"Building Assets for You"

Universal Buildwell Pvt. Ltd Gurgaon, Haryana

SUMMER INTERNSHIP REPORT 13/06/2016 - 13/07/2016

Submitted by :

Abhishek Singh

Naval Tej Singh Ahuja

Sahil Thakur

Swapnil Singh

CERTIFICATE

Certified that the internship project report Construction of Residential Township – Universal Aura is the bonafide work of Abhishek Singh (500029234), Naval Tej Singh (500030036), Sahil Thakur (500030087), Swapnil Singh (500029949), IV Year B.Tech. in Civil Engineering with specialization in Infrastructure Development of University of Petroleum and Energy Studies (UPES), Dehradun carried out under my supervision during 13 June 2016 to 13 July 2016.

Place: Gurgaon Date: 13 July 2016___________________________ _______________________________

Mr. Kapil BhardwajSenior Manager - ProjectsUniversal Buildwell Pvt. Ltd Gurgaon

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Acknowledgements

I would like to acknowledge the contributions made by various people for the project and forproviding me a helping hand in the making of this particular project. I would like to mention the work and hard work put in by our Mentor: Mr. Kapil Bhardwaj (Sr. Manager - Projects) for his support and guidance.

Also I would like to thank Ms. Madhu Rathee (AGM – HR) who has given me this opportunity to carry out the internship program.

I am also thankful to the Engineering Staff of Universal Buildwell Pvt. Ltd present on the site for providing me full assistance on the site.

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TABLE OF CONTENT

DESCRIPTION PAGE

Introduction to Company 04 Introduction to Project 05 Project Details 06 Building Materials 13 Reinforced Cement Concrete 20 Plain Cement Concrete 22 Formwork 28 Ongoing Work 30

Layout for Brickwork Masonry Wall Construction Wall Alignment Check

Duties of Project Manager 34 Conclusion 35

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Introduction to Company

Universal was founded in 2004 with presence spanning all the key segments of the Indian real estate industry, namely the commercial, residential, retail and hospitality sectors. The Company’s operations encompass various aspects of real estate development, such as land identification and acquisition, project planning, designing, marketing and execution with the customer as the focal point of the company.

Universal Buildwell Pvt. Ltd has an impressive portfolio of projects, which exhibits their strong leadership status as a pioneer and trendsetter in the Real Estate Sector.

Within a span of 11 years, Universal Buildwell Pvt. Ltd has awarded many residential, commercial, retail projects and many other business parks and tech parks. Some of the appreciable projects of Universal Buildwell Pvt. Ltd include Universal Trade Tower, Universal Aura, Universal Greens, Universal Pavilion, Universal Square and Universal Market Square.

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Introduction to Project

A new neighborhood as it takes shape is all set to redefine contemporary urban living in Gurgaon. Universal Aura is an elegant compilation of the finest set of high-rise residences that are a perfect blend of comfort and convenience. Ambitious, iconic & dynamic, these residential towers provide a unique mix of style and perfection. With excellent connectivity to NH-8 & IGI Airport and also the proximity of a Metro station ensures your home at Universal Aura is never too far from anything. Spread over 11 Acres of carefully crafted landscape the complex ensures an ecological twist to your urban living.

The premium residences are available in a choice of 2, 3 & 4 bedroom homes. Every home in Universal Aura has been created with your needs in mind, with spacious living room, large windows that allow maximum natural light and present stunning views of the landscape around. With only 4 apartments on each floor, you can be rest assured of your privacy. Each home affords itself with a secure car park as well. Imagine an iconic central plaza, just a few steps across your home – the club house at Universal Aura is the perfect place to entertain your family with a range of facilities like kids' play area, swimming pool, gymnasium, spa and several outdoor sports facilities. Apart from the superior facilities of the clubhouse, there is a super market, all offering a convenient and comfortable lifestyle.

With 24X7 power back-up and a 3 tier security system built as an integral part of the complex, you can be assured that you are never left in the dark and you & your family is always safe. For those who appreciate a lavish lifestyle surrounded by abundance of natural beauty, Universal Aura offers an unparalleled value and choice.

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PROJECT DETAILS

Living/ Dining Room

Flooring/ SkirtingMatt finished stain and abrasion resistant vitreous tiles / polished vitrified tiles.

Wall Finish Acrylic Emulsion on plaster.

Ceiling Oil bound distemper on plaster.

Lighting Standard makes and brands.

All Bedrooms

Flooring/ SkirtingMatt finished stain and abrasion resistant vitreous tiles / polished vitrified tiles.

Wall Finish Acrylic Emulsion on plaster.

Ceiling Oil Bound Distemper on Plaster.

Toilets

Flooring Matt Finished / Anti-Skid ceramic tiles.

Wall Finish

Glazed/Matt finished Ceramic Wall tiles up to DADO level (approx. 2100 mm).Oil Bound Distemper on plastered surfaces above DADO level.

Ceiling Finish Oil Bound Distemper on Plaster.

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Vanity Counter Indian Stone / Indian Marble.

Sanitary WareWash basin and European water closet (EWC) of standard makes & brands.

C.P. Fittings & Basin mixer, shower mixer / diverter with bath spout and overhead shower.

Accessories

Health Faucet along with necessary angle valves etc. of standard makes and brands.All toilet floors provided with suitable and adequate water proofing treatment.Provision for Installation.

Kitchen

Modular Kitchen Standard makes and brands.

Flooring/Skirting Matt finished ceramic tiles.

Wall Finish2’ high Ceramic Tiles dado above counter. Oil Bound Distemper over Plaster in remaining area.

Ceiling Oil Bound Distemper on Plaster.

Counter Polished Indian Granite or Marble.

Fixtures and FittingsStainless Steel Sink and mixer of standard makes and brands Provision for installation of Geysers.

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Balconies

Flooring Matt finished/anti-skid Ceramic Tiles.

Wall Finish Exterior grade paint on plaster.

Ceiling Finish Exterior grade paint on plaster.

Handrail and ParapetsCombination of parapet walls and M.S. Handrails as per the functional and elevation requirements.

External Wall Finish

External Wall FinishExternal grade Anti-Fungal / Anti algal paint from reputed makes & brands.

Servant room

Flooring Matt finished ceramic tiles.

Wall Finish Whitewash / Oil Bound Distemper on plaster.

Ceiling Finish Whitewash / Oil Bound Distemper on plaster.

Servant Toilet

Flooring Matt finished Ceramic Tiles

Wall FinishDado of glazed / matt finished Ceramic Wall Tiles. (Whitewash / Oil Bound Distemper on plastered surfaces above dado level for remaining areas.

Ceiling Finish Whitewash / Oil Bound Distemper on plaster.

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Sanitary WareWash basin and Indian water closet (IWC / Orissa pan) of standard makes.

C.P. Fittings & AccessoriesBib cock. Pillar Cock, Ablution tap along with necessary angle valves etc. of standard makes and brands.

Staircase

FlooringPolished Indian Stone/Indian Marble on Treads, Risers and Landings

Railing Painted M.S. Handrails and balustrades

Wall Finish Oil Bound Distemper on Plaster.

Common Passage

Flooring Polished Indian Stone/Indian Marble

Wall Finish Whitewash / oil bound distemper on plaster

Ceiling Finish Whitewash / oil bound distemper on plaster

Doors And Windows

Main Entrance Door Polished Hardwood frame with Polished flush Door Shutters

Internal Door Painted Hardwood frame with painted Flush Doors

HardwareLocks, Handles and Knobs (Mortise & Cylindrical Locks) from reputed makes and brands.High quality Steel / Brass Hardware.

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Windows & External GlazingPowder Coated Aluminum Frame or UPVC frame Windows with clear glass.

External Wall Finish

External Wall FinishExternal grade anti-fungal / anti-algal paint from reputed makes and brands

Electrical Wiring And Installation

Fixtures and FittingsIS Compliant Modular Switches / Sockets, Distribution Boxes and Circuit breakers from standard makes and brands.

WiringIS Compliant Copper wiring in Concealed conduits.Adequate provision for light points, fan points, receptacles and power in all rooms.

PointsElectrical points for Exhaust Fans in Kitchen & ToiletsElectrical points for Air-conditioners provided in appropriate locations in Bedrooms and Living Room.

Plumbing

IS Compliant CPVC water supply pipes with standard valves and accessories IS Compliant PVC waste pipes and traps. UPVC pipes are also used for solid waste & drain water pipe.

Fig. 1.1- Projected Plan

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Fig. 1.2- Floor Plan of Tower F

Fig. 1.3- Door, Window and Shaft Schedule

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BUILDING MATERIALS

A building structure is composed of different types of the material these materials are called as building materials. The materials used in the building are on basis of the availability and cost. To construct a building the essential building material are as follows:

Cement

The cement, often called the magic power is a fine ground material consisting of compound of lime, silica, alumina and iron. When mixed with water it forms a paste which hardened and bind the aggregates (sand, gravel, crushed rock, etc.) together to form a durable mass called as concrete.

Cement is the binder that holds concrete and mortars together. That is why it plays the most critical role in giving strength and durability to the building. Cement used for residential building is basically of three types :

Portland Slag Cement:

Conforming to IS:455, it is a combination of good quality blast furnace slag from the iron steel industry with clinker.

Portland Pozzolana Cement:

Conforming to IS: 1489, it is a combination of fly ash (from thermal power plant) with clinker and gypsum. Pozzolana cement is prepared by grinding Portland cement clinker with pozzolana. This type of cement is largely used in marine structure.

Ordinary Portland Cement:

33 grade conforming to IS: 269, 43 grade conforming to IS: 8112 and 53 grade conforming to IS: 12269. It is a combination of clinker and gypsum of good quality. Ordinary Portland cement is manufactured by first burning at a very high temperature the mixture of calcareous (mainly calcium carbonate) and argillaceous (mainly clay) and then grinding the product (i.e. clinker) with small amount of gypsum into a fine power known as Ordinary Portland Cement.

Ordinary Portland Cement of grade 43 has been used in all the works at the Aura Site.

Good quality cement has the following features:

Reduced water requirement

Improve Workability

Less permissible to moisture

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Improved resistance to acid and chlorides

Reduced heat of hydration

Easier to finish

Reduced shrinkage

Reduced leaching problems because it has low content of free lime

Sand

These are cohesionless aggregates of either, rounded sub rounded, angular, subangular or flat fragments of more or less unaltered rock of minerals consisting of 90% of particles of size greater than 0.06 mm and less than 2 mm. Alternatively, these are coarse grained cohesion less particles of silica derived from the disintegration of rock. The silt content in sand sample should be less than or equal to 8%. These are of three types:

Coarse sand

It is one which contains 90% of particles of size greater than 0.6mm and less than 2 mm

Medium sand:

It is one, which contains 90 & of particles of particles size greater than 0.2 mm and less than 0.6 mm

Fine sand

It is one, which contains 90% of particles of size greater than 0.06 mm and less than 0.2 mm. Proper selection of sand is critical in the durability and performance of concrete mixture. It should be: Clear, angular and hard, free from clay, mica and soft, flaky material graded, which means it should be a mix of fine, medium and coarse sand free from contaminates. Contaminants such as sea salt are consistent in moisture (water) content which should not exceed 7%.  When mixing concrete the moisture content must be taken into consideration.

The price of sand includes three or four components-base cost, transportation handling and number of Intermediaries. Procuring sand in bulk directly from the source will be cheaper. Your neighborhood dealer in this case is likely to be costlier, except when you need smaller quantities.

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Building Stone

Building stones are obtained from the rocks occurring in nature. The stones are used into construct the foundation, super structure and many of the building components. The various stones derived from these types of rocks are as follows:

Principal stones from igneous rocks:

Granite, Basalt and Trap.

Principal stones from sedimentary rocks:

Sand stone, Shale, Lime stone.

Principal stones from metamorphic rocks:

Quartzite, slate and marble.

Properties or requirement of good building stone:

a good building stone should possess several characteristics such as high strength (crushing strength>1000kg/cm ) ,high durability, sufficient hardness (coefficient of hardness>14) , high resistance to wear , good fire resistance ,specific gravity more than 2.7 , crystalline structure, high impact value(toughness index> 13) low water absorption (percentage absorption after 24hour less than 0.6), weather resistance and better appearance.

Bricks

Bricks are distinguished by their base (row) material and size. Standard brunt clay bricks come in the size 10" x 5" x 3". Modular bricks, rarely used because they are not easily available, come in the size 200mm x 100mm x 100mm(including mortar thickness) Fly ash bricks, sometimes also come in modularform.Conventional bricks have a frog (depressed / raised portion) on one of the larger surface bearing the Manufacturer’s brand . These also provide a good mechanical key for bonding (lock ability) with mortar. The modular bricks do not have the frog on them. Fly ash bricks exhibit almostsimilar mechanical properties as brunt clay bricks. Exposed brickwork with precise pointing is possible if the shapes are perfect.

Bricks used for the project are of Class A , size 230mm x 115mm x 75mm.

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Fig. 1.4 – Bricks used in constructing walls.

Aggregates

Aggregates is a general term applied to those inert (that chemically inactive) material, which when bounded together by cement, form concrete. Most aggregates used in this country are naturally occurring aggregates such as sand, crushed rock and gravel.

Aggregates for concrete are divided into three categories:

Fine Aggregates:

Most of which passes through 4.75 mm I.S. sieve and retained on 150 micron.

Coarse Aggregates:

Most of which passes through 63 mm I.S. sieve and retained on 4.75 micron. 

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All in Aggregate:

Mixed aggregate, as it comes from the pit or river bed. It is sometimes used for unimportant work without separating into different sizes.

Properties of Natural Aggregates:

The properties should comply with the norms laid down in IS: 38-1970 Specification for C.A. and F.A. from natural sources for concrete. Aggregates should be chemically inert, strong, hard, durable, of limited porosity (water absorption when immersed in water for 24 hours should not be more than 10%.),free from adherent coating, clay lumps, coal and coal residues and should contain no organic or other admixture that may cause corrosion of the reinforcementor impair the strength or durability of the concrete. The shape (rounded,irregular, angular and flaky) and sizes of the aggregates should conform to the strength and workability requirements.

Uses of the Aggregates:

Naturally occurring crushed stone aggregates can be used for producing any type of good concrete or R.C.C. for construction purpose .Broken brick aggregates is used to produce plain concrete but not suitable for R.C.C. which is lighter than broken stone aggregate. Air- cooled blast furnace slag, which is a by- product in the process of pig iron,forms a stronger and durable concrete when mixed with sand, and has a high fire resistance.

RCC stands for reinforced cement concrete. To enhance the load carrying capacity of the concrete it is reinforced with steel bars of different diameters provided in an appropriate manner. Such concrete is called reinforced concrete and the barsare called the reinforcement. These bars are provided at various locations toresist the internal forces, which are developed due to the loads acting on the structure.

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Reinforcement Steel

Reinforcing steel contributes to the tensile strength of the concrete. Concrete has low tensile, but high compressive strength. The tensile deficiency is compensated by reinforcing the concrete mass through insertion of twisted mild steel bars. Both branded and unbranded bars are available. It is wise to buy good brands the names of which are marked on the steel. During construction make sure that steel reinforcement is provided exactly as the engineering design specification.

Fig. 1.5 – Reinforcement and other fittings (MS Fan Box, PVC Conduit) in slab

Precautions:

Steel bars/rods should be responsibly clean and free of rust. Bars that cannot be easily bent manually or mechanically should be rejected. Optimum length bars must not be chosen to reduce wastage in cutting .To avoid laps, shorter bars must not be accepted Welded length of the bars should not be accepted

Fe 500 reinforcement steel has been used at Universal Aura Site.

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Water

The strength and durability of concrete depends also on the amount of water mixed with it. Too much or too little Water can adversely affect the strength of concrete. After concrete is cast, water is used to cure it so that the temperature is controlled and concrete matures slowly. It is very important to use clean, potable water in quality concrete production. Brackish or salty water must never be used. Contaminated water will produce concrete mortars with lower durability, erratic set characteristics and inconsistent colour. The ph of the water used for mixing of mortar/concrete should not have pH less than 6.

THE EFFECT OF AGGREGATE PROPERTIES ON CEMENT CONCRETE

Concrete is a mixture of cementitious material, aggregate and water. Aggregate is commonly considered inert filler, which accounts for 60 to 80% of the volume and 70 to 85% of the weight of the concrete. Although aggregate is considered inert filler, it is a necessary component that defines the concrete s thermal andelastic properties and dimensional stability. Physical and mineralogical properties of aggregate must be known before mixing concrete to obtain a desirable mixture. These properties include shape and texture, size gradation moistu- re content, specific gravity, reactivity, soundness, and bulk unit weight. These properties along with water /cementitious material ratio determine the strength, workability and durability of the concrete. The shape and texture of the aggregate affects the properties of fresh concrete more than hardened concrete .Concrete ids more workable when smooth and rounded aggregate is used instead of rough angular or elongated aggregate. Crushed stone produces much more angular and elongated aggregate, which have a higher surface to volume ratio better bond characteristics but require more cement paste to produce a workable mixture. The surface texture of the aggregate can be either smooth or rough. A smooth surface can improve workability yet a rougher surface generates a stronger bond between the paste and the aggregate creating a higher strength. The grading or size distribution of aggregate is an important characteristic because it determines the paste requirement for workable concrete. The requiredamount of the concrete paste is dependent upon the amount of void space mu-st be filled and the total surface area that must be covered. When the particlesare of uniform size the spacing is the greatest but when a range of sizes is used the void spaces are filled, the less workable the concrete becomes, therefore, a compromise between workability and economy is necessary. The moisture content of an aggregate is an important factor when developing the proper water/cementitious material ratio. The density of the aggregate isrequired in mixture proportioning to establish weight- volume relationships

 

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REINFORCED CEMENT CONCRETE

Plain concrete is very strong in compression but its tensile strength is only about 1/10 of the strength in the compression. So, the use of the plain concrete is limited to the structure in pure compression. Steel being equally strong in compression and tension, is, therefore, used to reinforce the concrete in a suitable way so that it can be used to build supporting structure where tension also develops. Concrete, thus reinforced is known as reinforced concrete .This combination is made because long steel bars can develops its full strength where it cannot carry equal amount of compressive force due to itsbuckling which is caused by the slenderness. Thus, the combination of concreteand steel bars has proved to be ideal, as the two material are used to resist the stresses for which they are most suitable.

Fig. 1.6-Columns of RCC at the AURA Site

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Properties of the reinforced cement concrete:

1) The concrete develops very good bond with the surface of the steel bars and, therefore the stresses are transferred from one material to the other which cannot resist individually.

2) The steel possesses a high tensile strength, a high modulus of elasticity and same coefficients of expansion and contraction as concrete. Due to equally near coefficients, no internal stresses are set up within reinforced concrete due to variation in temperature.

3) The coating of cement grout or paste on the surface of the reinforcement protects it from corrosion and at the same time it does not chemically react with the reinforcement.

Advantages of the reinforcement cement concrete:

It is overall economical in ultimate cost. Its monolithic character provides more rigidity to the structure. It is highly durable and fire resisting. It is not affected by the vermins termites fungus or such other insects. Well-compacted R.C.C. structure is impermeable to moisture penetration. Care and cost of maintenance of R.C.C. structure are almost negligible. The fluidity of the concrete and flexibility of reinforcement make it to possible to mould the R.C.C. members into variety of shapes desired.

Design philosophy

R.C.C. design of building is being carried out mainly by three methods of design. They are namely: (1) Working stress method (2) Ultimate load method and (3) Limit state method. The Limit state method is now is vogue in all government design office sand premier private consulting firms. The B.I.S. have published I.S.: 456-2000 incorporating the use of the Limit state method of design. The designer should therefore get well versed with the theory of Limit state method.

Limit State Method

is a judicious amalgamation of Working Stress Method and Ultimate Stress Method, removing the drawback of both of the method but retaining their good points. It is also based on sound scientific principles and backed by 25 year of research .The Limit State Method has proved to have an edge over the Working Stress Method from the economic point of view. Consequently we need no stick to Working Stress Method anymore. Besides analytical part of the structural design, following factors should also be kept in mind while designing the structure. a) Strength of structure. b) Durability of structure. c) Serviceability of structure during construction as well as during design life time of structure. d) Economy in building material and ease of constructions. e) Economy in centering and form work. f) Aesthetics of structure.

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PLAIN CEMENT CONCRETE

Plain Cement Concrete is a composite material used for construction of various civil engineering structures. It is obtained by mixing the basic ingredients such as cement, Fine aggregate (normally sand) and coarse aggregate (normally stone pieces) in required proportions. Water is added in the required measure and the mixture is put into a mechanical mixer to achieve concrete. Concrete is poured into the formwork (mould made up of plywood, steel plates and timber) to get the desired shape. It is then vibrated to achieve proper compaction (uniform denseness). High temperature is generated through chemical reaction in this process. Curing (control of temperature) with water is essential to achieve the desired strength of the concrete. Concrete gains compressive strength progressively with time. The strength achieved at the end of the 28 days is called the Characteristics Compressive Strength of the concrete and is designed as a Grade. About 60% of this strength is achieved at the end of the 7 days from the date of casting. Concrete continues to gain strength even beyond 28 days, albeit marginally .The form is subsequently removed.

Design Mix at Universal Aura Site –

PCC of Grades M-30, M-40 and M-45 were used at the site with different design mix.

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Fig. 1.7-Design Mix of M-40

Properties of Cement concrete

Strength of concrete:-

It should be have high compressive strength. The tensile and shear strengths are generally about 8 to 12% and 8 To 10% of their compressive strength respectively .The compressive strength of concrete is affected by several factors such as (a) Quality of the material and grading of the aggregates (b) Water(c) Water cement ratio (d) Cement content (e) Age of the concrete (f) Method of mixing placing compacting and curing.

Durability of concrete

The concrete possess a high durability value, as it is not much affected by atmospheric action. On the contrary, with the age, the concrete goes on hardening, thereby increase in the strength. It is this property, which gives this material a distinct place among the building material.

Elasticity of concrete

The concrete is not a truly elastic material and elastic modulus is effect by the strength, age, and moisture content of the concrete and the type of the aggregate used. The concrete undergoes an extra strain in addition to instantaneous strain on application of a load or stress, sufficient time. This extra strain is called creep of concrete and is permanent in character not recovered on the removal of load.

Shrinkage of concrete

The concrete has a tendency to shrink under following conditions:-

(a) There is initial shrinkage of cement concrete, which is mainly due to loss of water through forms, absorption by surface of forms.

(b) The shrinkage of cement concrete occurs as it is hardened. This tendency of shrinkage on one-hand causes cracks in concrete, while on the other, it grips the reinforcement tightly and hence proper bond between concrete and reinforcement when used in R.C.C. work. 

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Fig. 1.8– Door frame fixed with the help of hold fast in a block of concrete in 1:3:6

Fire resistance of concrete

Concrete is good insulator and has a fairly good fire resistance owing to thepresence of pores and also water.

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Workability

Workability is the most elusive property of concrete. A concrete is said to be workable if it can be easily mixed, Handled, transported, placed in position and compacted. A workable concrete should not show any segregation Or bleeding.The segregation is said to occur when the coarse aggregate tries to separate out from the finer material and this result in concentration of coarse aggregate at one place and fine material at another place in the mass concrete. The segregation creates larger void sand reduces the durability and strength both. The bleeding of concrete is said to occur when excess water comes up at the surface of the concrete. This causes the undesirable small pores through the mass of the concrete. The workability of the concrete effected by many factors: -(a) Shape of the aggregates(b) grading and size of the aggregates(c) ratio and coarse and fine aggregates(d) efficiency of mixing(e) quantity of water and use of any mixture. For maximum strength, the desired workability of fresh concrete can be attained by the following measure: (i) The proportion of coarse aggregate may be reduced, because the finer is the grading, the greater will be the workability. (ii)The proportion of coarse aggregate may be reduced while on the other hand corresponding increases may be made in that of the finer aggregates. (iii) The process of mixing concrete can be repeated second time by use of the vibrator.

Water cement ratio

Water cement ratio is the ratio of the water in a mix (excluding waterabsorbed already by the aggregate) to the weight of cement their-in. water cement ratio is the most important factor governing the strength of concrete. The strength of the concrete depend mainly open the amount of cement and the amount of water in it. The correct quantity of water cement ratio required for a particular mix depends upon various factors such as mix proportions, type and grading of aggregate, method of compaction applied and weather condition.

On the other hand workability of a concrete mix increases as the water content or water cement ratio of mix increased, because the water lubricate the mixture. But, at the same time increases in water content deceases the strength. Excess of water, further weaken the concrete, produces shrinkage cracks and decreases density.

Manufacture of the PCC

In the manufacture of concrete, it is almost important to ensure that a concrete of predetermined proportion is continuously placed in position in such a way that each batch almost like the other batches as far as possible.

Batching of the concrete

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After fixing the proportion of different ingredients of concrete for a particular work, the material C.A., F.A., cement and water measured out in batches for mixing. The process is known as Batching. This process of batching may be carried out by weight or by volume.

(i) Weight batching: -

The unit of weight, for material of concrete, is usually Kilogram. The batching of material by weight is absolutely straightforward,the cement, sand and coarse aggregate being all weighed directly in Kilogram.

(ii) Volume batching: -

In batching by volume, all ingredient i.e. water, cement, sand and coarse aggregate are measured in liters, where the resulting concrete (being) solid measured in cubic meters.

Mixing of concrete

Mixing of concrete may be carried out by hand or machine (by using a mechanical mixture) but the mixing by machine is always preferred.

(i)Mixing by hand: - In this, mixing carried out by hand on a clean, hard and water tight platform .Firstly cement, sand, aggregate are mixed by hand with the help of the shovel and a desired quantity of the water added to it and mix properly. This type of mixing carried out in the small work and unimportant work.

(ii) Mixing in machine: The machine used for mixing concrete is known asmechanical concrete mixer. There are two main type of concrete mixer is commonly use namely:

Continuous mixers are used in massive construction such as dams, bridges, etc., which involve the use of large masses of concrete and also required the continuous flow of concrete.

Batch mixer is most commonly used and consisting of a revolving drum with blades or baffles inside it. In batch mixer, all the material of desired proportioned mix are fed into the hopper of the revolving drum on being rotated at a certain speed mixes the material with the aid of a series of blades providing inside, the resulting mix is finally discharged from the drum and conveyed for used.

Transporting the concrete

Transporting the concrete mix is defined as the transferring of concrete from the mixing plant to the construction site. Keep in mind that not all concrete is mixed on the actual construction site and could require some significant travel. This is most common for ready mixed concrete. The main objective in transporting concrete is to ensure that the water cement ratio, slump or consistency, aircontent, homogeneity are not modified from there intended states. The concrete is transported commonly by the steel pipes.

Placing and finishing of concrete

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Mixing, transporting, and handling of concrete should be carefully coordinated with placing and finishing operations. Concrete should not be deposited more rapidly than it can be spread, struck off, consolidation, and bull floated. Concrete should be deposited continuously as near as possible to its final position. In slab construction, placing should be started along the perimeter at one end of the work with each batch placed against previously dispatched concrete. Concrete should not be dumped in separate piles and then leveled and worked together; nor should the concrete be deposited in large piles and moved horizontally into final position.

Consolidation

In some types of construction, the concrete is placed in forms, and then consolidated by temp. The consolidation compacts fresh concrete to mold it within theforms and around embedded items and reinforcement and to eliminate stonepockets, honeycomb and entrapped air. It should not remove significant amount of intentionally entr- ained air.

Vibration

Either internal or external is the most widely used method for consolidating concrete. When concrete is vibrated, the internal friction betweenthe aggregate particles is temporarily destroyed and the concrete behave like a liquid; it settles in the forms under the action of gravity and the large entrapped air voids rise more easily to the surface. Internal friction is re-established as soon as vibration stops.

Finishing

Concrete that will be visible, such as slab like driveway, highway or patios often need finishing. Concrete slabs can be finished in many ways, depending on the intended service use. Options include various colors and textures, such as exposed aggregate or a patterned stamped surface. Some surface may require only strike off and screeding to proper contour and elevation, while for other surface a broomed, floated, or troweled finish may be specified. In slab construction screeding or strike off is the process of cutting off excess concrete to bring the top surface of the slab to proper grade. A straight edge is moved acrossthe concrete with a sawing motion and advanced forward a short distance with each movement.

Bull floating eliminates high and low spots and embeds large aggregate particles immediately after strike off. This look like a long handled straight edge pulled across the concrete. Joining is required to eliminate unsightly random cracks. Construction joints are made with a groover or by inserting strips of plastic, wood, metal, or performed joints material into the unhardened concrete. Saw cut joints can be made after theconcrete is sufficiently hard or strong enough to prevent the reveling. Afterthe concrete has been jointed it should be floated with a wood or metal handfloat or with a finishing machine using float blades. This embeds aggregateparticles just beneath the surface; removes slight imperfections, humps, and voids; and compacts the mortar at the surface in preparation for addition finishing operations. Where a smooth, hard, dense surface is desired, floating shouldbe followed by steel troweling. Troweling should not be done on a

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Surface that has not been floated; troweling after only bull floating is not an adequate finish procedure. A slip resistant surface can be produced by brooming before the concrete has thoroughly hardened but it should be sufficient hard to retain the scoring impression.

FORMWORK

‘Temporary Supporting Structures’ are those structures, which are temporarily required in building construction either for supporting the laying of concrete till it gets matured, such as formwork or forms or shuttering . As fresh concrete is in a plastic state, when it is placed for construction purposes, so it becomes necessary to provide some temporary structure to confine and support the concrete, till it gains sufficient strength for self-supporting. The temporary structure is known as Formwork or shuttering.

Conventional Shuttering has been used at Universal Aura Site.

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Fig. 1.9– Formwork and Shuttering provided at the Aura site

Requirement of the formwork

Good forms for concrete structure should satisfy the following requirements; (1) It should be strong enough to resist the pressure or the weight of the fresh concrete and the superimposed loads due to equipment, men etc. This requires careful design of formwork, because the consideration of overloads will affects the economy whereas of under loads may cause failure of the forms work.(2) It should be rigid enough to retain the shape without undue deformation.(3) It must be made or constructed so light that it does not allow the cement paste to leak through the joints.(4) The inside surface of the formwork should be smooth so as to give good appearance to the resulting concrete surface. To achieve this, the inside surface of formwork is usually applied with crude oil or soft soap solution. This also facilitates the removal of the formwork.(5) The entire formwork should be so made that it can be removed easily without causing the least injury to the surface or edges of the concrete.(6) It should be made economical by reducing the cost through proper design, construction and use of formwork.

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Removal of the formwork

The period for which forms should be left in place depends upon the temperature of air, the shape and position of structural member (i.e. horizontal vertical or inclined), the nature of the loads likely to come and the character of the cement and cement paste. Generally, the use of rapid hardening cement, higher temperatures, low water cement ratio and lighter loads, will permit early removal of formwork. Under normal conditions where temperature is above20ºC and ordinary cement is use, forms may be removed after the expiry of the period given below: Particulars of the structural period of member removing of formwork (a) Vertical slides of slabs, beams 24 to 48 hours columns and wall(b) Slabs (props or vertical supporting 3 days member left under)(c) Beams soffits (props left under) 7 days(d) Bottom of slabs up to a span 7 days of 4.5 m.(e) Bottom of slabs above 4.5 m 14 days span, bottom of the beams up to 6 m span, and bottom of arch ribs up to 6 m span(f) Bottom of beams over 6 m span 21 days and bottom of arch ribs over 6 m span.

ONGOING WORK

Layout of the Floor Partitions- Tower F 12th Floor Layout

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Fig. 1.10– Layout for Partition Wall

Masonry Wall Construction

Masonry walls are the most durable part of any building or structure. They provide strength,,

durability to the structure and also helps to control indoor and outdoor temperature. It separates a

building from outside world.

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Masonry is the word used for construction with mortar as a binding material with individual

units of bricks, stones, marbles, granites, concrete blocks, tiles etc. Mortar is a mixture of

binding material with sand. Binding materials can be cement, lime, soil or any other.

The durability and strength of masonry wall construction depends on the type and quality of

material used and workmanship.

Mortar Ratio used for 4 Inches wall is 1:4 and for 9 Inches wall is 1:6.

Fig. 1.11– Masonry Wall Construction

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Fig. 1.12– Masonry Wall till Cill Level

Fig. 1.13– Masonry Wall completion

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Wall Alignment Check

Walls are checked for proper alignment angular or straight.

Fig. 1.13– Masonry Wall Alignment Check

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DUTIES OF PROJECT MANAGER

Residential construction site managers (RCSM) plan, organize, direct, control and evaluate residential construction projects from start to finish according to a schedule, specifications and a budget. This occupation includes coordinating the work of many skilled tradespersons and suppliers. Residential construction site managers play a significant role in planning and implementing quality control for home construction, jobsite safety and in ensuring current building code requirements are followed. The scope of work is limited to wood frame non-commercial buildings and residences up to four stories in height.

As the on-site representative of the prime contractor, the residential construction site manager is responsible for ensuring safety protocols, conditions and practices are met in accordance with current Occupational Health and Safety regulations, safety legislation and company policy.

The residential construction site manager implements a disciplined project management approach to construction activities utilizing administrative reporting, budgeting and scheduling skills to coordinate, track, report and monitor the activities and progress of construction projects.

The residential construction site manager’s responsive and positive working relationship with the home owner throughout the construction process and possession turnover is an important role in assuring homeowner satisfaction.

Fig. 1.14– Site Manager Instructing

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CONCLUSION

Under the guidance of Mr. Kapil Bhardwaj (Sr. Manager - Projects) as a mentor, we have got opportunity to understand the technical and managerial aspect of residential housing project.

The main aim of studies within this project was to investigate how a structure is constructed within its desired properties. We got to know about the basic & advanced techniques of building construction as well as saw the challenges which a civil engineer have to face during construction i.e. labor problems, cost management, environmental challenges etc. We cleared our many doubts regarding building construction. Overall it must be said that the construction methods and quality control on a residential project needs a very good coordination and large quantities of man power, equipment and funds. During the period of 30 days all the site staff helped us a lot to provide all the information about any query. So we are grateful to Universal Buildwell Pvt. Ltd for giving us the opportunity to learn and grow.

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