Question

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

• A. 2 days
• B. 7 days
• C. 14 days
• D. 28 days

Answer 1

Answer:

B. 7 days

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.