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Q: The setting and hardening of cement paste is mainly due to the hydration and hydrolysis of
  • A. Tri calcium silicate
  • B. Tetra calcium alumina ferrite
  • C. Di calcium silicate
  • D. Tri calcium aluminates
Correct Answer: Option D - When water is added to cement, there is hydration action in it, which becomes paste when water is added. After some time. The solidification and compaction of cement are both separate process. In cement, firstly tricalcium aluminate and tetracalcium alumina ferrite are formed and provide hardening to cement.
D. When water is added to cement, there is hydration action in it, which becomes paste when water is added. After some time. The solidification and compaction of cement are both separate process. In cement, firstly tricalcium aluminate and tetracalcium alumina ferrite are formed and provide hardening to cement.

Explanations:

When water is added to cement, there is hydration action in it, which becomes paste when water is added. After some time. The solidification and compaction of cement are both separate process. In cement, firstly tricalcium aluminate and tetracalcium alumina ferrite are formed and provide hardening to cement.