Question

A good quality cement should have higher percentage of

• A. Sand
• B. Silica
• C. both (a) and (b)
• D. Tricalcium Silicate

Answer 1

The correct option is D Tricalcium Silicate

A higher percentage of $C_{3}S$ results in rapid hardening with an early gain in strength releasing higher heat of hydration. On the other hand a higher % of $C_{2}S$ results in slow hardening, lesser heat of hydration and greater resistance to chemical attack.