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Q. |
For an ordinary Portland cement |
A. | residual does not exceed 10% when sieved through is sieve no. 9 |
B. | soundness varies from 5 to 10 mm |
C. | initial setting time is not less than 30 minutes |
D. | compressive stress after 7 days, is not less than 175 kg/cm2 |
Answer» C. initial setting time is not less than 30 minutes |
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