Question

In a concrete pavement
(A) temperature stress is tensile at bottom during day time
(B) load stress is compressive at bottom

• A. Both statement (A) and (B) are incorrect
• B. Statement (A) is wrong and (B) is correct
• C. Statement (A) is correct and (B) is wrong
• D. Both the statements (A) and (B) are correct

Answer 1

The correct option is C Statement (A) is correct and (B) is wrong

Day time : slab tries to contract at bottom but it is restrained by weight hence tension develops at bottom.

Hence load stress is tensile at bottom.

Note: Temperature stresses

Night time : slab tries to contract at top but weight tries to resist it hence tension develops at top.