Question

Rapid hardening cement attains early strength due to

• A. Larger proportion of clinker grounded finer than normal cement
• B. Lesser proportion of clinker grounded coarser than normal cement
• C. Lesser proportion of clinker grounded finer than normal cement
• D. Larger proportion of clinker grounded coarser than normal cement

Answer 1

The correct option is A Larger proportion of clinker grounded finer than normal cement

Rapid hardening cement as the name indicates it develops strength rapidly and it is also known as High Early Strength Cement. It has a higher proportion of limestone and shale (Clinker), which results in early high strength. It has a high proportion of tricalcium silicate (C3S) which boosts up the strength gain, in early stages due to higher heat of hydration. Shrinkage during curing and hardening of cement is less in case of RHC.