Civil Engineering MCQAE Level Civil Engineering
As per IS 3495 Part 2, the water absorption of first class bricks after 24 hours of immersion should not exceed:
Building MaterialsBrick Absorption IS 3495MEDIUM
Choose the correct answer
A
10% by mass
B
20% by mass
C
30% by mass
D
5% by mass
Correct Answer
B. 20% by mass
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IS 3495 water absorption limits: First class bricks: not more than 20% (by mass); Second class: not more than 22%; Third class: not more than 25%. Bricks are dried at 105-115 deg C, weighed dry, then immersed in water for 24 h and reweighed. Absorption = (wet - dry)/dry x 100%.
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