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Q: Which of the following chemical compounds is a Bogue's compound present in cement and is responsible for the strength of cement?
  • A. 5 CaO.Al₂O₃.K₂O
  • B. 2CaO.Sio₂.Fe₂O₃
  • C. 2CaO.SiO₃
  • D. 3CaO.SiO₂
Correct Answer: Option D - Tricalcium silicate (C₃S)– It is responsible for initial strength. Dicalcium silicate (C₂S)– It is responsible for progressive strength by slow hardening and releasing less heat of hydration. Tricalcium aluminate (C₃A)– It is responsible for flash set. It is generate high heat. Tetracalcium alumino ferrite (C₄AF)– It is responsible for flash set but generates less heat.
D. Tricalcium silicate (C₃S)– It is responsible for initial strength. Dicalcium silicate (C₂S)– It is responsible for progressive strength by slow hardening and releasing less heat of hydration. Tricalcium aluminate (C₃A)– It is responsible for flash set. It is generate high heat. Tetracalcium alumino ferrite (C₄AF)– It is responsible for flash set but generates less heat.

Explanations:

Tricalcium silicate (C₃S)– It is responsible for initial strength. Dicalcium silicate (C₂S)– It is responsible for progressive strength by slow hardening and releasing less heat of hydration. Tricalcium aluminate (C₃A)– It is responsible for flash set. It is generate high heat. Tetracalcium alumino ferrite (C₄AF)– It is responsible for flash set but generates less heat.