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Q: According to IS-1077 (Specification common burn clay building brick), what is the limiting percentage of water absorption for class 25 bricks?
  • A. 5%
  • B. 10%
  • C. 15%
  • D. 7%
Correct Answer: Option C - Water absorption as per IS : 1077-1992 (Clause 7.2)– The bricks, when tested in accordance with the procedure laid down in IS : 3495 (Part-2) : 1992 after immersion in cold water for 24 hrs. water absorption shall not be more than 20% by weight upto class 12.5 and 15% by weight for higher classes.
C. Water absorption as per IS : 1077-1992 (Clause 7.2)– The bricks, when tested in accordance with the procedure laid down in IS : 3495 (Part-2) : 1992 after immersion in cold water for 24 hrs. water absorption shall not be more than 20% by weight upto class 12.5 and 15% by weight for higher classes.

Explanations:

Water absorption as per IS : 1077-1992 (Clause 7.2)– The bricks, when tested in accordance with the procedure laid down in IS : 3495 (Part-2) : 1992 after immersion in cold water for 24 hrs. water absorption shall not be more than 20% by weight upto class 12.5 and 15% by weight for higher classes.