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The specific surface required of a cement is decided principally by

  • A.the distance over which it must be transported
  • B.the strength class and setting behaviour wanted
  • C.the particular colour that the customer has requested
  • D.the size of the storage silo it will be held in

Answer: B

A higher class generally needs a finer grind, and the setting characteristics follow from the same figure. Colour, storage and transport have no bearing on the fineness target. Fineness follows from the performance the cement must deliver.

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