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The principal reason cement is stored in dry conditions is that

  • A.moisture causes it to hydrate prematurely
  • B.damp cement becomes hazardous to handle safely
  • C.water dissolves out the gypsum entirely
  • D.humidity changes the colour of the paper bags

Answer: A

Even atmospheric moisture starts the reaction, forming lumps and reducing the strength the cement can later develop. Bags stored badly lose strength measurably within a few months. Lumps that cannot be crushed between the fingers indicate real damage.

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