Why is lime added to cement slurry for the topcoat of plastering ?

1.	Why is lime added to cement slurry for the topcoat of plastering ?
A.	To improve the strength of plaster
B.	To stiffen the plaster
C.	To smoothen the plaster for ease of spread
D.	To make the plaster non-shrinkable
Answer» B. To stiffen the plaster

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Why is lime added to cement slurry for the topcoat of plastering ?

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