Concrete cube testing is the process by which a batch of concrete is tested for strength and durability. This is done by making a cube of concrete in a machine designed to make concrete blocks, curing the concrete and removing it to perform tests at specific time intervals.
Concrete cubes for testing must be made by someone who is familiar with the process of pouring and tempering concrete. The blocks are moved to a specific testing machine after they have been made and cured for specific periods of time. Pressure is applied to the cubes until they fail. The concrete mixture is marked as a bad batch if the cubes fail before they should or in ways they shouldn't.