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Question
Water absorption of a good brick should NOT exceed of its dry weight when kept immersed in water for 24 hours-
fdlh Hkh vPNh bZaV dks 24 ?kaVksa rd ikuh esa Mqcks dj j[kus ij ty vo'kks"k.k vPNh bZaV ds lw[ks Hkkj ds -------- ls vfèkd ugha gksuk pkfg,A
A.
25%
B.
20%
C.
10%
D.
30%
Answer ( Option B)

20%

Solution

Calculation of Water Absorption of Bricks Water absorption, % by mass, after 24 hours immersion in cold water in given by the formula,
    
When tested as above, the average water absorption shall not be more than 20% by weight up to class 12.5 and 15% by weight for higher class.

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