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Magnesium oxychloride cement, also called Sorel cement, is made by mixing magnesia with

  • A.ordinary water alone
  • B.a solution of calcium hydroxide
  • C.finely ground Portland clinker
  • D.a solution of magnesium chloride

Answer: D

The resulting binder is hard and takes a good polish, which made it popular for industrial flooring and for artificial stone. Its serious weakness is poor resistance to water, which restricts it to protected interior use.

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