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For rapid hardening cement minimum cube strength in a work test is taken as strength at

A2 days

B7 days

C14 days

D28 days

Answer:

B. 7 days

Read Explanation:

High early strength is achieved by rapid hardening cement(RHC) so formwork can be removed earlier dates, i.e., in 3 days achieving 7 days strength of OPC. For mass concreting to avoid high amount of heat Low heat cement used. Concreting under or running water quick setting cement is used due to its quick action.


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