Test on Concrete-Compressive Strength Test

 1.Crushing/Compressive Strength Test: 

Metallic moulds of size 150 mm × 150 mm × 150 mm are used for 

casting concrete cubes. Before filling mould, it is properly oiled on its inner surfaces, so that cubes can 

be easily separated. Fresh cube is filled with concrete to be tested in 3 layers and kept in the room. After 

24 hours, cube is removed from the mould and kept under water for curing. After 28 days of curing 

cubes are tested in the compression testing machine. In this test cubes are placed over the smooth 

surface which is in contact with side plates of mould. The crushing load is noted and crushing strength 

is found as load divided by surface area (150 × 150 mm2). 

Code specify the desirable strength of Concrete.