summer training in kmc

8/3/2019 Summer Training in KMC

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Summer Training in

KMC Constructions Ltd.

Presented By-

Gangaram Sapkota

Bibhuti B. Bhardwaj

Sanjib Baruah


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Name of the project:

Widening & Strengthening of Existing National

Highway from 2 Lane to 4 Lane in Sonapur-

Dharampur section of NH-37 in Assam.

Client: National Highway Authority of India

Engineer: RITES Ltd.

Contractor: KMC Constructions Ltd.


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The rocks are obtained from the blasting site.

At the blasting site using dynamites boulders

are disintegrated.

Those are carried to the crusher in dumpers.

In the crusher they are crushed to relatively small

sizes.

Crusher


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In the Batching plant mainly concrete and bitumen are

batched and prepared in some huge computer aided

mixers.

Required quantities of different ingredients to be

mi

xed are fi

xedi

n the computer then machi

nes wi

llautomatically mix all the ingredients and the product is

poured into the dumpers.

Batching Plant


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Sieves of various sizes such as 10 mm, 20 mm,

40mm etc sieve the aggregates.

Conveyor belts carry them and deposit separately

with respect to their sizes.

These help the batching plant fellows to get it

conveniently.


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Rigid pavement

As the name implies, rigid pavements are rigid i.e.

they do not flex much under loading like flexible

pavements.

They are constructed using cement concrete.

Rigid slabs are casted with the help of a very big as

well as expensive machine called PQC Paver.

The word PQC stands for Pavement Quality

Concrete.


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Rigid Pavement

GSB (granular sub base)- 200mm,

DLC (Dry Lane Concrete)- 150mm ,

PQC (pavement quality concrete)- 300mm


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Flexible pavements are so named because the total

pavement structure deflects, or flexes, under loading.

A flexible pavement structure is typically composed

of several layers of materials.

Each layer receives loads from the above layer,

spreads them out, and passes on these loads to the

next layer below.

Flexible Pavement


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Flexible Pavement

Sub-grade- 500mm CBR:-7%

Drainage Layer for Drainage -125mm

GSB (Granular Sub Base) 125mmWMM (Water Mix Macadam)- 125mm each- 2 layers,

Prime Coat- 6-9 kg/10 m2 ,

Tack Coat- 2.5 kg/10 m2 ,

BM (bituminous macadam)- 75mm

DBM (Dense Bituminous Macadam) 125mm (Layer I- 65mm & Layer II- 60mm)

Tack Coat 2.5kg/10m2 (Necessary only if time duration is more than 24hours) ,

BC (Bituminous Course)- 50mm


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Broomer: For Cleaning the dust in order to obtainproper binding of bitumen with aggregates.

Dowel bars: It is used to transfer the load from oneslab to the other. Diameter-35mm, Length- 500mm.

Tie bars: It just holds two slabs firmly together.Diameter- 12mm, Length- 600 mm.

Some Terms used in the field


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Broomer

Kerb SettingMachine


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Tie Bars inposition

Shutteringplates


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Batching Plant

Weep hole


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summer training in kmc

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