What Is A Concrete Cube Test? And Why Is This Important?

In the construction industry, it is vital to ensure the strength and the quality of any building work; that's why it is necessary to make sure you are using high-quality concrete in the construction. Like the other strength test, the cube test for concrete determines the compressive strength of freshly mixed concrete.

This is first put into a curing plant to cure and then crushed or compressed between two parallel plates of the testing machines. Some concrete providers do this test in a specific lab, but now there are varieties of cube testing machines available in stores and online. These testing machines are manufactured based on different quality standards to provide effective results. For this test, the ideal cube's size is 150mm x 150mm x 150 mm.

How is the cube test done?

• We took freshly mixed concrete for the sample and poured it into the cleaned cube moulds in the first step. You must apply oil to the moulds first. The number of moulds depends on the requirements. Fill the moulds with concreted approximately 50 mm thick and level and smoothen the top surface with the trowel. Leave it for 16-48 hours for the curing. Mostly these cubes are kept for 24 hours.
• Then these cubes are kept in the freshwater at a particular temperature for 7 to 28 days. Then move out the cubes from the water after the particular curing time and wipe out the excess water from the surface.
• Then put into the testing machines. Make sure to align the cubes centrally on the machine's base plate and place it so that the load can be applied to both sides equally. This machine applies the load gradually onto the cube until it breaks. Record the maximum load to compare it with the other cube tests.The cubing test is done in three stages, seven days, 14 days, and 28 days. It is suggested that a minimum of 3 cubes must be tested at all stages.

Why cube test is so important?

Cube test is essential to get the best quality of concrete mixture, as it helps in the determination of the potential and compressive strength of the mixture. It also indicates the variation in quality control. And by having cube test for concrete we can know the rate of gain of strength or concrete and time of removal of form work.

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