________________ is the major constituent of the Portland cement?
Correct answer: C. Tricalcium silicate
- A. Calcium carbonate
- B. Calcium oxide
- C. Tricalcium silicate
- D. Calcium sulphate
Explanation
Tricalcium silicate, C3S, is the principal clinker phase responsible for early strength development in Portland cement. Calcium carbonate is a raw material, while calcium sulphate is added mainly to control setting.
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