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State whether the following is true or false.
Sieve residue alone is a sufficient description of cement fineness.

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

Answer: B

It says nothing at all about the material finer than the aperture, which is most of the cement and most of the reactive surface. A Blaine figure or a full distribution is needed to describe the powder properly. Most of the reactive surface lies below any practical sieve aperture.

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