Answer / anil kumar prasad

To prevent the developement of crack due to expansion &
contraction of steel & cement with temperature.

Answer / sunil

To avoid the air crack

Answer / rishabh thakur

absolutly right, i am agree with Mr. sunil, bcz the material used(cement ,fine etc.) expand with temp.so it should be provided b/w to complex

why we take cube depth 150mm for testing

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