Saved Bookmarks
| 1. |
Portland cement contains 'X' to enhance the setting time. What is 'X'?(A) CaSO4. 1/2 H2O(B) CaSO4.2H2O(C) CaSO4(D) CaCO3 |
|
Answer» Correct option is (B) CaSO4.2H2O Gypsum (CaSO4.2H2O) is used to enhance setting time in portland cement. |
|