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Discussion

The residue and Blaine figures for a cement give different information because

  • A.residue describes the coarse end and Blaine the whole distribution
  • B.the two are simply two different units expressing the same quantity
  • C.residue is measured on the clinker and Blaine on the cement
  • D.the Blaine figure applies only to blended cements and no others

Answer: A

A sieve tells you only what is larger than its aperture, whereas the permeability test responds to the total surface including the fines. Reporting both gives a fuller picture than either alone does. Specifications increasingly call for both figures to be reported.

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