Alpha Eritrean Engineers' Magazine February's Issue

7/29/2019 Alpha Eritrean Engineers' Magazine February's Issue

1/15

AEEC | October 2011 1

Alpha Eritrean Engineers CommunityFEBRUARY2013

VOL 4NO. 1

RECYCLING

ENHANCING THE

PROPRIETIES OF

SCRAP

TIRES

THROUGH

POLYMER

BLEND

MATERIALS TESTING &SPECIAL INSPECTION SERVICE ARE PROFESSIONAL CIVIL

ENGINEERING SERVICES

CELEBRATING ENGINEERS WEEK

LIST OF COMPANIES HIRING

AEEC

Join AEEC

celebrating

Engineers week

February 17 23

2013

Striving for

excellence,

En ineer Feven


2/15

AEEC | February 2013 1

CONTENTS AND CONTRIBUTORS

RECYCLING ENHANCING THE PROPRIETIES OF

SCRAP TIRES THROUGH POLYMER BLEND

BY FEVEN MATTEWS

MATERIALS TESTING AND SPECIAL

INSPECTION SERVICES ARE PROFESSIONAL

CIVIL ENGINEERING SERVICES

BY MEDHANIE TECLE

CELEBRATING NATIONAL ENGINEERS WEEK

BYYOSIEF WOLDEMARIAM

JOB APPORTUNITIES

BYFILIPOSABREHAM

EDITORS

SEBLE GEBREMEDHIN,M.S. IN

PSYCHOLOGY

ADIAM WOLDEGERGISH,PH.D INORGANIC CHEMISTRY

SAMSON GONNETZ,B.A. IN CIVIL

ENGINEERING

FILIPOSABREHAM,M.S, IN SOFTWARE

ENGINEERING AND

YOSIEF WOLDEMARIAM,B.A. IN

ELECTRICAL ENGINEERING


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I was born in Jeddah Saudi Arabia, on October 1990. Imoved to Eritrea with my family in 1995. I got a chance

to learn more about my traditions, culture, my language

and had the privilege of attending elementary andmiddle school at the Finland Mission. I attended two

years high school in Kenya and then completed the

remainder two years in Saudi Arabia. I then attended

college in Malaysia as an undergraduate where Icompleted my degree in Chemical Engineering atUniversity College Sedaya International, UCSI

University. Throughout my studies I was able tomaintain exemplary academic results and this would not

have been possible without the everlasting support of

my parents, who are my INSPIRATION. I still plan to

pursue my graduate program in the future for a PhD, as

I am a great believer of continued learning.

As for now, it is a privilege and a great honour for me

to share this article which I have written for AlphaEritrean Engineers Magazine.

INTRODUCTION

Tires are made from natural rubber, synthetic rubber,

elastomers, polymers and other additives which highlycontribute in their ability to withstand the rigidity of the

environment. Tires have high durability and hence are

safe when used in vehicles. The fact that tires cannot be

easily decomposed when disposed makes them the mainthreat to the environment due to its continuous increase

in demand. However, when scrap tires catch fire, theyrelease very toxic gases contributing to the greenhouse

effect.

The same distinctiveness that makes tires undesirablefor disposal makes them perfect for recycling and

reusing them for different applications including mats,

carpets, moisture barriers, rubber-modified asphalts andplaygrounds. Consequently, to minimize the effect of

waste tire on the environment and use them for safe

application, a greener way was established with the help

of polymer blend.

This research endeavour to enhance the property of the

waste tire through the technology of polymer blend by

combining waste tire dust (WTD) with an elastomerthat is ethylene vinyl acetate (EVA) in presence of

bisphenol a diglycidyl ether (BADGE) act as a

compatibilizer. The blend is also irradiated in order toimprove the cross-linking between the components

Finally the effects of BADGE composition and

irradiation dosage on the mechanical, thermal and

morphological properties of the blend were analyzedThese procedures are summarized in figure 1.

BACKGROUND

The history of recycling materials started during the

times of Plato in 400 BC. It was not until 19th

and 20th

centuries the need for raw materials required in

industrial development caused cheaper option ofreusing scrap materials rather than buying a new one. In

21st

century, the main motivation of recycling materials

became the fact when natural resources were reducingin quantity while emission of carbon dioxide was

increasingly leading to the greenhouse effect. A perfect

example of justifying the objectives of recycling in 21s

century is recycling of scrap tires.

Alexander Parkes discovered polymer blend duringQueen Victoria 9

thyear reign. During this period, two

isomers which are cis-1,4-polyisoprene (natural rubber)

and rigid trans-1,4-polyisoprene (gutta percha) were

blended. They were then softened in a mixture of CS2with SCl2 and milled with SCl2 in a hot rubber mill

This product showed cross-linking taking place and therigidity of the material varied with composition. After150 years, the fundamental behind polymer blend has

not changed much. It is based on the selection of

components with complementary properties, thengeneration of the desired, stable morphology by means

of compatibilization.

During 19th

century, the polymer industry started

dealing with rubber and thermosets. Subsequently

synthetic polymers were introduced dominated by

thermoplastics. The first thermoplastic produced hadpoor mechanical properties. Thus, it was blended with

rubber to implement and enhance the rigidity of the

thermoplastic to produce a high impact polystyrene an

RECYCLING ENHANCING THE PROPRIETIES OF SCRAP TIRES THROUGH POLYMER BLEND


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polymeric plasticiser used to further make polyvinyl chloride.

In the 1960s, Allan Hay accidentally discovered polyphenylene ether when blending high impact polystyrenewhich resulted in improving the processability of the material at a high temperature. In the 1980s, with the help of

automotive industries the cost, paintability, solvent and scratch resistance was improved, in addition to

mechanical properties and processability. The growth in need of recycling polymers developed better

technologies of blending over time.

Figure 1: Schematic flow of the process

OBJECTIVES FOR RECYCLING TIRES

Scrap tires are unsuitable for use due to wear and irreparable damage. There is no known method for tire disposal

without adverse effects. Hence, the recycling of polymers after their intended use continues to be an important

subject having various advantages such as:

a. Reduces the amount of rubber produced in futureb. Prevent environmental pollution by reducing the production of greenhouse gases and mitigating global

warming effect

.


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c. Save energy as producing a raw materialconsumes considerable amount of energy

resource

DESCRIPTION OF THE PROCEDURE

The scrap tires used in this research were grinded into

different sizes from 40 to 80 mesh. Generally, there are

many methods used to blend polymers such as meltmixing, solvent mixing, in-situ polymerization and

many more. In this research, the grinded tire was

blended with EVA through a melt mixing process using

Haake Rheomix Polydrive R600/610 machine.

EVA is copolymer of ethylene and Vinyl Acetate (VA).

The weight percentage of Vinyl Acetate affects the

rigidity of the polymer and can vary from 5 to 18 wt%.The lower the percentage of VA (5%) the more rigid the

end product will be. A higher the percentage of VA (15-18%) produces a more flexible film having higher

degree of toughness and better elongation. Therefore, inthis research the EVA blended contained 15 wt% of VA

with a melting flow index of 1.478g/10min and a

density of 0.93 g/cm3.

The compatibilizer used that is BADGE, acts as a

lubricating agent during the blending process. In order

to analyze its effect on the blending process, the amountof BADGE added varied from 0wt% to 5wt% with an

increment of 1wt% for each blend.

The blended sample was hot and cold pressed into 1mm,

3mm and 6mm sheets which were further cut into

BS6747, ASTM D256, and ASTM D2765 standardsrespectively. These standards are used for tensile,

impact and hardness testing respectively.

Later, the mechanical, thermal and morphological testswere conducted on the blend to determine the effect of

the BADGE added and irradiation dosage applied.

PROPERTY TESTED

Polymer blend materials, imposed by the requirement

of specific application, must perform under exhaustinmechanical, chemical, thermal, and electrical conditions

The mechanical properties include tensile impact an

hardness which play a major role in our everyday life.

Mechanical behaviour implies any reaction of th

material when under mechanical stress result ideformation. Information obtained during mechanica

tests of polymers, can determine how strong or stiff

material is, whether it is brittle or ductile, hard or sof

and if it can hold up well under constant stress.

I still plan to pursue my graduate program in thfuture for a PhD, as I am a great believer of continuelearning.

Tensile properties: include young modulumodulus 100, elongation percentage, and tensil

strength. These properties determine how polymer will react to forces applied durin

tension. They are very important to determin

when dealing with materials that need to be

E M A E E M A E E M A E

E E M A E E MAMEEA


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stretched during application. They are alsogreatly affected by temperature.

Impact properties: can be measured using izod,charpy, gardner, tensile impact and many more.

The results obtained from these impact tests canbe used for material selection or quality control.

Polymers are sensitive to stress concentration at

a notch. The information obtained from this willhelp to prevent designing of materials with

polymers that cannot withstand the required high

stress concentration at the edge or sharp corners.

Hardness properties: is measured usingDurometer test or Rockwell hardness test.

Durometer test is used as an alternative for

flexibility for the specification of elastomers.

The hardness value is determined by thepenetration of the Durometer indenter foot into

the sample.

Gel content property: provides a means ofcontrolling the process and rating the quality offinished products. The degree of cross-linking is

resolute by measuring the swell and extraction

occurring in a solvent where the portion of the

polymer is not cross-linked.

Thermal properties or thermal analysis is a technique in

which a property of the sample is monitored against

time or temperature while the temperature of the samplin a specified atmosphere is programmed. The therma

analysis techniques are categorized based on th

variables they are designed to examine. The tw

techniques used in this research are:

Differential Scanning Calorimetry (DSC): idefined as a technique in which heat flow int

sample and reference is measured as a functioof temperature. The sample is subjected to

controlled temperature program. Th

information obtained from this test the

determines glass transition temperature, heacapacity jump at the glass transition, meltin

and crystallization temperatures, heat o

reaction, characterization of thermosets an

measurement of liquid crystal transitions.

Thermogravimetric Analysis (TGA): is used to obtaithe onset temperature of initial polymer weight loss, a

well as the extent of oxidative effects or char formation

It

involves measurement of the weight gain or losof a polymer as a function of temperature antime, and utilizes an extremely sensitiv

electronic microbalance.

In polymer science, the word morphology means t

form an organization on a size scale above the atomiarrangement but smaller than the size and shape of thwhole sample. The morphology of a polymer sample i

determined by a wide range of optical, electron an

scanning probe microscopy techniques. In hereresolution and contrast are the major parameters o

microscopy studies. Among many techniques, the on

used during this research was scanning electro

microscopy (SEM).

Scanning Electron Microscopy (SEM): is on

of the most versatile instruments available fothe examination and analysis of th

microstructural characteristics of polymers. The

major reason for the SEM usefulness is the higresolution and large depth of field which i

responsible for the three dimensiona

appearance of the specimen image


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RESULTS AND DISCUSSION

The main parameters affecting the property of the blendof EVA and WTD, are the weight ratio of polymer and

compatibilizer blended, mixing time, blending

temperature and particle size. Previous researchers havestudied the effect of weight ratio, temperature and time

to find out the optimum conditions for EVA:WTD(80:20) wt%, 140oC and 10 mins. respectively.

In this research, how the particle size of WTD had

affected the mixing torque and tensile properties of the

blend was examined. Torque can be related to resistance

of flow in which an increase in melting decreased theviscosity hence reducing in what happens to the torque.

The sizes of WTD chosen for this study were 40 meshand 80 mesh. In comparison between the two, the torque

for 40 mesh gave a higher value indicating the blendingprocess was less viscous. This is because the finer thesize of the WTD, the more surfaces area provided for a

better homogeneity and distribution.

When comparing the tensile properties, elongation %

and tensile strength favors 80 mesh whereas youngmodulus and modulus 100 favoured 40 mesh. Generally,

80 mesh size is preferable, but the low availability of it

caused to proceed with 40 mesh size.

The EVA and WTD blend in presence of BADGE was

greatly affected in its mechanical, thermal andmorphological properties by the irradiation dosageapplied and the ratio of BADGE added. The mechanicalproperties were seen to improve as the irradiation

dosage was increased from 0 kGy to 200 kGy except forelongation percentage and impact properties. This is

because irradiation causes cross-linking between the

blends hence encouraging brittle behavior. The presence

of a BADGE as a compatibilizer causes lubricationeffect within the blend. As a result, the mechanical

properties are seen to increase with increase of BADGE

composition except for elongation percentage, impact

and hardness properties.

The thermal and morphological properties of pure EVAwere improved by blending EVA with WTD.

The stability of EVA and WTD blend was reducewhen the ratio of BADGE and irradiation dosag

increased. The morphology of the impact sample

showed the smooth cracking and homogeneity of th

blend causing the impact property to reduce.

CONCLUSION

In conclusion, it was seen that BADGE as a

compatibilizer does not accelerate the irradiation

induced cross-linking between EVA and WTD. This

being said, the EVA and WTD blend can be used for

different R-resistant, ozone resistant applications

including bottles, oil and gas ceiling as the

mechanical, thermal and morphological propertiesare improved.

Reference

1. L.A. Utracki, Compatibilization and Recycling iPolymer Blends. RAPRA technology Ltd, 2000, Ch 3 an9, pp 9-28.

2. C. Sawyer, T. Grubb, and F. Meyers, PolymeMorphology and Polymer Characterization in PolymeMicroscopy 3rd ed. Springer, Ch 1, pp 1-21.

3. J. Scheirs, Sample preparation, Thermal analysis an

Microscopy of polymers in Compositional and FailurAnalysis of Polymers. John Wiley and Sons, Ltd, 2005Ch 3-5, pp 37-107.

4. Thermal Analysis and Thermal Properties iCharacterization and Failure Analysis of Plastics. ASMInternational, 2003, Ch 11, pp 115-142.

5. F. Ciardelli and S. Penczek, Processing for UltimatProperties in Modification and Blending of Synthetand Natural Macromolecules. Kluwar AcademiPublishers, 2003, Ch 10, pp 201-205.

6. M.L. Robeson, Fundamentals of polymer blend

Compatibilization methods, Types of polymer blends,


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7. and Properties of polymer blends in Polymer Blend. CarlHanser Verlag, 2007, Ch 2-4,6, pp 11- 250, 333-350.

8. J.E. Mark, B. Erman, and F.R. Eirich, Elastomer blends,Thermoplastic elastomers, Tire engineering andRecycling of Rubber in The Science and Technology ofRubber 3rd ed. Elsevier Academic Press, 2005, Ch 12-15,pp 529-665.

9. Polymer blend technologies in Review of Science andTechnology in Escwa Member Countries Issue 4. UnitedNations, Ch 3, pp 28-31.

10. J.G. Drobny, Thermoplastic Elastomers Based onRecycled Rubber and Plastics in Handbook ofThermoplastic Elastomers. William Andrew Inc, 2007, Ch14, pp 277-280.

11. V. Mittal, J.K. Kim, K. Pal, Recycling of ElastomericNanocomposites in Recent Advances in ElastomericNanocomposites. Springer-Verlag Berlin Heidelberg,2011, Ch 2, pg 179-181.

12. W. Grellmann, S. Seidler, Mechanical Properties of

Polymers, in Polymer Testing. Carl Hanser Verlag, 2007,Ch 4, pp 73-218.

13. Z.D. Cheng, Thermal Analysis and Calorimetry ofelastomers, Polymer degradation and Temperaturemoduluated Differential Scanning Calorimetry inHandbook of Thermal Analysis and Calorimetry. ElsevierScience B.V., 2002, Ch 13-14 and 16, pp 519-650 and 713-810.

14. H. Lobo and J.V. Bonilla, Thermogravimetric Analysis ofPolymers in Handbook of Plastics Analysis. MarcelDekker, Inc., 2003, Ch 4, pp 1-18.

15. G. Raju et al., Graft Copolymerization of Methyl Acrlateonto Oil Palm Empty fruit Bunch (OPEFB) Fiber journalof Polymer-Plastics Technology and Engineering, Volume46, pp 949-955, 2007.

16. I. Banik, A.K. Bhowmick, Effect of electron beamirradiation on the properties of crosslinked rubbersjournal of Radiation Physics and Chemistry, Volume 58,pp 293-298, 2000.

17. D. De et al., Reclaiming of ground rubber tire (GRT) bynovel reclaiming agent journal of European PolymerJournal, Volume 42, pp 917-927, 2006.

18. R.L. Clough, High-energy radiation and polymers: A

review of commercial processes and emerging

applications journal of Nuclear Instruments andMethods in Physics Research, Volume 185, pp 8-33, 2001.

19. KIM ET AL.,THERMAL PROPERTIES OF AGRO-FLOUR-FILLEDBIODEGRADABLE POLYMER BIO-COMPOSITES JOURNAL OF

THERMAL ANALYSIS AND CALORIMETRY,VOLUME 81, PP 299-

306,2005.

20. C.K.HSU,THERMAL DECOMPOSITION PROPERTIES OF POLYMERFIBERS JOURNAL OF THERMOCHIMICA ACTA,VOLUME 392-393PP 163-167,2002.

21. J.FROHLICH ET AL.,THE EFFECT OF FILLER-FILLER AND FILLER-ELASTOMER INTERACTION ON RUBBER REINFORCEMENTJOURNAL OF COMPOSITES:PART A,VOLUME 36, PP 449-460,

2005.

22. M.TAMADA ET AL.,CROSSLINKING OF POLYVINYLCARBAZOLEWITH ELECTRON BEAM IRRADIATION JOURNAL OF RADIATION

PHYSICS AND CHEMISTRY,VOLUME 54, PP 409-411,1999.

23. YANG ET AL.,THERMAL PROPERTIES OF LIGNOCELLULOSICFILLER-THERMOPLASTIC POLYMER BIO-COMPOSITES JOURNALOF THERMAL ANALYSIS AND CALORIMETRY,VOLUME 82, PP

157-160,2005.

24. Z.MOHAMAD ET AL.,CHARACTERIZATION OF EPOXIDIZEDNATURAL RUBBER/ETHYLENE VINYL ACETATE (ENR-50/EVA

BLEND:EFFECT OF BLEND RATIO JOURNAL OF APPLIED

POLYMER SCIENCE,VOLUME 99, PP 1504-1515,2006.

25. Z.A.ANIS ET AL.,PERFORMANCE OF IRRADIATED ANDCROSSLINKED ETHYLENE VINYL ACETATE/WASTE TIRE DUST

BLEND JOURNAL OF ELASTOMERS AND PLASTICS,VOLUME 43,PP 239-256,2011.

26. A.BHATIA ET AL.,COMPATIBILITY OF BIODEGRADABLE POLY(LACTIC ACID)(PLA) AND POLY (BUTYLENE SUCCINATE)(PBS)

BLENDS FOR PACKAGING APPLICATION JOURNAL OF KOREA-

AUSTRALIA RHEOLOGY,VOLUME 19, PP 125-131,2007.27. Z.A.ANIS ET AL.,EFFECT OF MIXING CONDITIONS ON THE

TENSILE PROPERTIES OF ETHYLENE VINYL ACETATE/WASTE

TIRE DUST (EVA/WTD)BLEND JOURNAL OF POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING,VOLUME 48, PP

1139-1142,2009.

28. B.A.IBRAHIM ET AL.,INFLUENCE OF POLYMER BLENDING ONMECHANICAL AND THERMAL PROPERTIES IN JOURNAL MODERN

APPLIED SCIENCE,VOLUME 4, PP 157-161,2010.

~ Engineer Feven Mathews


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E E M A E E MAMEEA

Wow, what a great job!!! I am really proud of you guys. Ijust got the email and start reading it, it sounds really good.

Thank you for your hard work and making it happen. Great

job!!!

Engineer Mekonen Hadgu

It is really nice to see the project issuing its first output.

Great work and keep it up. Hope it will inspire lots of

Eritrean Engineers and may be it will be a venue forattaining engineering carries for a lot of young Eritrean and

the like.

Engineer Filipos Abreha

Bravo. This is really wonderful and your effort and those of

others is much appreciated and needed. I hope the best for

the future of AEEC and its members. I also want to thank

you for your kind words in the 1st edition. I am very

humbled and honored. I believe that if we are in a position

to lend a helping hand to our fellow people, then the fruits

of that simple effort are enjoyed by many.

Engineer Daniel Woldeselasie

A

EE

C

I was glad to read the June 2012 issue of Alpha Eritrean Engineers

Community magazine and read it "cover" to "cover". I loved it.

I am writing you this email to propose a few things, if I may so. First

and for most I think the magazine is such a brilliant idea in keeping

Eritrean Engineers connected and in informing each other what areas

of research, advancements, breakthroughs and challenges in the vast

discipline and specializations of Engineering.

That said here are my suggestions:

Make it a magazine where everyone puts forward his/ her

breakthroughs, researches, activities and thesis papers for ideas of

other intellectuals...make it a sharing place and not merely a place of

telling old stories but future stories too.

Engineer Danyom Berhane

Excellent year for the group and excellent work. You have done great!

2013 could only be better and I wish you all the best. I am sure the

group and many more Eritreans will achieve many great things and

you have just made it a bit easier for many! That is what we all should

do - a better place and better path for others.

Note there is a PECVD job opening in the upper NY side and if anyonewants the job let me know and I will forward to a hiring manger.

Engineer Yosief Berhane

ALPHA ERITREAN ENGINEERS

Comments & Suggestions

Page


10/15


My name is Medhanie Tecle and I have worked as a

civil engineer for over 20 years. I earned my B.S.

degree in Civil Engineering from Addis Ababa

University, Ethiopia and received my M.S. degree

in Civil & Environmental Engineering from

University of Nevada, Las Vegas. I am currently

employed at Cardno ATC as a Principal

Engineer/Engineering Manager. As a manager at

the Las Vegas Branch, I provide senior level

management for the day-to-day operations and

administration of geotechnical engineering and

construction materials testing services. My

responsibility primarily is to ensure the quality for

the geotechnical engineering and construction

materials and testing services meet or exceed

regulatory requirements of the general industry and

professional standards. My experiences include:

Senior Geotechnical and Materials Engineer with

Terracon Consultants, Inc., Staff Professional with

Kleinfelder, Inc., Research and Teaching Assistant

at University of Nevada, Las Vegas, Engineerin

Manager with Segen Construction Co., in Asmara

Eritrea, and Assistant Lecturer II at Arba Minc

Water Technology Institute in Ethiopia.

This article will introduce the engineerin

community about Construction Materials Inspectio

and Testing and the roles and responsibilities of

Professional Civil Engineer.

The intended purpose of Materials Testing an

Special Inspection Services is to verify certai

structural elements are being built in accordanc

with the approved project plans and specification

for a project.

When conducting Materials Testing, it is critica

that the materials being used in construction o

these structural elements (i.e. soils, reinforce

concrete, structural steel, structural masonry

fireproofing) meet the intended design quality an

specifications. These construction materials ar

tested in accordance with rigorous, exact specifie

standards like those found in the American Societ

for Testing and Materials (ASTM) and America

Association of State Highway and Transportatio

Officials (AASHTO) Testing Standards. I

addition, these standards outline specifi

experience, certifications and accreditations of th

personnel and laboratories that perform these tests.

Inspection and testing firms should also have

detailed quality system manual which outlines frombeginning to end how all tests are to be performed

MATERIALS TESTING AND SPECIAL INSPECTION SERVICES ARE PROFESSIONAL CIVIL

ENGINEERING SERVICES


11/15


in the field and in laboratory. The manual outlines

how the testing equipment are to be calibrated,

explains detailed testing procedures, the process for

personnel training is, shows expected periodic

review and the audit necessary by both internal staff

and external agencies. The manual further includes

reporting requirements and proper review of all

data. The new standards presently require all

material testing services be performed under the

supervision of a Professional Civil Engineer.

For Special Inspections, it is critical that certain

structural elements be inspected during construction

to verify that they are being installed as per the

specifications and project plans as outlined in the

manual. Chapter 17 of The 2009 International

Building Code (IBC) defines the special

inspectionprocess as Inspection as herein required

of the materials, installation, fabrication, erection o

placement of components and connections requirin

special expertise to ensure compliance wit

approved construction documents and reference

standards.

The role and duties of a special inspector argenerally defined by the local Building Officia

Many Building Officials now follow th

International Code Council (ICC) Model Code fo

Special Inspections or variation of it.

Part of this Code requires a quality system manua

that details how they will perform their specia

inspection duties, certifications of staf

accreditation of their office/lab, internal staff reviewand outside agency audits, etc.

This Model Code for Special Inspections als

requires all special inspection services be performe

under the supervision of a Professional Civ

Engineer.

Materials Testing and Special Inspection Service

are an essential part of a successful design an

construction team. As noted above, most locanational and international codes and standards now

require these services be performed under th

direction of a Professional Civil Engineer.

~ Engineer Medhanie Tecle


12/15



E E M A E E MAMEEA

Go lden, secure,

stronger, better

and brighterfuture

A E E MAlpha Eritrean Engineering Magazine


13/15


In celebration National Engineers Week, Alpha Eritrean Engineers Community commemoratesthe contribution engineers make to our society. We also thank you and appreciate the talent and

commitment each one of you contributes to Alpha Eritrean Engineers Magazine to elevate thesprite of our cooperation by sharing your experiences and aspirations in your articles. Your

articles encourage engineering as a career path among those who have strong will and would bewilling to go extra mile to make a difference in their own and somebody elses life. The

combined effort of the authors and editors of AEECs complimentary magazine make it a

magazine that connects engineers around the globe, informs of professional opportunities and

shares priceless experiences. We look forward to learning how you celebrate engineers week and

any of your engineering experiences, challenges, aspirations, accomplishments and successes.

We would specially like to say thank you for those who worked diligently to see February

2013 issue publication and those who constantly gave us words of encouragements, ideas

and helped us in editing each and every article to make it better

and presentable. We congratulate all of you for making this

possible.

Happy engineers week!

Engineer Yosief Woldemariam

Monday, March 04, 2013

A

E

E

C

Bringing the bestand the brightesttogether

Hard to reach doesnt have to mean hard to do


14/15


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15/15


The authors

[email protected] her BS in

Chemical Engineering from University College

Sedaya International, UCSI, and currently Feven

is working with Malaysian Nuclear Agency as an

Intern.

Medhanie [email protected] his B.S. in in CivilEngineering from Addis Ababa University & MS

in Civil & Environmental Engineering from

University of Nevada, Las Vegas and currently

he is Principal Engineer/Engineering Manager atCardno ATC.

Yosief Woldemariam

[email protected] earned his B.S. inElectrical Engineering from San Francisco State

University. Currently he is working with Syska

Hennessy Group, consulting firm as designer.

If you need an updated information,

discussions or got an Engineering

experiences that you want share

your knowledge or ideas with your

fellow professionals.

You will find us on

www.linkedin.com/groups/Alpha-

Eritrean-Engineers-Community


E E M A E E MAMEEA
mailto:[email protected]:[email protected]://www.linkedin.com/company/1284856?goback=%2Enpv_91217335_*1_*1_*1_*1_*1_en*4US_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1&trk=prof-exp-company-namemailto:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]://www.linkedin.com/company/1284856?goback=%2Enpv_91217335_*1_*1_*1_*1_*1_en*4US_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1&trk=prof-exp-company-namemailto:[email protected]

Alpha Eritrean Engineers' Magazine February's Issue

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Transcript of Alpha Eritrean Engineers' Magazine February's Issue