Building Materials
Name the type of cement from the following for canal linings:

Rapid hardening cement
Quick setting cement
Sulphate resisting cement
Pozzolana cement

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Building Materials
When a brick is immersed in water for 24 hours and then dried, if

10 percent surface is covered with grey or white deposits, the brick has slight efflorescence
50 percent surface is covered with grey or white deposits, the brick has serious efflorescence
No grey or white deposits appear on the surface, the brick is free from soluble salts
All listed here

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