The proportion of lime, silica, alumina and iron oxide in a good Portland cement shold be -

- 1
  
  63:22:6:3
- 2
  
  63:22:3:6
- 3
  
  22:63:6:3
- 4
  
  22:63:3:6

Display Comments

Leave a comment

Login at first then you can submit comment. Click here to login.