Question

__________ absorbing water less than 4.50% of their weight can be used for Damp proofing.

(a) Bricks

(b) Mortar

(c) Stones

(d) Cement concrete

This question was posed to me in a national level competition.

I'd like to ask this question from Dampness in section Damp Proofing, Water Proofing and Termite Proofing of Construction & Building Materials

Answer 1

Correct answer is (a) Bricks

To explain: The dense Bricks, absorbing water less than 4.50% of their weight, can be used for damp proofing at places where damp is not excessive. The joints are kept open. Such bricks are widely used when damp proofing courses to be inserted in an existing wall.