practical training omaxe pvt. ltd

8/2/2019 Practical Training Omaxe Pvt. Ltd

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PRACTICAL TRAINING


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SITES

OMAXE CITY JAIPUR

Executive Homez

Shubhangan


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CONTENTS

Detail of the sites.

My contribution

Materials used.

Tests for quality control.

Structural details.


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LOCATION OF THE SITE


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SPECIFICATION OF OMAXE CITY:

Provision for need based essential services like :banks, postal service, taxi stand, grocery store, etc.

Underground cables for telephone, electricitydistribution, storm water drains & sewer system

Efficient power distribution network

Regulated underground / overhead water supply

Township maintenance and upkeep by a reputedmaintenance agency

Rainwater harvesting for replenishing groundwater

Environment-friendly waste disposal

Sewage treatment and incinerators


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Executive Homez


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PLAN OF Executive Homez


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MY CONTRIBUTION AT SITE

Material and material testing.

Execute the site work according to drawings.

Casting of building components like slab, Beam ,

column, Staircase.

Layout of tie beams.


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Materials used at SITE CEMENT: It is a substance, which acts as a binding

agent for building construction materials.

The grades are- 33 grade

43 grade(IS 8112:1989) 53 grade

AGGREGATES: Aggregate is the material whichactually takes the load and are mixed with thecement to have concrete. These are of 2 types, fineand coarse aggregates. Fine aggregates are calledsand too.


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Materials continue..

REINFORCING STEEL: Reinforcing steelconsists of bars, usually circular in cross-

section.(Grade of steel Fe-415 ) Diameter: 8, 10, 12,16,25,32 mm diameter bars

are used in:-

Beams

Columns Slabs


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Concrete

CONCRETE: An artificially made material obtainedby mixing aggregates, cement and water in somespecific proportion. Two types of concrete were

used : Nominal concrete mix (in the PCC only) and it was

of grade M15.

Design concrete mix :-I(S 10262-2009) At site prepared (in columns and footings only) and it

was of grade M30.

At plant prepared(in slabs and beams only) and it was of

grade M25


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Design concrete mix

(at plant prepared)


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RMC CONTINUE..

Some basic quality of RMC(IS 4926:2003):- It should be delivered in between a proper time

given by plant provider

It should maintain proper quality as that required atthe site.

Different kind of admixture should be used tomaintain the concrete.

Admixture used at site was Sika rapid 1containing no chlorides and nitrites which

accelerates the setting .


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Tests done for concrete at site

Slump test :-

Used for the measurement of a property of freshconcrete

The test is an empirical test

Compressive strength:-

To determine the characteristic strength of the

concrete Very important to the acceptance of in-situ concrete

work since it demonstrates the strength of thedesign mix.


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SLUMP TEST OF WORKABILITY:-

Unsupported fresh

concrete ,flow to

the side and

sinking in theheight take place.

This vertical

settlement isknown as slump.


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SLUMP TEST CONTINUE..

Apparatus:-Iron pan, spatula, trowels, weighingplate form machine,tamping rod and graduated

cylider.


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Procedure:-Place the mix concrete in the clean slumped cone

mould in four layers.

Tamp each layer 25 times with tamping rod.

Strike off the top with a trowel.

Remove the cone immediately.

Measure the settlement of concrete in mm

which will a slump.


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Collapse Shear True

In a collapse slump the concrete collapses

completely.

In a shear slump the top portion of the

concrete shears off and slips sideways.

In a true slump the concrete simply

subsides, keeping more or less to

shape.


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Slump values according to code

Placing condition Degree of workability Slump (in mm)

Blinding concrete;

Shallow sections;

Pavements using pavers

Very low 150


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RESULT

DATE LOCATION GRADE OFCONCRETE SLUMP VALUE(mm)

23-05-2011 T-3 M-25 7930-05-2011 T-3 M-25 8506-06-2011 T-3 M-25 8813-06-2011 T-4 M-25 7420-06-2011 T-4 M-25 7627-06-2011 T-4 M-25 7504-07-2011 T-4 M-25 8011-07-2011 T-4 M-25 78


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Compressive strength test

Apparatus :- 150 mm cube moulds,ramming

rod ,mixer, weighing machine,universial

testing machine,buckets,Base plate.

Style of putting cube was perpendicular to

the filling style.

Test was done after 7 days and 28 days.


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Procedure:-

(1)Pour concrete in the moulds oiled with a medium

viscosity oil.

We are using motor vehicle oil for this purpose .


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(3) Fill concrete in the moulds in two layers each

of 75 mm.(4) With 35 blows evenly distributed over the

surface of layer.


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(5) Struck off concrete flush with the top of the

moulds.(6) Curing:-Specimen are removed from the moulds

after 24 hours and cured in water for 28 days.

28 days


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Concrete DATE Days Load(avg ofthree values)

in KN

Strength(N/mm2)

Strength(N/mm2)(avg.)

M25(Sample) 30-05-2011 7 445 19.77

380 16.88 18.29

410 18.22

28 570 25.33

580 25.77 25.92

585 26

Compressive test Results


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Sand silt test

Object:-get an ideaof the amount of

silt in a natural sand.


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Procedure

First make a salt-water solution by putting one teaspoon of saltinto 1/2liter of water.

Put this solution into the measuring cylinder, up to the 50 ml

mark.

Next pour in the sand until the level of the sand is up to the 100ml mark. Add more salt water until the water reaches the 150 ml

mark.

cover the cylinder and shake it well. Stand the cylinder on a

level surface and tap it gently until the top surface of the sand is

level.

Leave it to settle for 3 hours and then measure the height of the

silt layer on top of the sand.

This should be no more than about 6 ml, or about 6% of the

total amount of sand.


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RESULT

DATE LOCATION VOLUME OFSAND (ml)

VOLUME OF SILT (ml) SILT PERCENTAGE

30-05-11 T-5 390 8 2.05

03-06-11 T-5 405 9 2.22

06-06-11 T-4 395 7 1.772

12-06-11 T-2 315 6 1.905

13-06-11 T-2 370 7 1.89

19-06-11 T-2 385 7 1.81


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FOUNDATION

Slopped foundation(trepezoid footing) was

used.

It is the type of spread footing which comeunder sallow foundation.


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Colum casting

ConcreteM30

Prepared at site only, NO CONCRETE FROM

ISOLATED PLANT DUE TO ECONOMY

Reinforcement Main Reinforcement : 25 mm, 32mm

Tie Bars : 8 mm


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Slab Casting

Concrete M25

RMC Concrete from offsite plant

ReinforcementMain reinforcement : 10 mm & 12 mm

Distribution reinforcement : 8mm

Cranks provided according to BMD in design

to cater negative moment due to fixed support.Concrete blocks provided : Thickness = cover

Chairs of 10 mm bar


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Slab Casting continue..

ConcretingConcrete was pumped by assembly of pipes.

Once it was pumped on slab Reinforcement

cage, it was vibrated to prevent segregation of

concrete and to ensure uniformity in concrete of

slab.


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Beam Casting

Beam is designed for flexure and shear.

Concrete M25

Prepared at RMC Plant. Transported and pumped to

beam.

Reinforcement 20and25 mm bars for main reinforcement, and 8

mm bar for stirrups(shear reinforcement).


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