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The Le Chatelier test measures

  • A.the fineness of the finished ground cement
  • B.the heat that is evolved during hydration
  • C.soundness, through expansion of a split mould
  • D.the compressive strength at twenty-eight days

Answer: C

A split brass mould with indicator arms is boiled, and the separation of the arms records expansion caused by free lime. Excessive expansion means the cement will disrupt itself after hardening. The mould is boiled precisely to accelerate a reaction that is otherwise slow.

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