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State whether the following is true or false.
Slow cooling of clinker can be detected under the microscope after the event.

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

Answer: A

Decomposed alite, fringed belite and large aluminate crystals all record it in the microstructure. This makes microscopy a useful diagnostic when strength results come in lower than expected. The clinker itself carries the evidence long after the event.

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