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Compressive strength of cement is determined on

  • A.the loose powder compressed within a steel mould
  • B.standard mortar cubes of cement, sand and water
  • C.neat cement paste cast into standard cylinders
  • D.concrete beams containing a coarse aggregate

Answer: B

Using a standard sand and a fixed proportion removes the variability that aggregate would introduce, so the test measures the cement rather than the concrete. It is a comparative test rather than a prediction of structural strength.

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