Question

The increased rate of strength gain of rapid hardening cement is achieved by

• A. higher content of $C_{3}S$
• B. higher content of $C_{3}A$
• C.
  finer grinding of cement
• D. both (a) and (c)

Answer 1

The correct option is D both (a) and (c)

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.