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State whether the following is true or false.
Gypsum is formed in the kiln along with the other clinker compounds.

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

Answer: C

It is interground with the cooled clinker afterwards, precisely because its purpose is to control the reaction of a compound the kiln has already made. Adding it before burning would defeat that purpose. Gypsum would decompose at kiln temperatures in any case.

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