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State whether the following is true or false.
Cement without added gypsum would set too slowly to be useful.

  • A.True
  • B.False
  • C.True only at large scales
  • D.False only at small scales

Answer: B

It would set far too quickly, flash setting within minutes as the tricalcium aluminate reacts. Gypsum is a retarder, so its absence accelerates rather than delays the set. A cement flash setting in the mixer would be useless on site.

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