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Q: Rapid hardening cement attains early strength due to ..........
  • A. Larger proportion of lime grounded finer than normal cement
  • B. lesser proportion of lime grounded coarser than normal cement
  • C. lesser proportion of lime grounded finer than normal cement
  • D. larger proportion of lime grounded coarser than normal cement
Correct Answer: Option A - Rapid hardening cement – Also known as early gain in strength of cement, this cement contain more percentage of C₃S and less percentage of C₂S high proportion of C₃S and lime grounded finer than normal cement will import quicker hydration. Rapid hardening Cement (8041) – • Larger proportion of lime grounded finer than in ordinary cement. • It is similar to ordinary portland cement but with higher C3S content and finer grinding. • High heat of hydration characteristics. • Initial setting time - 30 min. • Final setting time - 600 min • The high strength at early stage is due to finer grinding. • This cement attains strength at the age of 3 day, equipment to the strength of O.P.C. at 7 day.
A. Rapid hardening cement – Also known as early gain in strength of cement, this cement contain more percentage of C₃S and less percentage of C₂S high proportion of C₃S and lime grounded finer than normal cement will import quicker hydration. Rapid hardening Cement (8041) – • Larger proportion of lime grounded finer than in ordinary cement. • It is similar to ordinary portland cement but with higher C3S content and finer grinding. • High heat of hydration characteristics. • Initial setting time - 30 min. • Final setting time - 600 min • The high strength at early stage is due to finer grinding. • This cement attains strength at the age of 3 day, equipment to the strength of O.P.C. at 7 day.

Explanations:

Rapid hardening cement – Also known as early gain in strength of cement, this cement contain more percentage of C₃S and less percentage of C₂S high proportion of C₃S and lime grounded finer than normal cement will import quicker hydration. Rapid hardening Cement (8041) – • Larger proportion of lime grounded finer than in ordinary cement. • It is similar to ordinary portland cement but with higher C3S content and finer grinding. • High heat of hydration characteristics. • Initial setting time - 30 min. • Final setting time - 600 min • The high strength at early stage is due to finer grinding. • This cement attains strength at the age of 3 day, equipment to the strength of O.P.C. at 7 day.