Q. For an ordinary Portland cement (Solved)
1. residual does not exceed 10% when sieved through is sieve no. 9
2. soundness varies from 5 to 10 mm
3. initial setting time is not less than 30 minutes
4. compressive stress after 7 days, is not less than 175 kg/cm2
- c. initial setting time is not less than 30 minutes