Building Materials - Engineering
Q1: Pozzolana (or surkhi) is used in limeA
to impart hydraulicity
B
to prevent shrinkage
C
to decrease the cost of construction
D
to decrease the setting time.
ANS:A - to impart hydraulicity Surkhi, Powdered broken brick is used as an adulterant but it imparts strength and hydraulic properties to the mortar. To develop more strength is should be ground very finely with lime in the mortar grinding mill. |
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