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

Discussion

Gypsum is added to cement clinker in order to

  • A.retard the setting caused by tricalcium aluminate
  • B.increase the early strength of the finished cement
  • C.improve the appearance and colour of the product
  • D.reduce the overall cost of the raw materials used

Answer: A

Without it the aluminate would react almost instantly and the cement would flash set. The quantity is controlled carefully, since too much causes expansion in the hardened paste. The standards therefore set an upper limit on total sulphate content.

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

Post your comment

Please log in or register to post a comment.