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The lime saturation factor of a cement raw mix expresses

  • A.the total mass of limestone quarried in a day
  • B.the proportion of gypsum added at the grinding stage
  • C.the fineness to which the finished clinker is ground
  • D.the lime present relative to the maximum combinable

Answer: D

Too high a value leaves free lime in the clinker, which causes unsoundness, while too low a value wastes potential strength. It is one of the principal controls on the raw mix. It is calculated from the oxide analysis before burning begins.

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