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Concrete Technology
For an ordinary Portland cement
residual does not exceed 10% when sieved through IS Sieve No. 9
soundness varies from 5 to 10 mm
initial setting time is not less than 30 minutes
compressive stress after 7 days, is not less than 175 kg/cm2
all the above.
Correct Answer:
initial setting time is not less than 30 minutes
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