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Belite in clinker is chemically

  • A.calcium sulphate
  • B.dicalcium silicate
  • C.tricalcium silicate
  • D.tricalcium aluminate

Answer: B

It hydrates far more slowly than alite and supplies the strength gained after the first few weeks. Its proportion is raised deliberately in low heat cements where early strength matters less than heat evolution. Belite grinds harder than alite, which is one cost of raising its proportion.

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