Answer / k bu babu

strength of the 1st class brick:105 kg/sq.cm
Water absorption in 24 Hrs.it should not be greater than 20%
of it weight.

Answer / snz1232003

COMP. STRENGTH 7.5N/SMM
WATER ABSORPTION <10.0%
SIZE AND SHAPE SHOULD BE EQUAL

Answer / rakesh gupta

these bricks have regular shape and size
. when struk with each other then produce a clear metallic ringing sound and it does not absorb water more than 20 percent by it's original weight

Answer / matiur rahaman

Testing required as per relevant I.S. Code.
1. Physical properties Test
2. Compressive strength

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