditions were tested. Concrete exposed to freezing changes

its characteristics both in terms of strength and in terms of the structure. The

aim of this study is to determine how to modify the structure of the concrete

after real cold climate conditions. Changing the structure of concrete was


evaluated by qualitative and quantitative analysis of pores using a device

RapidAir 457.

Keywords: recycled aggregate concrete, durability, pores, RapidAir 457.

M. Vasić, Z.Radojević

SETTING UP THE DRYING REGIMES BASED ON THE THEORY OF

MOISTURE MIGRATION DURING DRYING

International Conference on Modern Technologies in Industrial Engineering

ModTech 2016, Iasi, Romania, 2016, published as IOP Conf. Series: Materials

Science and Engineering 145, 2016, 032012.

DOI:10.1088/1757-899X/145/3/032012.

Drying is energy intensive process which has important effect on the quality of

the clay tiles that are dried commercially. Chamber and tunnel dryers are

constantly improving. Better technical equipment and operational strategies

have lead to higher quality of the dried clay products. The moisture migration

during isothermal drying process can be visually traced on the curve that

represents the relationship between variable effective moisture diffusivity (MR)

with time (t). Proposed non isothermal drying regimes were consisted from

several isothermal segments. For the first time, the choice of isothermal

segments specification and its duration was not specified by experience or by

trial-and-error method. It was detected from the isothermal curves Deff – MR in

accordance with the theory of moisture migration during drying. Proposed

drying regimes were tested. Clay roofing tiles were dried without cracks. Dried

clay roofing tiles has satisfied all requirements defined in EN 1304 norm related

to the shape regularity and mechanical properties

Keywords: drying regime, effective diffusion coefficient, clay tile.



ŠTAMPANO U IZVODU (M34)

A. Terzić, L. Pezo, Lj. Andrić, Lj. Miličić, Z. Radojević

INFLUENCE OF ALTERNATIONS IN ULTRA-CENTRIFUGAL

MILLING PARAMETERS ON THE COAL ASH QUALITY FOR THE

CONSTRUCTION COMPOSITES DESIGN

Advanced Ceramic and Application V – New frontiers in multifunctional

material science and processing, Belgrade, Serbia, 2016, 55.

The coal ash mechano-chemical treatment conducted by means of the high

energy mill was optimized using mathematical and statistical tools. The merits

of the alternations in ash processing schemes with a referral regarding the

improvement of its reactivity were highlighted. This will eventually lead to

higher volume utilization of the fly ash as a cement replacement in concrete

design. In order to obtain the most favorable output, the impact of the sets of

processing parameters (number of rotor revolutions, current intensity, activation

period, circumferential rotor speed, mill capacity) on the on the product’s

quality factors (grain size distribution, average grain size, micronization level,

agglomeration tendency, specific surface area) was assessed via Response

surface method, Standard score analysis and Principal component analysis.

Quality parameters in an extensive range of processing parameters were

accurately predicted with developed models. The calculated r2 values were in

the range of 0.84-0.99. The optimal ash sample, characterized by 0.93 Standard

Score, was produced using a set of processing parameters appropriate to

experimental sequence with applied 120 μm sieve mesh. The microstructural

characteristics were assessed using image-processing values and histogram

plots of the activated fly ash SEM images. Multiple comparison tests revealed

that the optimal variations in the activation parameters could improve the

technology of cement replacement material production and its transfer into an

economically attractive sustainable solution which is a new step in the design of

high-volume fly ash based composites.

Keywords: mechano-chemical activation; electron microscopy; structural

applications; construction composites; analytical modeling.


A. Terzić, Lj. Andrić, Z. Radojević, D. Radulović, Lj, Miličić, N. Mijatović

CHARACTERIZATION OF MICROSTRUCTURAL AND THERMAL

PROPERTIES OF THE STEATITE POWDERS APPLIED AS FILLERS

IN THE CERAMIC COATINGS



Steatite is a magnesium silicate multi-componential composite that can be

synthesized from natural raw materials, and eventually produced via standard

ceramic processing methods and readily machined or sintered into a variety of

forms. Due to its excellent electrical properties, high mechanical resistance, low

dielectric loss and high temperature resistance, steatite is widely utilized as a

material for thermal insulation and heath protection. The raw materials used in

steatite powder synthesis are: talc mixture for calcination, clay minerals as

bonding agent, and feldspar or BaCO3 as melting agents. The synthesis is

usually conducted at approximately 1400°C, and its product is a crystalline

phase of magnesium metasilicate (MgSiO3) obtained from talc, while melting

agent forms a vitreous phase which melts and surrounds the crystalline phase.

Steatite ceramics’ fillers were fabricated via combined method of high-energy

ball milling, cold pressing and sintering. The powder blends containing same

amounts of components in all 4 mixtures were dry-pulverized for 30 min a

laboratory mill, with ceramic vial and ceramic balls. After milling, the powders

were compacted to cylindrical tablets with a diameter of 25 mm by uniaxial

compression at 4 tons/cm2. The green compacts were sintered at 1000-

microstructural and thermal properties of the sintered tablets were carried out by

using X-ray diffraction technique (XRD), thermogravimetry/differential thermal

analyzer (TG/DTA) and scanning electron microscope (SEM). The effects of

grinding on the change of the particle diameter, crystallinity and the phase

transformations, and reactivity of the powders were studied. The powders that

were pulverized for 30 min showed properties which positively influenced on

the decrease of sintering temperature and the increase of the sintering rate of

steatite fillers.

Keywords: thermal protection; refractoriness; sintering; ceramics; milling;

structural applications; construction composites.


D. Radulović, A. Terzić, Lj. Andrić, M. Petrov

EFFECTS OF SA SURFACE TREATMENT ON THE PROPERTIES OF

CACO3 USED AS FILLER IN CONSTRUCTION COMPOSITES



Calcium carbonate (CaCO3) is mineral filler that has been most extensively

used in the construction composites as well as in the polymer industry. Coarse

CaCO3 grains can be easily incorporated into the composite material, but the

smaller-sized particles tend to agglomerate due to the enhanced particle-to-

particle interactions, which leads to serious performance problems. The most

efficient way of surpassing this problem is to enhance the final composite

properties by surface treatment of the filler with a surfactant. Following such

procedure a water-repellent construction composites are obtained (i.e. reparation

mortars, mortars for the exterior works, thin coatings for concrete walls, etc.).

The stearic acid is a universal and economical surfactant which is often used to

improve CaCO3 hydrophobic properties. This study investigates and

subsequently compares the surface and mechanical properties of untreated

ground calcium carbonate powder and treated powder with stearic acid using a

dry process coating system. The CaCO3 powder (grain size class: -200 + 63

µm) was pulverized in a laboratory Retsch-ZM-1 mill with a 250 µm mesh size

sieve and a peripheral comminuting path. The surface of CaCO3 powder is

generally hydrophilic, but it was changed to a hydrophobic surface when coated

with SA. The coating procedure was conducted in following manner: 1% of SA

was added to the CaCO3 powder which was previously thermally treated at

rpm. The surface treatment decreases the intensity of particle-to-particle

interaction and increase adhesion of filler. There has been extensive research

reporting about the effects of stearic acid surface treatment on the physical

properties and thermal behavior as well as mechanical properties of CaCO3

composites. The contact angle of water on the coated calcium carbonate powder

surface and hydrophobicity are increased with increasing concentration of SA.

As a result, thermal stability and mechanical properties of the composite were

increased compared to untreated CaCO3 composites. The influence of surface

treatment of the particles, with and without stearic acid on the mechanical,

thermal and structural properties was studied. The experiments included

mechanical and physical testing; differential thermal analysis, scanning electron


microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared

spectroscopy. The composite systems containing coated CaCO3 were found to

exhibit better mechanical properties as compared to composite systems

containing uncoated CaCO3.

Keywords: construction composites, structural applications; physic-mechanical

properties, scanning electron microscopy, hydrofobization.


SAOPŠTENJE SA SKUPA NACIONALNOG

ZNAČAJA ŠTAMPANO U CELINI (M63)

D. Milinković, Lj. Miličić, R. Milićević

UPOTREBA CEMENTA I MATERIJALA NA BAZI CEMENTA ZA

STABILIZACIJU TLA – ZAHTEVI KVALITETA

II srpski kongres o putevima, Beograd, Srbija, 2016, 40-51.

U radu je dat kratki pregled zahteva kvaliteta za sastojke i sastav mineralnih

mešavina vezanih cementom (SRPS EN 14227-1) i hidrauličnim vezivom za

puteve (SRPS EN 14227-5), koje se koriste prilikom izgradnje i održavanja

puteva, aerodroma i drugih saobraćajnih površina, kao i pregled njihove

klasifikacije na osnovu laboratorijskih mehaničkih performansi. Takođe, radom

je obuhvaćena specifikacija za tla koja su stabilizovana cementom i

hidrauličnim vezivom za puteve (SRPS EN 14227-15), sa akcentom na zahteve

kvaliteta sveže mešavine i klasifikaciju mešavina na osnovu laboratorijskih

mehaničkih performansi.

Ključne reči: stabilizacija tla, mešavine vezane hidrauličkim vezivom, cement,

hidraulično vezivo za puteve.

I. Delić-Nikolić, O. Vušović, L. Kurešević

PRILOG ISTRAŽIVANJU I ISPITIVANJU ISTORIJSKIH MALTERA –

ISPITIVANJE MALTERA SA OBREDNOG JEVREJSKOG KUPATILA

MIKVE U PIROTU

Savremeni materijali i konstrukcije sa regulativom, Beograd, 2016, 61-67.

Obredno jevrejsko kupatilo Mikve u Pirotu prema trenutnim procenama datira

iz 19. veka, mada postoji mogućnost da je i starije. Nalazi se u centru grada, u

nekadašnjoj jevrejskoj mahali, današnjoj Jevrejskoj ulici. Na ovom objektu,

godinama zaboravljenom i zapuštenom, već izvesno vreme obavljaju se

konzervatorsko-restauratorski radovi. U sklopu istraživanja koja sprovodi

Zavod za zaštitu spomenika kulture iz Niša, izvršeno je ispitivanje uzoraka

maltera sa spoljašnjeg i unutrašnjeg zida mikve. Cilj sprovedenih ispitivanja,

koja su uključila optičku mikroskopiju i ispitivanje hemijskog sastava, bilo je


definisanje sastava i recepture originalnog maltera. U radu su prikazani rezultati

ispitivanja i izvedeni zaključci.

Ključne reči: Historical mortar, Jewish bath, mikve.

M. Vasić, Z. Radojević, A. Terzić, Z. Bačkalić

PRIKAZ TEHNIČKE REGULATIVE ZA PROIZVODE OD GLINE


U radu je dat prikaz tehničke regulative za proizvode od gline koji se stavljaju u

promet na domaćem tržištu i na tržištu EU. U Srbiji su važeća tri pravilnika o

tehničkim i drugim zahtevima: za crepove od gline, betonski crep i sinterovane

keramičke krovne ploče; za opekarske proizvode od gline i krečnosilikatne

opeke i blokove; za fasadne pune i šuplje opeke i blokove od gline i fasadne

krečnosilikatne pune i šuplje opeke i blokove. Pravilnici se pozivaju na seriju

SRPS (JUS) standarda koji propisuju tehničke zahteve za proizvode kao i

metode njihovog ispitivanja. U poslednjih par godina u našoj zemlji su usvojeni

gotovo svi harmonizovani evropski standardi za proizvode od gline, uz

istovremeno povlačenje gore pomenutih SRPS (JUS) standarda. Proizvodi od

gline koji se plasiraju na tržište EU, moraju biti usaglašeni i deklarisani

saglasno Uredbi br. 305/2011. Evropske harmonizovane tehničke specifikacije

EN 771-1 i EN 1304 utvrđuju karakteristike i zahteve za performansama koje

elemenati za zidanje i crepovi od gline treba da poseduju. Navedeni standardi se

pozivaju na set EN standarda koji definišu metode njihovog ispitivanja.

Evropska harmonizovana specifikacija EN 15037-3 pored toga što utvrđuje

karakteristike i zahteve za performansama koje blokovi od gline za međuspratne

konstrukcije treba da ispune definiše i metode njihovog ispitivanja.

Ključne reči: crepovi, opeke, blokovi, tehnička regulativa, harmonizovani

standardi.


M. Vasić, Z.Radojević

PRIKAZ PROMENA NASTALIH U NAJNOVIJEM IZDANJU

STANDARDA EN 771-1

Šesti internacionalni naučno-stručni skup Građevinarstvo – nauka i praksa,

Žabljak, Crna Gora, 2016, 923-930.

Uredbom br. 305/2011 reguliše se oblast usaglašenosti plasmana građevinskih

konstrukcionih materijala na teritoriji zemalja članica EU. U proteklom periodu,

doneti su harmonizovani evropski standardi za većinu građevinskih proizvoda,

obezbeđen je visok stepen ujednačenosti kvaliteta proizvoda i predviđeni su

različiti nivoi odnosno klase perfomansi građevinskih proizvoda.

Harmonizovani evropski standard EN 771-1 utvrđuje karakteristike i zahteve za

performanse elemenata za zidanje proizvedenih od gline, čija je glavna

predviđena upotreba u zidovima sa ili bez izolacije. U radu su u kratkim crtama

iznete najnovije promene u važećoj regulativi EU koja pokriva oblast ispitivanja

i zahteva koje elementi za zidanje od gline treba da ispune tokom njihove

ekspoloatacije.

Ključne reči: Uredba o građevinskim proizvodima 305/2011, EN 771-1,

elementi za zidanje od gline.

O. Vušović, L. Kurešević, I. Delić-Nikolić

PRILOG ISPITIVANJU I ISTRAŽIVANJU ISTORIJSKIH MALTERA –

MALTER SA CRKVE SVETOG PAVLA U KOTORU, CRNA GORA



Crkva svetog Pavla u Kotoru je sagrađena 1263 godine. Ispitivani uzorak

maltera potiče sa prednje strane ulaza, sa portala. U radu su prikazani rezultati

ispitivanja i izvedeni zaključci.

Ključne reči: Historic mortar, examinations.


T 220

CIVIL ENGINEERING,

HYDRAULIC ENGINEERING,

OFFSHORE TECHNOLOGY,

SOIL MECHANICS

T 220

GRAĐEVINARSTVO,

HIDRAULIKA,

PRIOBALNA

TEHNOLOGIJA,

MEHANIKA TLA



M. Ćosić, R. Folić, B. Folić

MULTIDISCIPLINARY APPROACH TO THE ASSESSMENT OF

SEISMIC PERFORMANCES AND REHABILITATION OF BRIDGES:

NONLINEAR ANALYSES, PROBABILITY THEORY AND

OPTIMIZATION THEORY

Procedia Engineering, Vol. 156, 2016, 83-90.

The paper presents a multidisciplinary approach to the assessment of seismic

performances based on the Performance-Based Earthquake Engineering

(PBEE), taking into account the multi-criteria optimization theory in analyzing

the priority methods for bridge rehabilitation/strengthening. One bridge model

was subjected to Nonlinear Static Pushover Analyses (NSPA), target

displacement analyses using the capacity spectrum method (CSM), vulnerability

analyses, and reliability analyses, while for a damaged bridge, in addition to be

considered using the above methods, was also analyzed using the VIKOR

method of multi-criteria optimization. Seismic performances were determined

based on monitoring the system's plastification and analyzing the relevant

parameters for the level of target displacement, such as target displacement,

total shear force, spectral displacement, spectral acceleration, vibration period,

damping and ductility. The phases of damage were considered using the

probabilistic analysis of vulnerability and reliability: slight, moderate, extensive

and complete, as a function of system ductility.

Keywords: earthquake, nonlinear analyses, performances, damage,

vulnerability and reliability analysis, multi-criteria optimization.


RAD U ČASOPISU MEĐUNARODNOG

ZNAČAJA (M24)

M. Ćosić, N. Šušić, R. Folić, R. Bancila

PROBABILISTIC ANALYSIS OF BEARING CAPACITY OF PILES

WITH VARIABLE PARAMETERS IN CPT TEST AND CALCULATION

ACCORDING TO THE REQUIREMENTS OF EUROCODE 7 (EN 1997-

1: 2004) REGULATIONS

Structural Integrity and Life, Vol. 16, No. 1, 2016, 25-34.

The paper presents a probabilistic concept for determining the pile bearing

capacity, taking into account the variability of CPT test parameters and

methodology of calculation according to the requirements of Eurocode 7 (EN

1997-1:2004) regulations. Based on a single initial (real) CPT test, a higher

number of generated (simulation) CPT tests were introduced drawing on the

solutions of statistics and probability theory. The research found that the best

solutions are achieved using the DA 2 design approach for n(CPT)≥10 tests.

Taking into account the deterministic and probabilistic approach in the analysis

pile bearing capacity, it was found that for the DA 2 design approach the ratio

of pile bearing capacity obtained from the simulation and the capacity as

determined through three methods (Mazurkiewicz, Van der Veen and

hyperbolic approximation) is Rc,d/Pu=1.148. Using the reliability index, the

following values of partial resistance factors were obtained: γb,β≈1.1, γs,β≈1.1,

which also points to the DA 2 design approach.

Keywords: pile, bearing capacity, CPT test, probability theory, Eurocode 7 (EN

1997-1: 2004).


PREDAVANJE PO POZIVU SA

MEĐUNARODNOG SKUPA ŠTAMPANO

U CELINI (M31)

M. Ćosić, R. Folić, N. Šušić

REVIEW OF SCIENTIFIC KNOWLEDGE AND CRITICAL ANALYSIS

OF PILE CAPACITY AND INTEGRITY TESTS

9th International Conference on Civil Engineering Design and Construction

Science and Practice, Varna, Bulgaria, 2016, 1–10.

Based on the analysis of a large number of scientific papers, the authors of this

paper present their own classification pile tests. The general classification is

conducted using high strain and low strain tests, i.e. tests whose basic purpose is

to determine the capacity of piles and tests the purpose of which is to analyze

the integrity of piles. The pile capacity and integrity tests are critically analyzed

by defining their advantages and disadvantages using in-situ investigations, cost

effectiveness, requirements regarding the special education of engineers, the

quality of data obtained, complexity of data processing and the quality of the

processed end results. The proposed classification of pile capacity and pile

integrity tests enables to identify very effectively which is the optimal test type

for further geotechnical analysis of structures and which type of test should be

used in the phase of geotechnical testing for designing and scientific research.

Keywords: pile, tests, classification, capacity, integrity.




A. Đorđević, J. Ćirilović, D. Nedeljković, S. Tošović, V. Jokić

APPLICATION OF COLD-IN-PLACE RECYCLING IN ROAD

REHABILITATION FROM VARIOUS ASPECTS


Montenegro, 2016.

Cold in place recycling is one of the up to date maintenance techniques that is

applied routinely during road rehabilitations. This technique involves using the

existing pavement layers up to 100 % together with a construction of new layers

with “virgin” materials. This paper puts an emphasis on the key stages and

processes needed for a successful application of this method. Furthermore,

using specialized LCA (Life Cycle Analysis) software an environmental

assessment was made for both alternate design solutions i.e. application of cold

in place recycling compared to more common solution: milling the old asphalt

layers and laying down new asphalt pavement.

Keywords: Cold-in-place recycling, road rehabilitation, LCA analysis,

sustainable technologies.

B. Folić, Đ. Lađinović, Z. Brujić, M. Ćosić

PILE-SOIL-PILE INTERACTION IN DESIGNING THE FOUNDATION

OF RC STRUCTURES

5th International Conference of Earthquake Engineering and Engineering

Seismology, Sremski Karlovci, 2016, 379-386.

The paper analyzes the effects of pile-soil-pile interaction on the transverse

bridge frame on specific example of building. It considers a small group of piles

arranged in a single row. The columns are continuously set on piles over the RC

blocks (raft beams). The typical pilesoil conditions were varied. Some phases of

construction, typical of this type of calculation, have been included. The

interaction was analyzed for homogeneous and linear elastic soil (semi-space),

with some other models of analyzing pile-soil interaction were also indicated.


The paper also presents redistribution of forces depending on the stiffness of the

raft beams or superstructure. The calculation parameters were introduced in

mathematical model using a simplified method.

Keywords: pile-soil interaction, bridge frame, specific building, soil

parameters, homogeneous soil, comparative analysis.

J. Ćirilović, D. Nedeljković, A. Đorđević, G. Mladenović, V. Pošarac

EVALUATION OF SMARTPHONE APPLICATION “ROADROID”

FOR MONITORING OF ROAD ROUGHNESS


Montenegro, 2016.

This paper presents the evaluation of the Roadroid smartphone application,

which has found, in the recent years, several applications, mainly on the local

road networks in developing countries. An experiment was conducted that

involved consecutive surveys using (i) bump integrator and (ii) Samsung

Galaxy-II smartphone with the Roadroid application. The results tend to

indicate the level and the domain of applicability of such an android-based

smartphone application for low-cost and rapid road roughness evaluation on a

specific part of the road network. Such applications can be of great use in

country such is Serbia, where there is very limited historical data on the

network condition.

Keywords: Smartphone application, road roughness monitoring, IRI, bump

integrator (BI).

K. Đoković, J. Ćirilović, N. Šušić, G. Hadži-Niković

APPLICATION STATISTICAL ANALYSES AND ARTIFICIAL

NEURAL NETWORK FOR ESTIMATION OF SOIL COMPACTION

PARAMETERS


Montenegro, 2016, 1369-1376.

The paper presents the application of two different methods: regression analysis

and artificial neural network, for the estimation of the compaction parameters


from index properties of the soils. The data, were used for the estimation of soil

compaction parameters, collected from cores from four earthfill dams: Rovni,

Selova, Prvonek and Barje. Regression analysis and artificial neural network

estimation indicated strong correlations (R2>0.7) between the compaction

parameters and soil classification properties.

Keywords: clay, compaction, dams, regression analyses, artificial neural

networks.

K. Đoković, L. Čaki, N. Šušić, G. Hadži-Niković

IDENTIFICATION AND CLASSIFICATION OF DISPERSIVE FINE -

GRAINED SOILS


Montenegro, 2016, 1377-1384.

Dispersive clay soils can not be clearly determined visually or identification

tests in the field, as well as the usual standard methods used for the

identification of soil in laboratory geomechanical practice such as granulometric

analysis and plasticity tests, but for using a special tests: the crumb test, the

double hydrometer test and the pinhole test. Using dispersive clay soils in

hydraulic structures, embankment dams, or other structures, can cause serious

engineering problems if these soils are not identified.

Keywords: dispersive soils, crumb test, double hydrometer test.

M. Ćosić

PERFORMANCE-BASED NONLINEAR STATIC AND DYNAMIC

SEISMIC ANALYSIS OF FRAMEWORK BUILDINGS


Zlatibor, 2016, 47-63.

The paper shows a part of the developed theoretical formulations and results of

numerical analyses conducted in doctoral dissertation, which is defended at the

Faculty of Civil Engineering University of Belgrade in 2015. In summary

volume presents the research in the field of ground motion records and response

spectras, research in the field of non-linear responses of frame system that


participate in the structural system of frame buildings, research in the field of

non-linear response of the 3D model of frame buildings and research in the field

of relations of the 3D model of frame buildings response/seismic demand.

Keywords: earthquake, buildings, nonlinear analyses, performances, Nonlin

Quake.

M. Ćosić, N. Šušić, R. Folić

PROBABILISTIC ANALYSIS OF BEARING CAPACITY OF PILES

WITH VARIABLE PARAMETERS OF CPT TEST AND

CALCULATION ACCORDING TO THE EN 1997-1: 2004


Montenegro, 2016, 1335-1342.

The paper presents a probabilistic concept for determining the pile bearing

capacity, taking into account the variability of CPT test parameters and

methodology of calculation according to the requirements of Eurocode 7 (EN

1997-1:2004). The research found that the best solutions are achieved using the

DA 2 design approach for n(CPT)≥10 tests. Taking into account the

deterministic and probabilistic approach in the analysis pile bearing capacity, it

was found that for the DA 2 design approach the ratio of pile bearing capacity

obtained from the simulation and the capacity as determined through the static

test is Rc,d/Pu=1.148. Using the reliability index, the following values of partial

resistance factors were obtained: γb,β≈1.1, γs,β≈1.1, which also points to the

DA 2 design approach.

Keywords: pile, bearing capacity, CPT test, probability theory, Eurocode 7.

M. Ćosić, S. Brčić, R. Folić, N. Šušić

NONLIN QUAKE: EXPERT SYSTEM FOR PERFORMANCE-BASED

ANALYSIS OF STRUCTURES

5th International Conference of Earthquake Engineering and Engineering

Seismology, Sremski Karlovci, Serbia, 2016, 303-316.

The paper presents the original developed software Nonlin Quake for

performance-based seismic analysis of 3D structural models. Software Nonlin


Quake consists of several independent compatible softwares that implements:

create a database of two componential ground motion records (GMR),

generation and processing of multicomponential GMR, creating incomplete and

complete nonstationary artificial accelerograms, deterministic and probabilistic

seismic hazard analysis, generation and processing of multicomponential

response spectras, analysis of design parameters, processing of pushover curves

and surfaces, calculation based on hybrid incremental nonlinear static-dynamic

analysis, target displacement analysis, analysis and scaling of response spectras

and analysis of target displacement envelope. For four considered methods for

analysis of system performances: nonlinear static pushover analysis (NSPA),

incremental nonlinear dynamic analysis (INDA), incremental dynamic analysis

(IDA) and hybrid incremental nonlinear static-dynamic analysis (HINSDA),

flow charts are shown.

Keywords: Nonlin Quake, earthquake engineering, nonlinear analyses,

performances.

R. Folić, M. Ćosić

ANALYSIS OF VULNERABILITY OF BUILDINGS DAMAGED AS A

RESULT OF TERRORIST ATTACK: SCENARIO OF NON-LINEAR

ANALYSES AND MULTI-CRITERIA OPTIMIZATIONS

International Conference Structural Faults and Repair, Edinburgh, UK, 2016,

1-16.

The paper develops and presents a new multi-disciplinary methodology for the

analysis of vulnerability of buildings exposed to accidental actions due to a

terrorist attack. The methodology is based on Non-linear Static Pushover

Analyses (NSPA) taking into account the principles of Performance-Based

Design (PBD). The stiffness matrix for the impact of vertical actions has been

used as the initial stiffness matrix in the non-linear analysis which is used to

simulate the collapse of individual ground floor columns, forming several

possible scenarios. The stiffness matrix by the end of the analysis which

simulates the collapse of individual columns is used as initial stiffness matrix in

Non-Linear Static Pushover Analysis. The building's vulnerability has been

analyzed based on the calculated global and inter-storey drift, newly developed

damage coefficient, and multi-criteria optimization. Prompt, reliable and

sufficiently accurate answer can be obtained by using newly developed damage


coefficient at the level of entire building in the capacitive domain, from elastic

through non-linear and up to the collapse state. On the other hand, the damage

scenario which requires priority and/or emergency repairs has been identified

using the PROMETHEE multi-criteria optimization and considering the

predefined alternatives and criteria. When linking different scientific disciplines

(non-linear numerical analyses, failure analyses and multi-criteria optimization)

qualitative and quantitative decisions can be made about the vulnerability of

buildings with several optimized aspects.

Keywords: non-linear analysis, scenario, accidental actions, damage

coefficient, multi-criteria optimization.

R. Folić, M. Ćosić

PERFORMANCE-BASED NON-LINEAR SEISMIC METHODS OF

STRUCTURES: A REVIEW OF SCIENTIFIC KNOWLEDGE IN THE

LAST 20 YEARS

16th International Scientific Conference VSU, Sofia, Bulgaria, 2016, 146-156.

The authors of the paper, on the basis of the analysis of several thousand

scientific papers, presented their original systematization of nonlinear seismic

methods for structural performance analysis, which were developed in the last

twenty years. Nonlinear seismic methods are generally classified into two

groups: Nonlinear Static Analyses (NSA) and Nonlinear Dynamic Analyses

(NDA). The analyses of non linear seismic structural response were classified

separately from the target displacement analysis which defines the relationship

of the seismic demand and the seismic response. On the other hand, the

classification was also conducted depending on whether a nonlinear response of

the system is obtained by the implementation of incremental-iterative

procedures or by the implementation of semi-iterative and/or semi-incremental

procedures. Nonlinear Dynamic Analyses were classified according to the

concept of mathematical formulation, i.e. whether they are based on only one

dynamic analysis, several dynamic analyses or are solved in combination with

other methods. By implementing the conducted systematization and

classification of nonlinear seismic methods, one can very efficiently consider

which type of method is optimal for structural analysis and which type of

method should be taken into account in the phase of preliminary and final

analyses in the course of scientific research and professional projects.


Keywords: systematization, nonlinear seismic methods, performances.

T 230

BUILDING CONSTRUCTION T 230

VISOKA GRADNJA


MONOGRAFIJA MEĐUNARODNOG

ZNAČAJA (M12)

R. Folić, Z. Brujić, M. Ćosić

ROBUSTNESS OF REINFORCED CONCRETE BUILDINGS

STRUCTURES - PREVENTION OF PROGRESIVE COLLAPSE

Research Contemporary Problems of Theory of Structures, Monograph

dedicated to the memory of Professor Đorđe Vuksanović, Faculty of Civil

Engineering, University of Belgrade, 2016, 133-143.

The paper starts with some typical damage, of reinforced concrete (RC)

building, caused by incidental actions. These are the structures that have been

deficient in terms of robustness. Related to this is analyzed their impact on

changes in technical regulations and guidelines for the robustness design of

these structures. Some definitions of robustness, which is considered the

capacity of the structure to ensure that the case of local damage does not lead to

progressive structure’s collapse, are commented. Limit the damage is achieved

with structural measures provide margin of capacity, and/or alternative path of

transmission forces. Increase robustness lead to prevent or mitigate local

structures failure. A broad overview of the literature and assessment the

robustness and appropriate recommendations and measures to prevent or

mitigate the progressive collapse, are presented. Some provisions relating to the

robustness of the RC building are compared. A specific analysis of damaged

skeletal buildings structure with the presentation of some results is showed.

Keywords: robustness of structures, local and progressive collapse, analysis of

damaged RC structures.




Z. Radojević, A. Terzić, Lj. Vasić, Z. Bačkalić

THE INVESTIGATION OF OUTWARD APPEARANCE OF FLAWS ON

ROOF TILES


Montenegro, 2016, 757-764.

The investigation presented in this paper was conducted with an aim to identify

nature and cause of non-typical flaws that appeared on outward visible surfaces

of roof tiles. The non-homogeneities appeared on the samples’ surfaces in the

form of stains which manifested after immersions in water and/or aspersing

water on the tile surface. In order to investigate the roof tiles, the quality tests

were conducted in accordance with SRPS EN 1304:2012 standard.

Microstructural analysis was conducted via optical microscope and scanning

electron microscope coupled with energy dispersive spectrometer. The

inhomogeneities appeased as a local phenomenon due to the porous structure of

micro cracks generated by coarse metallic grains that were imported with the

raw materials.

Keywords: building materials; roof tiles; flaws; inhomogeneities;

microstructural analysis.


T 450

METAL TECHNOLOGY,

METALLURGY,

METAL PRODUCTS

T450

TEHNOLOGIJA METALA,

METALURGIJA,

PROIZVODI OD METALA


MONOGRAFSKA STUDIJA

MEĐUNARODNOG ZNAČAJA (M13)

I. Atanasovska, D. Momčilović

SPUR GEAR MODEL FOR PREDICTION OF FATIGUE DAMAGE

INITIATION IN CONTACT ZONE

International Journal of Powertrains – Special Issue on Technologies and

Models for High Power Density Geared Powertrains, Inderscience Publishers,

Switzerland, Vol. 5, No. 3, 2016, 213-229.

DOI: 10.1504/IJPT.2016.079073

The objective of this paper is to give a new viewpoint in contact fatigue

assessment in the spur gears. The presented research is based on up-to-date

methods and multidisciplinary approach, and enables direct prediction of

fatigue damage initiation in contact zones. The special attention is paid to the

developing of model for precise simulation of spur gear teeth contact by finite

element method (FEM). The contact stress calculation based on true contact

involute geometry provides the stress gradients for theory of critical distances

(TCD) application in damage initiation prediction. One particular spur gear pair

is analysed for presenting the spur gear model developing.

Keywords: contact, fatigue, gears, damage, initiation.

V. Grabulov

48 YEARS OF FRACTURE MECHANICS AND STRUCTURAL

INTEGRITY IN SOUTH EAST EUROPE

Fracture at all Scales, Lecture Notes in Mechanical Engineering, Springer

International Publishing, Swizerland, 2016, 1-17.

Development of fracture mechanics and structural integrity in South East

Europe has been presented and analysed. As the starting point, the Magister

thesis of Prof. Stojan Sedmak, 48 years ago (1968), has been taken, followed by

his Doctoral thesis and some of the most important achievements afterwards,


including International Fracture Mechanics Summer Schools and USA-ExYu

project “Weldment Fracture Mechanics” .

Keywords: fracture mechanics, structural integrity, weldment fracture

mechanics.


RAD U ISTAKNUTOM MEĐUNARODNOM

ČASOPISU (M22)

S. Bošnjak, M. Arsić, S. Savićević, G. Milojević, D. Arsić

FRACTURE ANALYSIS OF THE PULLEY OF A BUCKET WHEEL

BOOM HOIST SYSTEM

Eksploatacja i Niezawodnosc - Maintenance and Reliability, Vol. 18, No. 2,

2016, 155–163.

This paper presents the results of the pulley fracture analysis. Experimental

investigations confirmed that the chemical composition and basic mechanical

properties of the pulley material, except the impact energy at a temperature

of –20°C, meet the requirements of the corresponding standard.The impact

energy value at the temperature of –20°C is for ≈45% lower than the prescribed

value which has considerable influence on the appearance of the brittle fracture,

especially having in mind the fact that the bucket wheel excavators operate at

low temperatures. Metallographic examinations as well as magnetic particle

inspections indicated that initial cracks in the welded joints occurred during the

manufacture of the pulleys. Characteristic levels of the rope load cycle are

obtained by using in-house software which includes the dynamic effects of the

resistance-to-excavation. The FEA results pointed out that in the representative

load cases the combinations of the mean stress and the alternating stress in the

pulley critical zone lie considerably below the limit line of the modified

Goodman's diagram. The conclusion, based on the presented results, is that the

fracture of the pulley appeared as the result of the 'manufacturing-in' defects.

Keywords: bucket wheel excavator, pulley fracture, experimental

investigations, FE stress analyses.


RAD U ČASOPISU MEĐUNARODNOG

ZNAČAJA (M24)

A. Sedmak, S. Bošnjak, M. Arsić, S. A. Sedmak, Z. Savić

EXPERIMENTAL EXAMINATION OF FATIGUELIFE OF WELDED

JOINT WITH STRESS CONCENTRATION

Frattura ed Integrità Strutturale/Fracture and Structural Integrity, Vol. 10, No.

36, 2016, 27-35.

Safety of welded structures depends mainly on shapes of welded joints, stress

concentration, heterogeneity of structural and mechanical properties of base

metal (BM), heat affected zone (HAZ) and filler metal (FM), residual stresses

and strains due to welding procedure and imperfections in welded joints.

Welded joints, therefore, are frequent spots of fatigue fractures. Fatigue fracture

in welded structures commonly initiates in the spots of stress concentration.

Significant reduction of fatigue durability is related to theoretical stress

concentration factor which actually is ratio of maximal and nominal stress (kt =

σmax /σ ). Theoretical stress concentration factor data for certain types of

welded joints which are available in literature are mostly obtained by the

method of photo-elasticity, and recently also by the finite elements method.

This paper presents results of experimental examinations of stress concentration

influence to fatigue life of butt welded joints with K-groove, produced from the

most frequently used structural steel S355J2+N. One group of experiments

comprised examinations carried on the K-groove specimens with stress

concentrators of edged notch type. Specimens with short cracks (with limited

length of initial crack), defined on the basis of the experiences from fracture

mechanics by the three points bending examinations, have been examined

according to standard for the determination of S-N curve, and aimed to

determine permanent fatigue strengths for different lengths of initial crack and

functionality between permanent fatigue strength and crack length. Other group

of experiments comprised examinations of specimens with edge notch, prepared

in accordance with ASTM E 399 for the examination by the three points

bending, in order to establish regularity between crack growth and range of

exerted stress intensity factor aimed to determine resistance of welded joint to

initial crack growth, namely fatigue threshold (ΔKth).


Keywords: welded joint, stress concentration, crack, fatigue strength, crack

growth rate, fatigue threshold.

M. Arsić, S. Bošnjak, V. Grabulov, M. Mladenović, Z. Savić

REPAIR WELDING METHODOLOGY FOR THE GLASSES OF THE

KAPLAN TURBINE RUNNER AT THE HYDRO POWER PLANT

DJERDAP 1

Advanced Materials Research, Vol. 1138, 2016, 13-18.

Vertical Kaplan turbines, manufactured in Russia and with nominal power of

200 MW, have been installed in 6 hydroelectric generating units at hydro power

plant ’Djerdap 1’. Hydroelectric generating sets have been designed for the

service life of 40 years due to structural solutions and limited possibilities of

performing periodic inspections and state analyses. During the rehabilitation of

the hydroelectric generating sets, non-destructive tests were performed on all

components and structures in order to complete state analysis. In this paper the

damages and methodology of repair welding for damaged glasses, which are the

integral part of the kinematic system of runner blades, are presented.

Keywords: turbine, runner glass, damage, repairs welding, integrity of

structures.

M. Arsić, Z. Savić, A. Sedmak, S. Bošnjak, S. A. Sedmak

EXPERIMENTAL EXAMINATION OF FATIGUELIFE OF WELDED

JOINT WITH STRESS CONCENTRATION

Frattura ed Integrità Strutturale/Fracture and Structural Integrity, Vol. 10, No.

36, 2016, 63-68.

Safety of welded structures depends mainly on shapes of welded joints, stress

concentration, heterogeneity of structural and mechanical properties of base

metal (BM), heat affected zone (HAZ) and filler metal (FM), residual stresses

and strains due to welding procedure and imperfections in welded joints.

Welded joints, therefore, are frequent spots of fatigue fractures. Fatigue fracture

in welded structures commonly initiates in the spots of stress concentration.

Significant reduction of fatigue durability is related to theoretical stress


concentration factor which actually is ratio of maximal and nominal stress (kt =

σmax /σ ). Theoretical stress concentration factor data for certain types of

welded joints which are available in literature are mostly obtained by the

method of photo-elasticity, and recently also by the finite elements method.

This paper presents results of experimental examinations of stress concentration

influence to fatigue life of butt welded joints with K-groove, produced from the

most frequently used structural steel S355J2+N. One group of experiments

comprised examinations carried on the K-groove specimens with stress

concentrators of edged notch type. Specimens with short cracks (with limited

length of initial crack), defined on the basis of the experiences from fracture

mechanics by the three points bending examinations, have been examined

according to standard for the determination of S-N curve, and aimed to

determine permanent fatigue strengths for different lengths of initial crack and

functionality between permanent fatigue strength and crack length. Other group

of experiments comprised examinations of specimens with edge notch, prepared

in accordance with ASTM E 399 for the examination by the three points

bending, in order to establish regularity between crack growth and range of

exerted stress intensity factor aimed to determine resistance of welded joint to

initial crack growth, namely fatigue threshold (ΔKth).

Keywords: welded joint, stress concentration, crack, fatigue strength, crack

growth rate, fatigue threshold.


PREDAVANJE PO POZIVU SA

MEĐUNARODNOG SKUPA ŠTAMPANO

U CELINI (M31)

V. Grabulov

BEHAVIOR OF WELDMENTS RELATED TO BRITTLE FRACTURE

AS A CRITERION FOR WELDABILITY EVALUATING

International Conference Day of welding technology – Day of new technologies,

Ljubljana, Slovenia, 2016, 21-29.

Evaluating of the weldability of high strength steel, generally means that two

aspects of behaviour must be considered. These are firstly, the risk of cracking

during fabrication and secondly, the risk of failure during service. Because of

that the weldability of steel is a complex property since it covers three main

indications of weldability. Indications of weldability are summarized as

follows:

Sensitivity of weld metal and heat affected zone to any type of cracking during

or after welding, behaviour related to brittle fracture and mechanical and

technological properties of welded joint, macro and microanalysis of base

metal, heat affected zone and weld metal.

In this paper, the part of weldability assessment of two high strength low

alloyed steel are presented. These results are used for integrity assessment of

weldments.

Four different testing methods (instrumented impact Charpy test, nil ductility

drop weight test temperature, explosion crack starter and fracture mechanics

tests) had been applied for brittle fracture behaviours of base metal and welded

joints, produced by manual arc welding. The results, obtained for ΒΜ, WM and

ΗΑΖ were evaluated too as a contribution of weldability testing.

Keywords: Weldability, high strength low alloy steels, transition temperatures,

fracture mechanics.


ISTAKNUTA MONOGRAFIJA

NACIONALNOG ZNAČAJA (M41)

D. Momčilović, R. Mitrović, I. Atanasovska

KONCENTRACIJA NAPONA I ZAMOR MATERIJALA

– SAVREMENI PRISTUP PRORAČUNU MAŠINSKIH ELEMENATA

I KONSTRUKCIJA

Mašinski fakultet Univerziteta u Beogradu, 2016.

Siguran i pouzdan rad mašinskih elemenata i sistema jedan je od imperativa

bezbednosti i energetske efikasnosti mašinskih elemenata i sistema, posebno u

energetici. Polazno sagledavanje osnovne ideje, definisane u monografiji, jeste

da svaki pomak u oblasti razumevanja fizike procesa fenomena zamora i

primene dobijenih karakterističnih veličina, bilo eksperimentalno bilo

numerički, ne može biti učinjen bez razmatranja više redova veličine, od mikro

do makro, kao i integraljenjem znanja iz više tehničkih disciplina.

Na osnovu navedenog, definisan je pravac višegodišnjeg istraživanja čiji je

jedan od rezultata i predmetna monografija, odnosno pitanje kako što tačnije

kvantifikati uticaj izvora koncentracije napona u uslovima zamora. Za rešavanje

ovog zadatka razvijene su nove metode za procenu nastanka i širenja prslina

primenom savremenih teorija, numeričkih metoda i eksperimentalnih rezultata i

definisanje metodologije primene razvijenih metoda na analizu otkaza

konkretnih mašinskih elemenata.

Primena metodologije je opisana na način koji omogućava uočavanje

karakteristika svakog od koraka u njenoj primeni uz jasno naznačene metode

koje su pri tome korišćene i načini analize rezultata, što je od posebne važnosti

za potencijalne čitaoce monografije iz redova inženjera. Primeri iz prakse,

opisanu u monografiji, izabrani su tako da opisuju različite izvore koncentracije

napona, kao šro su: geometrijski diskontinuiteti, izvori koncentracije napona u

uslovima kontakta i kao ostali izvori koncentracije napona kao što su

mikrostuktura, korozija, zavareni spojevi i slično.


RAD U VODEĆEM ČASOPISU


M. Arsić, V. Grabulov, M. Mladenović, Z. Savić, S. Bošnjak

REPAIR WELDING TECHNOLOGY FOR THE GLASSES OF THE

KAPLAN TURBINE RUNNER AT THE HYDRO POWER PLANT

’DJERDAP 1

Energija, Vol. 18, No. 1-2, 2016, 262-267.

Vertical Kaplan turbines, manufactured in Russia and with nominal power of

200 MW, have been installed in 6 hydroelectric generating units at hydro power

plant ’Djerdap 1’. Hydroelectric generating sets have been designed for the

service life of 40 years due to structural solutions and limited possibilities of

performing periodic inspections and state analyses.

During the rehabilitation of the hydroelectric generating set internally

designated as A1, non-destructive tests were performed on all components and

structures in order to complete state analysis. In this paper the damages and

technology of repair welding for damaged glasses, which are the integral part

of the kinematic system of runner blades, are presented. Kaplan turbines, with

nominal power of 200 MW, fulfill their function through the six blade runner.

The role of the glass is to transfer the force from the servomotor piston through

the connecting rod coupled with the crank onto the sleeve, which enables the

displacement of the runner blade and alteration of the rotation angle of the

blade, depending on the turbine regulation system parameters. The need for

blade rotation is derived from the requirements for the optimization of the

efficiency factor due to the alteration of power, stretch and water flow.

Likewise, the role of glasses is to guide the piston and the piston rod,

maintaining the predefined mutual clearance.

Keywords: turbine, runner glass, damage, repair welding, integrity of

structures.


M. Arsić, Z. Savić, S. Bošnjak, V. Gašić, D. Arsić

STATE ANALYSIS OF COMPONENTS OF THE DAMAGED

STRUCTURE AND INTEGRITY EVALUATION OF BRACES AT THE

SPREADER A2RS – B 5500.55 + BRS

Energija, Vol. 18, No. 1-2, 2016, 257-261.

Excavation, transport and spreading of barren soil and crude ore are being

performed by a number of machines during the continuous production process

at excavation sites, such as: bucket-wheel excavator, conveyor and spreader (so

called ECS system). Failure of any machine in the technological chain leads to

the failure of the whole system, and therefore it should be considered a structure

with a serial connection.

In this paper the results of non-destructive tests performed at welded joints and

parent material (visual testing, penetrant testing, ultrasonic testing, radiographic

testing, hardness testing) on the basis of which the state analysis of components

of the damaged structure, integrity evaluation of braces of the cutting and

discharge boom and homogeneity of welded joints of newly formed structures

of the spreader A2Rs - B 5500.55 + BRs at the excavation site ’Drmno’ near

Kostolac, Serbia were performed, are presented. Taking into account the fact

that the user of the spreader does not own the design and technical

documentation, all tests and researches presented in this paper were performed

under the assumption that the lattice structures of both cutting and discharge

boom were made of structural steels S355 and S235, in accordance with

standard EN 10027-1.

Keywords: spreader, state analysis, non-destructive testing, lattice structure,

integrity evaluation.




I. Radisavljević, A. Živković, N. Radović, V. Grabulov

MEHANIČKA I STRUKTURNA SVOJSTVA SPOJEVA OD

RAZNORODNIH ALUMINIJUMSKIH LEGURA ZAVARENIH FSW

POSTUPKOM

29. Savetovanje sa međunarodnim učešćem Zavarivanje 2016, Srebrno jezero,

2016, (CD) 160-169.

U radu su predstavljeni rezultati strukturnih i mehaničkih ispitivanja sučeonih

spojeva raznorodnih aluminijumskih legura AlCu4,5Mg (AA2024) i

AlMg4,5Mn (AA5083) zavarenih postupkom FSW. Primenom optimizovang

alata za zavarivanje, spojene su ploče debljine 6 mm. Međusobni položaj ploča

u spoju je variran tako da je u prvom slučaju ploča od AA2024 pozicionirana na

strani napredovanja a ploča od AA5083 na povratnoj strani spoja. U drugom

slučaju položaj ploča je bio obrnut. Korišćeni su sledeći parametri zavarivanja:

brzina rotacije alata nije menjana i iznosila je 750 obr/min a brzina zavarivanja

iznosila je 73 i 93 mm/min. Dobijeni su spojevi bez prisustva grešaka i sa

glatkom odnosno prihvatljivo ravnom površinom spoja. Analiziran je uticaj

parametra zavarivanja na dobijenu strukturu i mehanička svojstva spoja. Oblik

grumena i u njemu prisutnih koncentričnih krugova, zavisi od brzine

zavarivanja i položaja ploča u spoju. Do loma uvek dolazi na strani spoja gde je

pozicionirana ploča od legure AA5083. Karakteristično je da se lom uvek

dešava na rastojanju od oko 21 mm od centra spoja.

Ključne reči: zavarivanje trenjem alatom, zavareni spoj, legura AA2024, legura

AA5083.

M. Arsić, V. Grabulov , M. Mladenović , Z. Savić

ANALIZA TRENUTNOG STANJA I OCENA ČVRSTOĆE CEVOVODA

NA HIDROELEKTRANI PIROT


2016, (CD) 176-184.


Hidroelektrana Pirot, koja je izgrađena 1990 godine, je akumulaciona elektrana

derivacionog tipa, koja se sastoji od dva nadzemna vertikalna agregata sa

Francis turbinama nominalne snage 41,5 MW, proizvedene u Češkoj Republici,

tunela i ukopanog cevovoda ukupne dužine 2030 m i prečnika od Ø 3000 mm

do Ø 3500 mm. Cevovod debljine lima 22 mm je izrađen od čelika kvaliteta

S275J2G3 (stara oznaka Č.0462). Maksimalni pritisak ispred turbinskog

zatvarača je 2,5 MPa.

Na cevovodu se u kontinuitetu od završetka izgradnje i puštanja u rad sprovode

geodetska merenja kada je cevovod prazan i neopterećen hidrostatickim

pritiskom i kada je cevovod pun. Pregledom i analizom dobijenih podataka o

pomeranjima duz trase cevovoda utvrđeno je da od 2003-2004 godine postoje

znatno veće razlike u pomeranjima za pun i prazan cevovod, nego u

prethodnom periodu.

U radu je izvršena analiza trenutnog stanja i ocena čvrstoče cevovoda kao celine

na osnovu rezultata ispitivanja sučeonih zavarenih spojeva i ukrsnih masta

metodama bez razaranja u zoni preloma na stacionaži - dužini cevovoda

1+263m (vizuelno ispitivanje, ispitivanje magnetnim česticama, ispitivanje

penetrantima, ispitivanje ultrazvukom, radiografsko ispitivanje, metalografsko

ispitivanje metodom replika).

Ključne reči: hidroelektrana, prslina, tehnologija sanacije, čvrstoća cevovoda.

Z. Burzić, M. Manjgo, M. Burzić, V. Grabulov, S. Perković

UTICAJ PROMENLJIVOG OPTEREĆENJA NA INTEGRITET

ZAVARENOG SPOJA MIKROLEGIRANOG ČELIKA


2016, (CD) 232-241.

Ocena sklonosti ka inicijaciji i propagaciji prsline je analizirana ispitivanjem

Šapri epruveta. U radu su prikazani rezultati eksperimentalnog određivanja

parametara rasta zamorne prsline zavarenog spoja mikrolegiranog čelika.

Analizirano je kako heterogenost strukture i mehaničkih svojstava MŠ i ZUT

utiče na pojavu i rast prslina, odnosno parametre rasta zamorne prsline.

Ključne reči: Zavareni spoj, zavarivanje mikrolegiranih čelika, parametri rasta

zamorne prsline, prag zamora.


M. Arsić, S. Bošnjak, M. Mladenović, Z. Savić

OCENA INTEGRITETA ZAVARENIH KONSTRUKCIJA ROTORNOG

BAGERA PRIMENOM ISPITIVANJA BEZ RAZARANJA

Međunarodno savetovanje IBR 2016, Subotica, 2016, (CD) 1-7.

Tehnička dijagnostika u slučaju konstrukcika i delova rotornih bagera

površinski kopova treba da se zasniva na određenim procedurama ispitivanja,

istoriji njihove upotrebe u eksploatacionim uslovima rada, kao i analizi rezultata

tima stručnjaka sa odgovarajućim iskustvom i znanjem iz oblasti projektovanja,

konstruisanja, eksploatacije, održavanja, pouzdanosti, mehanike loma i dr.

Degradacija osobina materijala i/ili zavarenih spojeva konstrukcija i delova

rotornih bagera površinski kopova izazvana je istovremenim uticajem velikog

broja tehnološko - metalurških, konstrukcijskih i eksploatacijskih faktora.

U radu je dat primer gde su ispitivanja bez razaranja omogućila ocenu

integriteta zavarene konstrukcije zatege (lamele) rotornog bagera sa greškom u

zavarenom spoju. Rotorni bager je proizvod nemačke firme “TAKRAF”.

Integritet konstrukcija je relativno nova naučna i inžinjerska disciplina, koja u

širem smislu obuhvata analizu stanja i dijagnostiku ponašanja i popuštanja,

procenu veka i revitalizaciju konstrukcija. To znači da, osim uobičajne situacije

u kojoj treba proceniti integritet konstrukcije kada se ispitivanjima bez razaranja

otkrije greška, ova disciplina obuhvata i analizu naponskog stanja. Ovaj pristup

je posebno važan za zavarene konstrukcije koje su izložene radnim uslovima

tipičnim za nastanak prslina, kao što je zamor.

Ključne reči: rotorni bager, zatega, zavareni spoj, ispitivanja bez razaranja,

integritet konstrukcija.

M. Mladenović, M. Arsić, D. Bajić, R. Miković, Z. Savić

ANALIZA STANJA GORNJEG PRSTENA USMERNOG APARATA

RADNOG KOLA NA HIDROELEKTRANI ĐERDAP 1 IZVRŠENA NA

OSNOVU ISPITIVANJA BEZ RAZARANJA

Međunarodno savetovanje IBR 2016, Subotica, (CD) 51-56.

Na šest hidro-generatorskih jedinica Đerdap 1 ugrađene su vertikalne cevne

turbine Kaplan, nominalne snage 176 MW, izrađene u Rusiji. Projektovane su


za radni vek od 40 godina, zbog konstrukcijskog rešenje, odnosno

nemogučnosti periodičnog ispitivanja i analize stanja. Zavarena konstrukcija

gornjeg prstena usmernog aparata radnog kola izrađena je iz četiri segmenta od

čelika oznake kvaliteta St 3, prema GOSt 977/88. Zavarivanje delova prstena je

izvršeno pod praškom (EPP postupak zavarivanja).

U toku revitalizacije turbine A6, za analizu stanja i ocenu nivoa i uzroka

eventualne degradacije konstrukcije gornjeg prstena usmernog aparata radnog

kola na hidroelektrani Đerdap 1 izvršena su ispitivanja metodama bez razaranja

i ispitivanja sa razaranjem osnovnog materijala i zavarenih spojeva.

U radu su dati rezultati ispitivanja zavarenih spojeva magnetnim česticama i

ultrazvukom. Ispitivanja ultrazvukom su pokazala da postoji neprovarenost u

korenu zavarenih spojeva i lamelarno cepanje u osnovnom materijalu.

Na osnovu rezultata eksperimentalnih ispitivanja izvršena je analiza uzroka

pojave degradacije osnovnog materijala i grešaka u zavarenim spojevima

gornjeg prstena usmernog aparata radnog kola.

Ključne reči: hidroturbina, gornji prsten usmernog aparata, ispitivanja bez

razaranja, degradacija materijala, zavareni spoj.


P 420

PETROLOGY,

MINERALOGY,

GEOCHEMISTRY

T 150

PETROLOGIJA,

MINERALOGIJA,

GEOHEMIJA


RAD U ISTAKNUTOM MEĐUNARODNOM

ČASOPISU (M22)

M. Cocić, M. Logar, B. Matović, S. Dević, T. Volkov-Husović, S. Cocić, V.

Tasić

FINAL FLOTATION WASTE KINETICS OF SINTERING AT

DIFFERENT HEATING REGIMES

Science of Sintering, Vol.48, No 2, 2016, 197-208.

In the copper extraction, especially during the process of flotation enrichment

and the pyrometallurgical processing, the waste materials that represent huge

polluters of environment are being generated. In order to examine the

application of Final flotation waste (FFW) in the manufacturing of new

materials from the glass-ceramic group phase and mineral composition were

examined as well as thermal properties. FFW kinetics of sintering has been

tested at different dyamics (1oC/min, 29oC/min and 43oC/min), in order to find

the optimum conditions for sintering with a minimum amount of energy and

time consumption. The samples were examined using: X-ray diffraction, X-ray

fluorescence analysis, SEM (Scanning Electron Microscopy) and thermal

microscopy. The best results for the production of glass ceramic materials were

obtained during the sintering at heating regime of 29oC/min.

Keywords: Final flotation waste, Kinetics of sintering, Heating rate, Particle

size distribution, Glass ceramics.



V. Simić, F. Abramović, N. Andrić, I. Delić, Z. Miladinović, D. Životić

NEED TO IMPROVE THE NATURAL AGGREGATE RESOURCES

SUPPLY IN THE CITY OF BELGRADE (SERBIA)

Acta Montanistica Slovaca, 21, 3, 191-199.

The City of Belgrade is the largest market for aggregates in Serbia but the

production of natural aggregates is rather small, around five percent of total

consumption. This reflects the geology of the City of Belgrade territory,

dominated by Neogene and Quaternary sedimentary rocks. The production of

crushed rock and sand and gravel on the territory of Belgrade was almost equal,

while majority of imported aggregates is sand and gravel due to lower price.

Consumption of crushed rocks includes around 90 % of limestone and dolomite,

the rest being magmatic rocks. The main issue of using crushed rock on the

territory of the City of Belgrade is the long transport routes, which are usually

near or more than 100 km, creating more logistic problems and increasing cost

of aggregates Therefore it is necessary to establish a good supply system with

low socio-environmental impact of aggregate production and transport, and the

basis for that is the analysis of actual structure of production and supply of

natural aggregates and new potential quarries and/or sand and gravel pits.

Keywords: SARM, SSM, limestone, sand and gravel.




L. Kurešević, O. Vušović, I. Delić-Nikolić

GRADSKA GORA (RUDNIK MT.) DACITE – POTENTIALITY FOR

USE AS A BUILDING STONE



Gradska Gora is a volcanic dome within a Rudnik magmatic massif, situated in

central Serbia. The volcanite of Gradska Gora is represented namely by dacite,

sporadically grading into andesite. It has been traditionally used for various

building purposes by local inhabitants for many decades, with intermittent

organized exploitation of moderate production range. Here presented results of

field examinations and laboratory testing of petrological and technical

properties have defined the potential of this deposit as a source of building

stone, both for architectural purposes and for production of aggregate.

Keywords: Building stone, Rudnik Mt., central Serbia.

M. Cocić, M. Logar, V. Tasić, S. Dević, S. Cocić

PHASE COMPOSITION OF GLASS-CERAMICS OBTAINED BY

CRYSTALIZATION OF BASALT GLASS

48th International October Conference on Mining and Metallurgy, Bor, 2016,

116-119.

The aim of this paper is to as certain the suitability of basalt from Vrelo

(Kopaonik, Serbia) for the production of glass-ceramics. By crystallizing of

basalt glass at the temperature of 9500C a glass-ceramic material was

synthesized with a microstructure which has good mechanical characteristics.

Phase composition of the obtained material was determined by XRPD and

SEM. Two phases were found: pyroxene which corresponds to the omphacite of

the composition (Na0.199K0.180 Ca0.471Mg0.249) 1.1

(Mg0.271Fe0.299Al0.430) 1.0 (Si1.704Ti0.046Al0.250) 2.0O6 and glass with

an approximate ratio 69:31.


The obtained glass-ceramics can be used in the different industrial application

where a high level of hardness and durability is necessary.

Keywords: basalt, glass-ceramics, phase composition, microstructure.

S. Dević, L. Kurešević, M. Cocić

TYPES AND APPEARANCE OF THE FRAGMENTS MOST

FREQUENTLY PRESENT IN THE BRICK CLAY SIEVING RESIDUE


Montenegro, 2016, 61- 68.

After the clay particles size and distribution patterns have been established, it is

necessary to examine the mineralogical composition of the sieve 0.063 mm

residue and its percentage within the original raw material. Fractions above

0.063 mm are not convenient for industrial processing of clays, especially if

they contain fragments of CaCO3 composition.Sieve residue often includes the

fragments of quartz, carbonates, loess nodules, remains of macro flora and

fauna, limonite, mica and opaque minerals. In this paper, we present the macro

and micro appearance of the fragments most often present in the sieve 0.063

mm reside of Serbian brick clays.

Keywords: Brick clays, sieve residue, fragments, mineralogical composition.

S. Dević, M. Cocić

EROSION OF ALUMINA-GRAPHITE NOZZLE FREQUENT CAUSE

OF REDUCED DURABILITY

Third International Symposium on corossion and protection of materials and

the enviroment, Bar, Montenegro, 2016, 77-87.

The goal of this paper was to clarify the appearance of erosion of nozzles

manufactured from refractory material based on the alumina-graphite. Erosion

of the alumina-graphite nozzles occurs due to the effect of casting powder

(external erosion) or due to the effect of steel (internal erosion). The intensity of

the external erosion depends on the type of casting powder being in contact with

the alumina-graphite nozzle. The nature of casting powder is determined by its

mineralogical-chemical composition, so that aggressive casting powders bring


about intense erosion. It is often the cause of reduced durability of the alumina-

graphite nozzles. Namely, the thickness of nozzle wall is reduced due to intense

erosion, which can lead to nozzle cracking and its exclusion from further

utilization. Besides external erosion, the cause of reduced durability of alumina-

graphite nozzle can be internal erosion too, which is the result of steel effect.

Internal erosion is rarely a direct cause of reduced lifetime of alumina-graphite

nozzle. Most often, the internal build-up is formed as a result of the appearance

of internal erosion of nozzle that reduces the nozzle orifice and thereby the steel

flow as well. Such nozzle is excluded from further utilization. The internal

build-up can be formed even without the appearance of internal erosion when it

is exclusively the product of steel de-oxidation and re-oxidation process. The

changes that occurred in the wall of alumina-graphite nozzle due to external or

internal erosion during exploitation have been shown in this paper. They have

been determined by the polarization microscope in reflected and transmitted

light. The changes occurred in the wall directly with the contact of nozzle wall /

casting powder and nozzle wall / steel.The presented examples are characteristic

for special type of refractory material such as the alumina-graphite refractory

material, and therefore, they clarify the occurrence of alumina-graphite nozzle

erosion.

Keywords: Alumina-graphite refractory material, nozzle, external erosion,

internal erosion.


MINERALOGICAL CHARACTER OF THE MIXER SLAG

XXIV International Conference Ecological truth Eco-Ist 16, Vrnjačka Banja,

2016, 265-271.

Blast Furnace slag is a very important secondary raw material obtained in the

technological process of iron and steel production. In addition, there is Blast

Furnace slime, converter slag, mixer slag, mixer dust and other secondary raw

materials. All enumerated secondary raw materials are more or less successfully

applied in different industrial branches. Blast Furnace slag is mostly utilized in

our country's cement industry and road maintenance. A survey of only some of

the results of mineralogical-chemical testing of Blast Furnace slag in Železara

Smederevo is given in this paper, which results were obtained during the

characterization and control of the same in a longer time period. The selected


results determine the characteristic of Blast Furnace slag, and the paper itself

gives a contribution to better knowledge of this secondary raw material obtained

in the iron production process.

Keywords: slag, Blast furnace, secondary raw materials.


ELECTRON MICROANALYSIS OF FRAGMENTS IN SIEVE RESIDUE

OF BRICK CLAY


Montenegro, 2016, 1361-1367.

The paper presents the results of electron microanalysis of fragments found in

the sieve residue of brick clays originating from a deposit formed in loess-

alluvial environment.The deposit is located inVojvodina. Clay from this deposit

is used for production of bricks. Macroscopic and microscopic observation of

0.063 mm sieve residue has enabled the detection of quartz, carbonate and loess

fragments, micas, fragments of macro-flora and macro-fauna. Fragments

contained in the sieve residue were analyzed by scanning electron microscopy

(SEM) and electron dispersive spectrometry (EDS).

Four detection spot (so-called interests) were chosen. Chemical analysis of

selected fragments confirmed the presence of CaCO3 in carbonate fragments

(limestone) and CaCO3 in fragments of macro-fauna (shells). It is also

confirmed that some fragments chemically correspond to feldspar, quartz, mica,

loess and carbonized macro-floral fragments.

Keywords: Brick clays, laboratory analysis, scanning electron microscopy.




I. Delić-Nikolić, O. Vušović, L. Kurešević

LINEARNO TERMIČKO ŠIRENJE ARHITEKTONSKOG KAMENA

VULKANSKOG POREKLA IZ VARDARSKE ZONE

Simpozijuma Društva građevinskih konstruktera Srbije, Zlatibor, 2016, 1005-

1012.

Linearno termičko širenje prirodnog kamena ima veliki značaj pri izvođenju

građevinskih i arhitektonskih radova, jer vertikalne i horizontalne površine na

kojima nije predviđen prostor za termičko širenje kamena mogu biti narušene

do potpuno uništene usled mehaničkih deformacija do kojih dolazi zbog

nastajanja napona pri promeni ambijentalne temperature, na koju prirodni

kamen reaguje dilatacijom i kontrakcijom. Ispitivanje linearnog termičkog

širenja kamena poreklom iz pet vulkanitskih kompleksa Vardarske zone Srbije

pokazalo je da su njihove vrednosti niže u poređenju sa vrednostima linearnog

termičkog širenja poznatih varijeteta granita iz sveta, ali u nivou vrednosti

linearnog termičkog širenja granitoidnih stena poreklom iz iste geotektonske

jedinice.

Ključne reči: linearno termičko širenje, dilatacija, vulkaniti.


B 003

ECOLOGY B 003

EKOLOGIJA




T. Spasojević-Šantić, D. Stanojlović

EARTHSHIP – A NEW HABITAT ON EARTH FOR QUALITY LIFE

1st International Conference on Quality of Life, Kragujevac, 2016, 123-126.

The general view is that people have good quality of life when they meet their

basic needs for shelter, food and water. An earthship is a type of passive solar

house made of natural and recycled materials. Behind the earthship concept is

40 years of research and thousands of built self-sufficient buildings that are

green in its materials and energy efficiency. The quality of life of its residents is

reflected in a state of wellbeing as they live- off- grid, without bills, growing

their own food and living in a harmony with themselves and with nature.

Therefore, this paper shows that the Earthship concept is an excellent example

of a sustainable quality of life.

Keywords: earhtship, new habitat, quality of life.


RAD U VODEĆEM ČASOPISU


G. Dražić, M. Opričić, T. Spasojević-Šantić, D. Milošević

ENERGETSKE KARAKTERISTIKE BRIKETA OD BIOMASE OD

MISKANTUSA

Energija, ekonomija, ekologija, 2016, 74-80.

Cilj ovog rada je uporedna analiza rezultata dobijenih sagorevanjem briketa

čiste trske Miskantusa, briketa trske pomešane sa Topolom (Populus nigra) i

čamovinom i mešavine samo Topole i čamovine. Analizom energetskih

tehničkih karakteristika briketa poreklom od hibridne vrste Miscanthus

xgiganteus ustanovljeno je da velika produkcija biomase po jedinici površine

(10-30 t/ha/godišnje), može nadomestiti manjkavosti koje se ogledaju u većem

sadržaju pepela (3,30%) i koksa (18,34%), odnosno nešto niže toplotne moći

(16,08 MJ/kg) u odnosu na brikete od drvne mase. Predlaže se izrada briketa

koji su mešavina Miskantusa i neke druge vrste biomase, gde bi procentualno

Miskantus imao veći udeo. Ovim bi se dobili kompaktni briketi, sa niskim

procentom vlage, pepela, koksnog ostatka i zadovoljavajuće toplotne moći, što

je i dokazano mešanjem Miskantusa sa Topolom i čamovinom u masenom

odnosu 50:25:25. Takođe se može zaključiti da je ekološki i ekonomski

isplativije proizvoditi brikete koji imaju veći sadržaj Miskantusa, a manji

sadržaj drvne biomase čiji je period rasta i razvoja mnogo duži.

Keywords: bioenergetski usevi, drvna biomasa, žetveni ostaci, briketi.




A. Terzić, N. Mijatović, Lj. Miličić, Z. Radojević

ŠLJAKA IZ PROCESA SAGOREVANJA UGLJA KAO SEKUNDARNA

SIROVINA ZA PRIMENU U GRAĐEVINSKIM KOMPOZITIMA


Šljaka je nusproizvod koji predstavlja 10% ukupne količine materijala nastalog

u procesu sagorevanja uglja u postrojenjima za proizvodnju električne energije.

Veoma mali deo količine šljake je našao svoju primenu, ostatak se odlaže na

deponije. Istraživanja u okviru ovog rada predstavljaju ulazak u novu oblast

ispitivanja mogućnosti primene i plasmana šljake. U tom smislu je sprovedeno

sagledavanje karakteristika i kvaliteta dva tipa šljake (hemijska analiza, sadržaj

teških metala i mikro elemenata u eluatu; mineraloška i fizičko-mehanička

ispitivanja), kao i ispitivanje mogućnosti primene šljake u različitim

građevinskim kompozitnim materijalima. Cilj istraživanja je stvaranje

programskih uslova za upravljanje šljakom i svođenje njenog uticaja na životnu

sredinu i zdravlje ljudi u granice prihvatljivosti.

Ključne reči: ugalj, pepeo, građevinski materijali, revalorizacija, eko materijali.

Z. Davidović, T. Spasojević-Šantić

EKOLOŠKE POSLEDICE SEKTORSKOG PRISTUPA U

FORMIRANJU BRANE I AKUMULACIJE STUBO-ROVNI

Prva nacionalna konferencija sa međunarodnim učešćem Ekološke i socijalne

inovacije: izazovi primenjenih nauka, Beograd, 2016, 65-69.

Uprkos brojnim primedbama stručne javnosti, 01.09.2015.godine otpočelo je

probno punjenje površinske brane i akumulacije “Stubo–Rovni” na reci

Jablanici kod Valjeva, a čiji projekat je zakonski utvrđen još davne 1988.

godine. U radu ćemo se osvrnuti isključivo na primedbe koje se odnose na

narušavanje životne sredine u njenom integralnom obliku, a preko kojih želimo


da prikažemo sve manjkavosti sektorskog pristupa, odnosno zastarelost ovog

pristupa u odnosu na ekosistemski, sa svim mogućim negativnim ekološkim i

društvenim posledicama. Pre svega, osvrnućemo se na “princip odgovornosti”

kao i načela pluri-perspektivizma, kao metodološke odrednice bioetike a koji

podrazumeva naučne i kulturne perspektive per se.

Ključne reči: akumulacija, ekološke posledice, integralno upravljanje.


DOCTORAL DISSERTATIONS DOKTORSKE DISERTACIJE


B. Ilić

UTICAJ TERMIČKI I MEHANOHEMIJSKI AKTIVIRANE

KAOLINSKE GLINE NA MEHANIČKA SVOJSTVA I STRUKTURU

CEMENTNIH KOMPOZITA

Doktorska disertacija odbranjena na Fakultetu tehničkih nauka Univerziteta u

Novom Sadu 2016. godine.

Predmet ovog istraživanja je razvoj nove generacije mineralnih dodataka,

dobijenih termičkom i mehanohemijskom aktivacijom kaolinske gline i

ispitivanje svojstava kompozita, u kojima je deo portland cementa zamenjen

dobijenim pucolanskim materijalima, za različite režime nege.

Kaolinska glina Aranđelovačkog basena, sa visokim sadržajem nečistoća,

podvrgnuta je termičkoj i mehanohemijskoj aktivaciji. Ispitan je uticaj različitih

teholoških parametara procesa termičke aktivacije (temperatura i vreme

zagrevanja) i mehanohemijske aktivacije (vreme mlevenja) na pucolanska

svojstva metakaolina i amorfnog kaolina. Hemijske, strukturne i morfološke

promene kaolinske gline do kojih je došlo tokom termičke i mehanohemijske

aktivacije praćene su XRD, DTA/TG, FTIR, PSD, BET i SEM-EDS metodom.

Pucolanska aktivnost ocenjena je određivanjem čvrstoće pri pritisku, starosti 7

dana, na krečnim malterima, prema standardu SRPS B.C1.018:2001.

Dobijeni metakaolin (MK) i amorfni kaolin (AK), primenjeni su u cementnim

kompozitima u kojima je portland cement zamenjen sa 10 - 50 %. U mešavine

sa preko 30% MK/AK, dodata je izračunata količina kalcijum-hidroksida (CH),

u obliku hidratisanog kreča, da bi se postiglo optimalno iskorišćenje i potpuna

reakcija CH sa pucolanskim materijalom. U cilju poređenja uticaja različitih

režima nege na mehanička svojstva i mikrostrukturu cementnih kompozita,

primenjeni su normalan i autoklavirani režim nege. Pripremljene su cementne

paste sa istim stepenom zamene portland cementa i za iste režime nege, kao i u

kompozitima. Proizvodi hidratacije su određeni XRD i DTA/TG metodom, a

poroznost i raspodela veličine pora metodom utiskivanja žive.

Rezultati su pokazali da su termička i mehanohemijska aktivacija kaolinske

gline jednako pogodne metode za dobijanje pucolanskih materijala -

metakaolina i amorfnog kaolina. Mehanohemijska i termička aktivacija

primenjene na istoj kaolinskoj glini izazvale su različite hemijske, strukturne i

morfološke promene. Uprkos značajnim razlikama u strukturi i fizičko-


hemijskim svojstvima koja su postignuta primenom ove dve različite metode

aktivacije, pucolanska aktivnost amorfnog kaolina je konkurentna metakaolinu.

Različiti faktori doprinose pucolanskoj aktivnosti: kod metakaolina to je

potpuna amorfizacija kaolinita (povećanje sadržaja reaktivnog silicijuma), dok

je kod amorfnog kaolina, delimična amorfizacija kaolinita kompenzovana

potpunom amorfizacijom liskuna i značajnim povećanjem specifične površine.

Rezultati primene metakaolina u cementim kompozitima su pokazali da se pri

normalnom režimu nege, pozitivni efekti na čvrstoće pri pritisku mogu postići

primenom do 30 % MK. Uz dodatno mlevenje nakon termičke aktivacije,

sadržaj MK se može povećati do 40 %, uz dodatak CH. Amorfni kaolin se može

primeniti u kompozitima, sa stepenom zamene portland cementa do 10 %.

Čvrstoće pri pritisku MK kompozita, svih starosti, su veće u odnosu na AK

kompozite usled sledećih razloga: amorfni kaolin, zbog nepotpune amorfizacije

kaolinita, ima manji sadržaj reaktivnog silicijuma, pa je potrošnja CH i

nastajanje C-S-H faze manje. Zbog toga se doprinos čvrstoćama kompozita

može pripisati uglavnom filer efektu, koji delimično kompenzuje manji sadržaj

reaktivne faze i pucolansku reakciju, ali nedovoljno, što je dovelo do smanjenja

čvrstoća pri pritisku.

Pri autoklaviranom režimu nege svi kompoziti sa metakaolinom i amorfnim

kaolinom pokazuju niže čvrstoće pri pritisku u odnosu na referentni portland

cement. Slične vrednosti čvrstoća pri pritisku dobijene su u svim kompozitima

sa metakaolinom i amorfnim kaolinom, izuzev kompozita sa 10 % AK i 50 %

MK (uz dodatak CH), koji su pokazali najviše vrednosti. Smanjenje čvrstoća pri

pritisku svih cementnih kompozita pri autoklaviranom režimu nege je posledica

nastanka hidrogarneta.

Ključne reči: cementni kompoziti, termička aktivacija, mehanohemijska

aktivacija, kaolinska glina, metakaolin, amorfni kaolin.

CERIF: T 152 Kompozitni materijali.


Ksenija Đoković

GEOMEHANIČKA SVOJSTVA ERODIBILNOG I DISPERZIVNOG

FINOZRNOG TLA

Doktorska disertacija odbranjena na Rudarsko-geološkom fakultetu

Univerziteta u Beogradu 2016. godine.

Disperzivna tla su posebna vrsta finozrnog tla, kod kojih usled njihovog

hemijskog i mineraloškog sastava, kao i prirode fluida koji ispunjava porni

prostor, dolazi do slabljenja strukturnih veza i odvajanja pojedinih čestica iz

strukture, koje disperguju i deflokulišu. Ispiranjem i iznošenjem čestica iz

strukture, disperzija se sa mikro nivoa postepeno razvija na makro nivo što za

posledicu ima formiranje posebnih pora u tlu, formiranje erozioni kanali i

pojave unutrašnje erozije u tlu. Primenа finozrnog disperzivnog tla zа izgrаdnju

nаsutih geotehničkih objekаtа: nаsutih zemljаnih brаnа i nаsipа, može

prouzrokovаti ozbiljne inženjerske probleme, ukoliko ovаkvo tlo nije

identifikovаno ili je neogovаrаjuće upotrebljeno tj.ugrаđeno. Disperzivne gline

se ne mogu jednoznačno prepoznati vizuelno identifikacionim opitima na

terenu, ili uobičajenim standardnim metodama koje se koriste za identifikaciju

tla u geomehaničkoj praksi.

U disertaciji su prikazani rezultati laboratorijskih geomehaničkih ispitivanja

uzoraka finozrnog tla u cilju identifikacije i klasifikacije erodibilnog

disperzivnog finozrnog tla. Ispitivanja su sprovedena metodama: grudvice tla

(crumb test), duplog hidrometrisanja - (SCS opit) i strujanja vode kroz

formiranu cilindričnu poru (pinhole opit), na uzorcima: prašinastih glina i lesa

različitog porekla. U cilju poboljšanja svojstva tla razmatran je uticaj zbijenosti

tla na disperzivnost. Ispitivanja disperzivnosti pinhole metodom su pokazala da

stepen zbijenosti nema značajnijeg uticaja na ponašanje - klasu disperzivnosti.

Kako disperzivna tla predstavljaju nepovoljna tla za ugradnju/izgradnju nasutih

objekata analizirana je i mogućnost poboljšanja tla dodavanjem

elektrofilterskog pepela. Ispitivanjima sprovedenim pinhole opitom na uzorcima

disperzivnog tla dodavanjem 10, 30 i 50% pepela, postignuto je željeno

ponašanje, ona su postala nedisperzivan.

Ključne reči: disperzivne gline, erozijа glinа, opiti disperzivnosti, grudvice,

opit duplog hidrometrisаnja, pinhole opit, hemijskа ispitivаnjа, nasute brane.

CERIF: T 220 Građevinarstvo, hidraulika, priobalna tehnologija, mehanika tla.


ORGANIZATION

OF CONFERENCES ORGANIZACIJA

STRUČNIH SKUPOVA


PETO NAUČNO-STRUČNO MEĐUNARODNO SAVETOVANJE

ZEMLJOTRESNO INŽENJERSTVO I INŽENJERSKA

SEIZMOLOGIJA

Sremski Karlovci, 28-30. jun 2016.

Organizatori:

Savez građevinskih inženjera Srbije

Društvo za zemljotresno inženjerstvo Srbije

Institut IMS Beograd

Inženjerska komora Srbije

Orbis Novi Sad

Cilj Savetovanja je da se omogući široka razmena iskustava i metodologija rada

stručnjaka različitih profila koji se bave istraživanjem, projektovanjem i

građenjem seizmički otpornih konstrukcija i da se ukaže na glavne pravce

razvoja zemljotresnog inženjerstva i inženjerske seizmologije u našoj zemlji i

regionu, kao i da se stvore uslovi za donošenje dokumenta sa nacionalnim

parametrima i usvajanje Evropskih normi i prateće regulative koje važe u

zemljama Evropske unije.


KONFERENCIJA

SAVREMENI MATERIJALI I KONSTRUKCIJE SA REGULATIVOM

Beograd, 17. jun 2016.

Organizatori:

Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije


Građevinski fakultet Univerziteta u Beogradu

Inženjerska komora Srbije

Konferencija Građevinski materijali i konstrukcije sa regulativom 2016. godine

obuhvata veoma širok raspon osnovnih tema, pa tako obuhvata kompozite,

keramičke materijale,izolacione, konstrukcione, eko materijale, kao i domaću i

međunarodnu regulativu. Zbornik radova obuhvata 14 radova i obima je 150

strana. Veliki broj radova tretira konkretne probleme koji se javljaju u

savremenoj građevinskoj praksi pri izradi na primer,torkret betona ili

samougrađujućih betona,kao i mikroarmiranih betona i maltera. Načinima

ugradnje cementnih kompozita takođe, posvećena je dužna pažnja.

S obzirom na savremenu i aktuelnu problematiku održivog razvoja, tj. održivog

graditeljstva i na količine i problem postojanja otpadnih materijala u Srbiji, u

nekoliko radova se prikazuju rezultati eksperimentalnih istraživanja primenom

otpadnih materijala kao na primer šljake iz procesa sagorevanja uglja,zatim

otpadnih materijala kao i njihove primene u samozbijajućim betonima i u

lakoagregatnim konstrukcijskim betonima. Prikazuju se i potencijalni

ekonomski efekti primene otpadnih materijala. Recikliranim materijalima je

takođe posvećena pažnja i prikazana je mogućnost njihove primene u betonima

i malterima sa aspekta tehnologije, ekonomičnosti i trajnosti. Radi se o

recikliranom agregatu od drobljenog betona,drobljenoj opeci, recikliranom

staklu od katodnih cevi, letećem pepelu,flotacijskoj jalovini itd.


PREDAVANJE

DINAMIKA KONSTRUKCIJA I TLA PRI ZEMLJOTRESIMA,

NEPOUZDANI MODELI, NEPOUZDANI PARAMETRI I TEORIJA

VEROVATNOĆA

Prof. dr Boris Jeremić

Department of Civil and Environmental Engineering, University of California

and Faculty Scientist Earth and Environmental Sciences, Lawrence Berkeley

National Laboratory

Beograd, 16. decembar 2016.

Organizatori:

Savez građevinskih inženjera Srbije

Društvo za zemljotresno inženjerstvo Srbije

Srpsko društvo za mehaniku tla i geotehničko inženjerstvo


Građevinski fakultet Univerziteta u Beogradu


RESEARCH PROJECTS

FINANCED BY THE

MINISTRY OF EDUCATION,

SCIENCE AND

TECHNOLOGICAL

DEVELOPMENT

NAUČNI PROJEKTI

FINANSIRANI OD STRANE

MINISTARSTVA

PROSVETE, NAUKE

I TEHNOLOŠKOG

RAZVOJA


NAUČNI PROJEKTI

FINANSIRANI OD STRANE MINISTARSTVA PROSVETE, NAUKE

I TEHNOLOŠKOG RAZVOJA

TEHNOLOŠKI RAZVOJ

Ev.

broj

Naziv projekta

35002 Razvoj novih metodologija

revitalizacje turbinske i

hidromehaničke opreme

hidroelektrana u zavisnosti od

uzroka degradacije materijala

Dr Miodrag Arsić,

rukovodilac projekta


Dr Zoran Odanović

Nebojša Milovanović

36014 Geotehnički aspekti istraživanja

i razvoja savremenih tehnologija

građenja i sanacija deponija

komunalnog otpada

Dr Nenad Šušić,

rukovodilac projekta

Dr Ksenija Đoković

Dušan Berisavljević

Jelena Ćirilović

36017 Istraživanje mogućnosti primene

otpadnih i recikliranih materijala

u betonskim kompozitima, sa

ocenom uticaja na životnu

sredinu, u cilju promocije

održivog građevinarstva u Srbiji

Dr Aleksandra Mitrović

Dr Ksenija Janković

Mr Dragan Bojović

Ljiljana Lončar

Marko Stojanović

35011 Integritet opreme pod pritiskom

pri istovremenom delovanju

zamarajućeg opterećenja i

temperature

Dr Dejan Momčilović

Mr Vujadin Aleksić


35006 Održivost i unapređenje

mašinskih sistema u energetici i

transportu primenom

forenzičkog inženjerstva, eko i

robust dizajna

Dr Miodrag Arsić

35029 Razvoj metodologija za

povećanje radne sposobnosti,

pouzdanosti i energetske

efikasnosti mašinskih sistema u

energetici

Dr Dejan Momčilović

35040 Razvoj savremenih metoda

dijagnostike i ispitivanja

mašinskih struktura

Željko Flajs

INTEGRALNA I INTERDISCIPLINARNA ISTRAŽIVANJA

Ev.

broj

Naziv projekta

45008 Razvoj i primena

multifunkcionalnih materijala na

bazi domaćih sirovina

modernizacijom tradicionalnih

tehnologija

Dr Zagorka Radojević

Dr Anja Terzić

Dr Milica Arsenović

Dr Miloš Vasić

Ljiljana Miličić

Ivana Delić


OSNOVNA ISTRAŽIVANJA

Ev.

broj

Naziv projekta

186010 Minerali Srbije: sastav, struktura,

geneza, primena i doprinos

održanju životne sredine

Dr Snežana Dević

172005 Uticaj nano i mikrostrukturnih

konstituenata na sintezu i

karakteristike savremenih

kompozitnih materijala sa

metalnom osnovom

Dr Zoran Odanović

174004 Mikromehanički kriterijumi

oštećenja i loma


172057 Usmerena sinteza, struktura i

svojstva multifunkcionalnih

materijala

Dr Anja Terzić


AWARDS AND

RECOGNITIONS NAGRADE

I PRIZNANJA


SELECTED

BUSINESS REFERENCES ODABRANE

STRUČNE REFERENCE


U ovom odeljku dat je pregled ključnih usluga koje je Institut IMS izvršio u

2016. godini.

U skladu sa multidisciplinarnom organizacijom Instituta, usluge obuhvataju

izradu investiciono-tehničke dokumentacije, ispitivanja na terenu i u

laboratorijama, stručni nadzor nad izvođenjem radova, studije, ekspertize i

drugo u praktično svim oblastima građevinarstva, mašinske industrije i

energetike.

Pregled referenci je dat po organizacionim celinama.


THE CENTRE

FOR MATERIALS CENTAR

ZA MATERIJALE


CENTAR ZA MATERIJALE

Laboratorija za građevinsku keramiku

R.b. Referenca Investitor

1. Elaborat o oceni kvaliteta opekarske

sirovine sa ležišta Ratkovo

Osnovni sud

Sombor

2. Elaborat o oceni kvaliteta sirovine sa

povećanim sadržajem karbonata sa ležišta

Čekmin, sa definisanjem recapture za

primenu u proizvodnji crepa

IGM Mladost d.o.o.

Leskovac


sirovine sa lokacije Energo-zelena, sa

preporukama receptura za primenu u

ciglani u Inđiji

Univerzum-Kubršnica

a.d. Aranđelovac


sirovine sa ležišta Crne bare crepane IGM

Polet, Novi Bečej

IGK Polet a.d.

Novi Bečej


sirovine sa ležišta Garajevac istok crepane

IGM Polet, Novi Bečej

IGK Polet a.d.

Novi Bečej


sirovine sa ležišta Šimuđ« crepane IGM

Polet, Novi Bečej

IGK Polet a.d.

Novi Bečej

7. Studija o rezultatima dijagnosticiranja

temperaturnog režima rada tunelske peći sa

U kasetama, sa preporukama za

optimizaciju procesa pečenja u crepani

DILJ d.o.o. Vinkovci, Hrvatska

IGM DILJ d.o.o.

Vinkovci, Hrvatska


Laboratorija za beton


1.

Završne ocene kvaliteta betona za objekte

izvedene u Srbiji

Širbegović grupa,

GMT Konstrukcije,

Gračanica, BiH

2. Kontrola kvaliteta ugrađenih materijala

tokom izvođenja radova na autoputu E-80,

deonica Čiflik-Dtaničenje

Construcctiones Rubau

– Ogranak Niš

3. Kontrola kvaliteta betona na gradilištu

Paralelni put Bela –Palanka Pirot

Ferbild

4. Tekuća kontrola kvaliteta betona na

gradilištu: Autoput E-763, deo 3: Obrenovac

– Ub

China Shandong

International Economic

& Technical,

Ogranak Beograd

5. Kontrola kvaliteta materijala na

građevinskom objektu: izgradnja autoputa

E-75, deonica LOT 3 – tunel Predejane i

LOT 4 – TUNEL Manajle

Euro Alliance Tunnels

JSC, Ogranak Beograd

6. Kontrola kvaliteta na deonici autoputa E-75

Grdelica – Caričina Dolina Azvi

7. Kontrola kvaliteta na deonici autoputa E-75

Caričina Dolina – tunel Manajle Prijedor - putevi

8. LOT B3.2 Izgradnja Ostružničkog mosta u

konzorcijumu sa UTIBER, Mađarska

JP Putevi Srbije


THE CENTRE

FOR METALS

AND ENERGETICS

CENTAR

ZA METALE

I ENERGETIKU


CENTAR ZA METALE I ENERGETIKU

Laboratorija za ispitivanje metala

Kontrolno telo

Laboratorija za etaloniranje mehaničkih veličina


1. Ispitivanje opreme u elektrani tokom

četvrte etape revitalizacije – HE Đerdap 1

(IBR, IR, tehnologije zavarivanja, prijem

opreme u fabrikama u zemlji i

inostranstvu, procena preostalog veka)

JP EPS BEOGRAD

Ogranak HE Đerdap

HE ĐERDAP 1

2. Ispitivanje materijala sa razaranjem i

ispitivanje materijala bez razaranja

JP EPS BEOGRAD

Ogranak RB Kolubara

3. Ispitivanje glavnih parovodnih linija RA,

RB, RC i ispitivanje prestrujnih parovoda

na blokovima A1, A2, A3, A4, A5 u TENT

A (IBR, IR, replike)

JP EPS BEOGRAD

Ogranak TE Nikola

Tesla A

4. Ispitivanje materijala otkovaka i zavarenih

spojeva za izradu rezervne predturbinske

rešetke za potrebe HE Đerdap 1 u CMB

STEEL CONSTRUCTION u Turn

Severinu u Rumuniji

ĐERDAP USLUGE

a.d. Kladovo

5. Fabrički prijem opreme za HE Đerdap 1

Kontrolisanje hidroenergetske opreme pri

izradi i sanaciji delova hidroagregata u

fabrikama: LMZ, Silovie Mašini, Rusija;

DOOSAN IMGB, Bukurešt, Rumunija;

GENERAL TURBO, Bukurešt, Rumunija;

PILSEN STEEL, Plzeň, Češka )

JP EPS BEOGRAD

Ogranak HE Đerdap

HE ĐERDAP 1


6. Ispitivanje užadi za prednaprezanje,

Ispitivanje čeličnih cevi za izradu

mikrošipova

AZVI S.A. – Ogranak

Novi Sad

7. Ispitivanje opreme bez razaranja

HMO – HE Pirot

JP EPS BEOGRAD,

Ogranak HE ĐERDAP

– HE PIROT

8. Usluge za potrebe HE Perućica,

Kontrolisanje stanja materijala račve 7B,

8A i 8B trećeg cjevovoda

ELEKTROPRIVREDA

CRNE GORE a.d.

Nikšić

9. Ispitivanje betonskog čelika ARCELOR MITTAL

ZENICA d.o.o.

Zenica

10. Ispitivanje betonskog čelika METALFER STEEL

MILL d.o.o.

Sremska Mitrovica

11. Ispitivanje ankera,

Ispitivanje armaturnih mreža,

Ispitivanje rebrastog betonskog čelika

EURO ALLIANCE

TUNNELS JSC-

Ogranak Beograd

12. Ispitivanje mehaničkih osobina vijaka,

navrtki i podloški

MARKANT

Valjevo

13. Ispitivanja proizvoda od gvožđa i čelika

(armatura, užad za prednaprezanje, cevi...)

Ogranak Terna S.A.

Serbia, Beograd


14. Etaloniranje uređaja za merenje

mehaničkih veličina

EPS Beograd

Ogranak RB Kolubara

Poliester Priboj

La Farge Beočin

Holcim Novi Popovac

Krušik Valjevo

Azvirt Beograd

Železara Smederevo

JAT Tehnika Beograd

Fabrika bakarnih cevi

Majdanpek

Lasta Beograd

Energoprojekt

niskogradnja Beograd


THE CENTRE

FOR ROADS

AND GEOTECHNICS

CENTAR

ZA PUTEVE

I GEOTEHNIKU


CENTAR ZA PUTEVE I GEOTEHNIKU

Dinamičko ispitivanje šipova - DLT metoda Investitor

1. Mostovi na Koridoru X i XI,

ispitano je više od 25 šipova

Azvi

Trace

Azvi/Rubau

Energorpojekt

China Shandong

Italiana

Costruzioni

2. Ispitano je više od 10 šipova za industrijska

postrojenja i stambeno-poslovne komplekse na

teritoriji Republike Srbije

Deneza M

Exing B&P

Gradina

Max 5 inženjering

Ispitivanje integriteta šipova - SIT metoda

3. Objekti na trasi Koridora X i XI,

ispitano je više od 1500 šipova na teritoriji

Republike Srbije

Azvi

Trace

Integral

Prijedor Putevi

China Shandong

Italiana

Costruzioni

4. Ispitano je 500 šipova za objekte različitih

namena na teritoriji Republike Srbije

Deneza M

Exing B&P

Gradina

Max 5 inženjering


5. Mostovi na autoputu Banja Luka – Doboj, Bosna

i Hercegovina, ispitano je 100 šipova

Geosonda

Fundiranje

Statičko ispitivanje šipova - SLT metoda

6. Ispitano je više od 10 šipova statičkim probnim

opterećenjem za objekte različitih namena na

teritoriji Republike Srbije

Projekti sanacije klizišta

7.

Tokom 2016. godine Centar za puteve i

geotehniku uradio je 16 projekata sanacije

klizišta na regionalnim i državnim putevima I i II

reda širom Srbije, na teritoriji Novog Pazara,

Valjeva, Čačka, Guče, Ivanjice, Zaječara,

Leskovca itd.

JP Putevi Srbije

Pzp Valjevo

Novi Pazar Put

PZP Zaječar

Trace - PZP Niš

Trace - PZP Vranje

Putevi Čačak


Odeljenje za geotehniku


1.

Geomehanička kontrola kvaliteta materijala i

ugradnje materijala za potrebe izgradnje

Autoputa E 763, deonica 3: Obrenovac-Ub

China Shandong

International Economic

and Technical, Beograd

2. Laboratorijska geomehanička ispitivanja za

potrebe izrade Projekta rehabilitacije

jalovišta rudnika Stolice u opštini Krupanj

Institut za vodoprivredu

Jaroslav Černi,

Beograsd


potrebe izgradnje Distributivnog centra Lidl

sa upravnom zgradom i pratećim objektima

Elita Cop d.o.o Beograd

Vlado Baumaschinen,

d.o.o. Zemun


potrebe izgradnje severnih pristupnih puteva

prema Novom mostu preko reke Save, Lot 1

Construcciones Rubau

Ogranak Beograd

5. Prethodna ispitivanja materijala iz

pozajmišta i kontrola ispitivanja materijala

ugrađenih u rekonstruisani nasip i osiguranje

obala korita reke Kolubare i reke Peštan

JP Elektroprivreda

Srbije, Beograd

PK Baroševac

6. Geomehanička kontrola kvaliteta materijala i

ugradnje materijala za potrebe izgradnje

Autoputa E 75, Lot I, potez Grdelica Gornje

Polje-Caričina Dolina

Azvi S.A.

Ogranak Novi Sad

7. Geomehanička kontrola kvaliteta ugrađenih

materijala za objekat B - Beograd na vodi

Energoprojekt

Visokogradnja a.d.

8. Kontrolna ispitivanja asfaltnih mešavina,

uzoraka iz kolovoza, bitumena, bitumenskih

emulzija, kamenog brašna, peska i frakcija

kamog agregata za objekat Autoput E-763,

Beograd – Južni Jadran, sektor II: Ljig –

Požega

Azvirt

Ogranak Beograd


9. Kontrolna ispitivanja asfaltnih mešavina i

uzoraka iz kolovoza, za potrebe izgradnje

Obilaznice oko Beograda, deonice B1, B2 i

B3.1

Ratko Mitrović-

niskogradnja d.o.o.

Beograd

10. Prethodna ispitivanja asfaltnih mešavina za

potrebe izgradnje Koridora X, autoput E-80:

Niš-Dimitrovgrad, deonica: Čiflik-Pirot

(Istok), LOT 1: Put i mostovi od Čiflika do

Staničenja

Construcciones RUBAU

Ogranak Beograd

11. Prethodna ispitivanja asfaltnih mešavina za

potrebe izgradnje Autoputa E-763, Beograd

– Južni Jadran, sektor V: Lajkovac -Ljig

Energoprojekt

Niskogradnja a.d.

Beograd


THE CENTRE FOR

STRUCTURES

AND PRESTRESSING

CENTAR ZA

KONSTRUKCIJE

I PREDNAPREZANJE


CENTAR ZA KONSTRUKCIJE

I PREDNAPREZANJE

Odeljenje za prednaprezanje


1.

Primena sistema prednaprezanja SPB i SPB

SUPER i radovi na prednaprezanju konstrukcije

mostova: Koznička reka i Kamenolom, na

autoputu E-75, deonica Caričina dolina –

Vladičin Han, lot 5, poddeonica Caričina dolina

– Tunel Manajle

Ogranak Integral

Inženjering Beograd

2. Prednaprezanje i ispitivanje geotehničkih sidara

na potpornom zidu L4, na autoputu E-75,

deonica Caričina dolina – Vladičin Han, lot 5,

poddeonica Caričina dolina – Tunel Manajle

MaksPro d.o.o. Zemun

3. Inženjering usluge prilikom ugradnje,

injektiranje i prednaprezanja geotehničkih sidara

i ankera, kao i ispitivanje istih, za potrebe

stabilizacije kosina Mrtvica 1, Mrtvica 2 i

Mrtvica 0, na autoputu E-75, deonica Caričina

dolina – Vladičin Han, lot 5, poddeonica

Caričina dolina – Tunel Manajle

Vektor Integra

Sarajevo,

Ogranak Beograd

4. Inženjering usluge prilikom prednaprezanja

geotehničkih sidara i ispitivanje geotehničkih

sidara, za potrebe stabilizacije kosina na autoputu

E-75, deonica Gornje polje – Tunel Predejane,

LOT 1

Azvi S.A.

Ogranak Novi Sad


za potrebe stabilizacije kosina na izlaznim

profilima tunela Predejane, na autoputu E-75,

deonica Grdelica - Caričina dolina, LOT 3

Unogradnja V.V d.o.o.

Beograd



za potrebe stabilizacije kosina na ulaznom profilu

tunela Šarani, na autoputu E-763

Geosonda –

Konsolidacija a.d.

Beograd

7.



mosta preko reke Kolubare na km 16+299, na

autoputu E-763, deonica Obrenovac - Ub

Structurama Precast

d.o.o. Beograd

8.



nadputnjaka na km 65+370, na paralelnom

nekomercijalnom putu Bela Palanka - Pirot

Trace Group Hold PLC

ogranak Beograd

9.


SUPER i radovi na prednaprezanju talpi za

zaštitu iskopa na HE Bočac 2, na reci Vrbas kod

Banja Luke

Integral Inženjering

a.d. Laktaši, BiH

10.



mosta preko reke Vrbanje u Banja Luci

Beton d.o.o. Gradiška,

BiH

11. Primena sistema prednaprezanja SPB i SPB


mosta preko Kutinske reke u Nišu

ASA Ibelik d.o.o.

Beograd


za potrebe stabilizacije klizišta na kosini iskopa

za pristupne puteve brane i akumulacije Arilje,

profil Svračkovo

Hidrotehnika –

Hidroenergetika a.d.

Beograd


SUPER na liftovanju gornjeg stroja konstrukcije

mosta preko reke Jadar u selu Draginac, Opština

Loznica

Filos Mostovi d.o.o.

Beograd




mosta preko Dičine reke u Brđanima

Meta Balkan d.o.o.

Beograd



mosta preko reke Gornja Trešnjica u Ljuboviji

Meta Balkan d.o.o.

Beograd

16. Ispitivanje geotehničkih sidara za potrebe

osiduranja stabilnosti objekta separacije u

Runiku uglja Pljevlja

Geosonda –

Konsolidacija

Podgorica

17. Radovi prednaprezanja na sanaciji mosta

Trebaljevo, kod Kolašina, na pruzi Beograd-Bar

Strabag d.o.o. Beograd

18. Inženjering usluge i ispitivanje geotehničkih

sidara na ankernom bloku u temelju T8 cevovoda

HE Perućica

Bi-kod d.o.o.

Podgorica

19. Vanredno merenje sile u ankerskom polju HE

Grančarevo kod Trebinja

Mješoviti Holding

ERS – MP a.d.

Trebinje,

ZP Hidroelektrane na

Trebišnjici a.d.

Trebinje

20. Specijalistički stručni nadzor rada pogona za

adheziono prednaprezanje elemenata Martini

Gradnja

Martini Gradnja d.o.o.

Inđija


Odeljenje za sanacije, projektovanje i

nadzor


1. Idejno rešenje, projekat za građevinsku

dozvolu i projekat za izvođenje gradskog

drumskog mosta preko Grošničke reke,

Kragujevac

Grad Kragujevac,

Gradska uprava za

poslove

gradonačelnika i

gradskog veća

2. Idejno rešenje, projekat za građevinsku

dozvolu i projekat za izvođenje gradskog

drumskog mosta preko Bresničke reke,

Kragujevac

Grad Kragujevac,

Gradska uprava za

poslove

gradonačelnika i

gradskog veća

3. Projekat za izvođenje rekonstrukcije mosta

Češka ćuprija na kanalu Bezdan – Vrbas,

na lokalnom putu Bački Monoštor –

Bezdan, Sombor

Grad Sombor

4. Projekat za izvođenje sanacije veze starih i

novih stubova u sklopu lamele I upravne

zgrade Beogradskog sajma

DP Beogradski

sajam

5. Projekat za izvođenje sanacije montažnih

ploča u okviru objekta u Takovskoj 49 u

Beogradu

Mozzart d.o.o.

Beograd

6. Stručni nadzor na rekonstrukciji, sanaciji i

adaptaciji objekta OPN 75/18 – balistički

tunel

Bezbednosno-

informativna agencija

7. Stručni nadzor na rekonstrukciji mosta

Češka ćuprija na kanalu Bezdan – Vrbas,

na lokalnom putu Bački Monoštor –

Bezdan, Sombor

Grad Sombor


8. Stručni nadzor na sanaciji rezervoara R1,

R2, R4, R6 u objektu SkPg Fruška Gora

Arc Monte d.o.o.

Beograd

9. Glavni pregled objekata beogradskog

sajma:

Elaborat o stanju konstrukcije Hale 1




DP Beogradski sajam

10.

Stručno mišljenje o stanju oslonačke AB

konstrukcije rezervoara za skladištenje

amonijaka 30I-901 u pogonu Amonijak II

i skladište amonijaka Azotare u Pančevu

HIP-Azotara d.o.o.

Pančevo

11. Stručno mišljenje o pojavi defekata na

podnoj oblozi u objektu KDU Mala sirena

u Beogradu

Zidar, Negotin

12. Stručno mišljenje o stanju objekata

proizvodnog pogona u Bačkoj Topoli

Perutnina Ptuj Topiko,

Bačka Topola

13. Elaborat o stanju konstrukcije objekta

aeratora na novom postrojenju za

prečišćavanje vode u Pančevu

JKP Vodovod i

kanalizacija, Pančevo


Laboratorija za ispitivanje konstrukcija


1. Ispitivanje mostova probnim opterecenjem,

izgradnja autoputa E-80, deonica Sukovo -

Dimitrovgrad

Trace Group Hold Plc

Ogranak Beograd

2. Ispitivanje mostova probnim opterecenjem,

izgradnja obilaznice oko Beograda, deonica

Dobanovci - Bubanj Potok

MBA Miljković d.o.o.

3. Kontrola vertikalnosti i veličine sile unete u

užad antenskog stuba na lokaciji Kikinda

H=105.0 m

Kodar inženjering

d.o.o.

4. Kontrola vertikalnosti i veličine sile unete u

užad antenskog stuba na lokaciji Sombor-

Kljajićevo H=105.0 m

Amiga d.o.o. Kraljevo

5. Ispitivanje stenskih ankera, izgradnja

autoputa E-75, deonica Caričina dolina -

tunel Manajle

Ogranak Integral

inženjering Beograd

6. Ispitivanje stenskih ankera, izgradnja

autoputa E-75, tunel Manajle

Euro Alliance Tunnels

JSC


CERTIFICATION BODY SERTIFIKACIONO TELO


SERTIFIKACIONO TELO

Institut IMS ad je na osnovu Rešenja Ministarstva građevinarstva, saobraćaja i

infrastrukture broj 35-00-00251/2013-04 od 28.05.2014. godine, imenovan kao

telo za sprovođenje ocenjivanja usaglašenosti cementa opšte namene i cementa

za specijalnu namenu u skladu sa zahtevima Pravilnika o kvalitetu cementa (Sl.

glasnik RS, br. 34/13 i 44/14).

Institut IMS a.d. je upisan u registar imenovanih tela za ocenjivanje

usaglašenosti pod jedinstvenim registarskim brojem И 030.

Institut IMS a.d. je krajem 2013. godine potpisao ugovor sa češkim institutom

TZUS (www.tzus.cz) o saradnji i zajedničkom nastupu na tržištu RS, kojim se

proizvođačima građevinskih proizvoda iz RS omogućava sertifikacija proizvoda

u skladu sa važećom regulativom u EU (Uredbom (EU) br. 305/2011

Evropskog parlamenta i Saveta (CPR) i harmonizovanim tehničkim

specifikacijama) i izvoz na tržište EU.

Saradnja sa češkim institutom TZUS, Prag nastavljena je i u 2016. godini kroz

zajedničko sprovođenje sertifikacije proizvoda prema harmonizovanim

evropskim standardima, kao i kroz održavanje obuka u cilju pripreme osoblja

Instituta IMS za predstojeće izmene regulative.


Sertifikacija proizvoda prema harmonizovanim

evropskim standardima

1. ROCKWOOL ADRIATIC d.o.o., Potpićan, Hrvatska

2. URSA SLOVENIJA d.o.o., Novo Mesto, Slovenija

3. TRIMO INŽENJERING d.o.o., Beograd, Srbija

4. FIBRAN S.A., Thessaloniki, Greece

5. SIKA d.o.o., Beograd, Srbija

6. LAFARGE BFC d.o.o., Beočin, Srbija

REVIEW NAUČNIH I STRUČNIH rezultata 2016.pdf · REVIEW OF RESEARCH AND BUSINESS RESULTS OF THE...

Documents

Transcript of REVIEW NAUČNIH I STRUČNIH rezultata 2016.pdf · REVIEW OF RESEARCH AND BUSINESS RESULTS OF THE...