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If a clinker contains 1.2 per cent alkali expressed as sodium oxide equivalent, how much is that in a tonne of clinker?

  • A.12 kg
  • B.1.2 kg
  • C.120 kg
  • D.0.12 kg

Answer: A

One and a fifth per cent of 1,000 kilograms is 12. Low-alkali cement is usually specified below 0.6 per cent, so this clinker would be well outside that limit. Low-alkali cement is specified where reactive aggregates are to be used.

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