Which principal compound of Portland cement contributes most to early strength development?
Correct answer: D. Tricalcium silicate
- A. Tetracalcium aluminoferrite
- B. Dicalcium silicate
- C. Tricalcium aluminate
- D. Tricalcium silicate
Explanation
Tricalcium silicate, or C3S, hydrates relatively quickly and provides much of the strength gained during the early days. Dicalcium silicate contributes more significantly to later strength.
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Concrete technology covers cement, aggregates, water and admixtures, including their properties, proportioning and effect on fresh and hardened concrete. It explains workability, water-cement ratio, setting, hydration, strength, durability, curing, mix design and common defects, while distinguishing segregation and bleeding from general loss of workability.
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