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The alumina modulus of a raw mix relates alumina to

  • A.calcium oxide
  • B.silica alone
  • C.magnesium oxide
  • D.iron oxide

Answer: D

It governs the balance between the aluminate and ferrite phases in the clinker and affects how the melt behaves in the burning zone. Together with the lime saturation factor and silica modulus it fixes the character of the mix.

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