Typically, concrete cube tests involve three main steps:
1. Cubes are collected from site
For the most accurate results, samples must be taken at the moment the concrete is poured, not after. A sample of the concrete that needs to be tested is taken when it is freshly mixed and is poured into 2 or 3 cube moulds. Each mould is filled, leveled, compacted and tampered to BSI requirements, before being transported to our temperature-controlled lab at our South London facilities.
2. Cubes are left to cure for a set amount of days
In our technical laboratory, the cubes are kept in their moulds for 24 hours, before being cracked open and put into water tanks to cure for 1-4 weeks. Each cube will be left for different lengths of time to check its strength at different stages.
3. Concrete cubes are crushed and tested
Once cured and ready to test, each cube is placed into our concrete crusher, which steadily exerts force on the cube until it breaks. The rate at which the cube crushes is measured, and this gives us its compressive strength.
Read our article to learn more about how cube testing works.