Which of the following materials falls under the category of rigid materials when checking the dampness of a material?
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ANSWER= [A] Cement Concrete
Explain:- Correct answer for question Which of the following materials falls under the category of rigid materials when checking the dampness of material is (A) Cement Concrete
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Damp Proofing of foundation is necessary to prevent the capillary rise of water in the wall and also in the Ground floor.
Material is commonly used for damp proofing are described below
Flexible Material
The flexible materials like hot bitumen, bituminous felt, plastic sheet, a metal sheet of lead, copper etc.
Semi-rigid Material
The materials like mastic asphalt and other combination of impervious materials
Rigid Material
It is impervious bricks, stones, slates, cement concrete or cement mortar pointed with bitumen etc
Cement concrete layer of 1:2:4 mix with waterproofing agent is used as P.P.C. which doesn’t permit the rise of water by capillary action but allows water to pass through the cracks which occur in this layer due to shrinkage or minor settlement of buildings.
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