Compressive strength and density of concrete

Compressive strength and density of concrete

In order to investigate the physical properties of hardened concrete in a structural element, cores can be taken for subsequent laboratory testing and/or examination or cubes made from freshley poured concrete.

Cores of various diameter and lengths can be tested. However it should be noted that testing standards state that a core diameter of less than three times the nominal aggregate size may provide adversely low results.  A minimum prepared length/diameter ratio of 1.0 is also recommended.

Concrete cubes are manufacutured from fresh concrete usually  in moulds of 100, or 150mm.  Samples are stripped and soacked generally for a 28 day period prior to compressive strength and density testing.

The density and compressive strength of a concrete core is determined in accordance with BS EN 12504. Concrete cubes are tested in accordance with BS EN 12390, Nicholls Colton is  *UKAS accredited for these tests..