Answer / nisikanta

Take all the cubes & submerg it in water.Then when 7,21,28
days will reach then take out the cube 5 minutes before &
let the surface dry.Then place the cube in Compressive
strength test machine in SSD( saturated surface
dry)condition centrally.When the concrete crushed the
machine will automatically stop & take the reading & then
divide the Force(KN)by its surface area.

Answer / sai ashwin

For m20,m25,m30 after the corresponding 7,8,28 days
over,then take the cubes from the water and keep it in the
UTM-universal testing machine and we can get the
compressive strenghts

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