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State whether the following is true or false.
Cement raw materials must be chemically pure to make a good clinker.

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

Answer: A

What matters is that the oxides are present in the right proportions, not that any one material is pure. Plants routinely blend materials of variable quality and correct the mix, which is why raw mix design is a continuous exercise rather than a one-off calculation.

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