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A _________ layer is in proportion 1:2:4 is generally provided at the plinth level to work as a damp proofing course.

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A _________ layer is in proportion 1:2:4 is generally provided at the plinth level to work as a damp proofing course.

(a) Mortar

(b) Cement concrete

(c) Stone

(d) Brick

I have been asked this question in an international level competition.

This key question is from Dampness topic in portion Damp Proofing, Water Proofing and Termite Proofing of Construction & Building Materials

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Right answer is (b) Cement concrete

The best I can explain: The depth of cement concrete layer varies from 40 mm to 150 mm. It stops the rise of water by capillary action and it is found to be effective at places where them is not excessive.

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