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Q: As per IS 456:2000, pH of water used for mixing and curing the concrete should be:
  • A. 6.5 to 8.5
  • B. Not less than 6.0
  • C. 7.0
  • D. Highly acidic
Correct Answer: Option B - As per IS : 456-2000, clause 5.4.2. The pH value of water shall be not less than 6, which is used in concrete work.
B. As per IS : 456-2000, clause 5.4.2. The pH value of water shall be not less than 6, which is used in concrete work.

Explanations:

As per IS : 456-2000, clause 5.4.2. The pH value of water shall be not less than 6, which is used in concrete work.