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Q: In fineness test of rapid hardening Portland cement the residue on I.S. sieve No. 9 should not be more than
  • A. 0.01
  • B. 0.05
  • C. 0.1
  • D. 0.15
Correct Answer: Option B - Rapid hardening cement attains it's strength rapidly than normal cements. The strength of this cement at the age of 3 days is equal to the 7 days strength of ordinary Portland cement, with same water cement ratio. It's residue by weight is not to be exceed 5% when sieved through IS sieve number 9.
B. Rapid hardening cement attains it's strength rapidly than normal cements. The strength of this cement at the age of 3 days is equal to the 7 days strength of ordinary Portland cement, with same water cement ratio. It's residue by weight is not to be exceed 5% when sieved through IS sieve number 9.

Explanations:

Rapid hardening cement attains it's strength rapidly than normal cements. The strength of this cement at the age of 3 days is equal to the 7 days strength of ordinary Portland cement, with same water cement ratio. It's residue by weight is not to be exceed 5% when sieved through IS sieve number 9.