What is Cube test of Concrete?

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Five different mould sizes were used to cast 420 concrete cubes using 1:2:4 mix and watercement ratio In each size equal number of cubes was cured for 3,

Concrete cubes of size 15cm x 15cm x 15cm are typically used for the test The cubes are cured for 7 days or 28 days then tested in a compression testing formula for cube testing: ex: m20 size of cube surface area is 15*15 =22510= for m20 7 days 20 * * 67% = kn 28 days 20 * = 450 kn

what is dtcp approval cement or concrete cubes, cylinders and beams for tests of cement and 1 Cube Mould size concrete cubes tested at 28 days Why do we test at 7, 14 & 28 days? Concrete is a macro content with Sand, Cement, & Coarse aggregate as its micro