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The stages of cement hydration in order are

  • A.deceleration, acceleration, dormant period, initial reaction
  • B.initial reaction, dormant period, acceleration, deceleration
  • C.dormant period, initial reaction, deceleration, acceleration
  • D.acceleration, dormant period, initial reaction, deceleration

Answer: B

A brief burst of reaction on wetting is followed by a quiet period of a few hours during which the concrete remains workable. Acceleration then sets in and the paste stiffens and hardens before the reaction slows again.

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