search
arrow-left Previous
Next arrow-right
Q: Which of the following compounds of Portland cement reacts immediately with the water and set early? Which constituent of the cement, upon addition of water, sets and hardens first? In ordinary Portland cement, the first one to react with water is:
  • A. Dicalcium silicate
  • B. Tetracalcium aluminoferrite
  • C. Tricalcium aluminate
  • D. Tricalcium silicate
Correct Answer: Option C - Portland cement have following 4 Bogue's component:– (1) Tricalcium aluminate (C₃A) – Responsible for flash setting (2) Tetracalcium alumino ferrite (C₄AF) – No engineering significance (3) Tricalcium silicate (C₃S) – Development of early strength. (4) Dicalcium Silicate (C₂S) – Responsible for progressive strength.
C. Portland cement have following 4 Bogue's component:– (1) Tricalcium aluminate (C₃A) – Responsible for flash setting (2) Tetracalcium alumino ferrite (C₄AF) – No engineering significance (3) Tricalcium silicate (C₃S) – Development of early strength. (4) Dicalcium Silicate (C₂S) – Responsible for progressive strength.

Explanations:

Portland cement have following 4 Bogue's component:– (1) Tricalcium aluminate (C₃A) – Responsible for flash setting (2) Tetracalcium alumino ferrite (C₄AF) – No engineering significance (3) Tricalcium silicate (C₃S) – Development of early strength. (4) Dicalcium Silicate (C₂S) – Responsible for progressive strength.