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State whether the following is true or false.
Minor elements present in small quantities can influence clinker phase formation appreciably.

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

Answer: B

Magnesium, alkalis, sulphur and fluorine all affect which polymorphs form and how readily the phases crystallise. This is why raw materials are analysed for far more than the four principal oxides. Trace constituents can shift phase formation more than their quantity suggests.

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