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Q: Which of the following ingredients is found in high content in rapid hardening cement which results in shortening the final setting time?
  • A. Lime
  • B. Silica
  • C. Sulphates
  • D. Alumina
Correct Answer: Option A - Rapid hardening cement:– It has high lime content and can be obtained by increasing the tri-calcium silicate and finer grinding of OPC. Initial setting time:– 30 min. Final setting time:– 10 hrs
A. Rapid hardening cement:– It has high lime content and can be obtained by increasing the tri-calcium silicate and finer grinding of OPC. Initial setting time:– 30 min. Final setting time:– 10 hrs

Explanations:

Rapid hardening cement:– It has high lime content and can be obtained by increasing the tri-calcium silicate and finer grinding of OPC. Initial setting time:– 30 min. Final setting time:– 10 hrs