Which compound causes the cement efflorescent, if present in excess?
A. Iron oxide
B. Alkali oxide
C. Sulphur trioxide
D. Lime
Answer:B
Which compound causes the cement efflorescent, if present in excess?
A. Iron oxide B. Alkali oxide C. Sulphur trioxide D. Lime
Explanation: Alkali oxides causes cement efflorescent if present in excess. The alkali