Machine-translated by Google. Questions are authored in English.
Top

Discussion

If clinker is 95 per cent of a cement and gypsum 5 per cent, how much gypsum is in 2 tonnes of cement?

  • A.50 kg
  • B.200 kg
  • C.95 kg
  • D.100 kg

Answer: D

Correct answer: 100 kg

\[ 2000\ \mathrm{kg} \times 0.05 = 100\ \mathrm{kg}. \] The 50 kg offered treats the two tonnes as one. Gypsum is added at this few per cent to control setting: without it the tricalcium aluminate would hydrate almost instantly and flash set the cement before it could be placed.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.