Concrete is a composite material made by mixing different materials like cement, sand, aggregate, and water with or without admixture. The strength and quality are dependent on the mixing proportions.
Simply put, concrete grade is the absolute minimum strength the concrete must harbour 28 days after its construction. You will need to understand the acronyms behind the grading formula to understand your mix ratios. We’ve simplified this for your convenience below:
M - stands for mix
MPA - MPA stands for megapascal, which measures the compressive strength of the concrete. Concrete contractors will measure MPA to understand how much pressure can be applied to the concrete without it cracking or failing. Simplified, MPa tells us the overall strength of the concrete.
PSI - All concretes come with different strengths, compositions, applications and types. We measure a concrete’s compression in pounds per square inch (PSI). Most concrete compositions have a PSI range of between 2,500 and 5,000.
Concrete mixes are designed as per Indian Standards, BS, ACI & MORTH based on the material properties, site conditions and requirements.
M10(1450 PSI) : Mix ratio is 1:3:6 (1 Cement, 3 Sand and 6 Aggregate). This is a low-strength concrete mix used for non-structural applications. Ideal for:Pavements and driveways to support pedestrians and light vehicles, floor blinding and void filling.
M15(2175 PSI) : Mix ratio is 1:2:4 (1 Cement, 2 Sand and 4 Aggregate). This concrete is suitable for medium strength applications and general constructions purposes. Ideal for:beams, lintels, internal floor slabs and blinding, and lightweight kerbing jobs.
M20(2900 PSI) : This concrete is widely used in construction of resident and low-rise buildings and for structural elements such as foundations and flooring. Ideal for:paving for patios, beams, columns, fence posts and kerbing
M30(4350 PSI) : This concrete is often used in road construction and other projects requiring resistance to heavy traffic and adverse weather conditions. Ideal for: Slabs, beams, house foundations, bridges and industrial structures.
Selecting the best concrete grade for your designed project depends on several factors. Consider the expected loads and stresses the structure will endure and the local climate conditions. If you need any customised concrete mixes or need help selecting the right mix, please contact us today to get more help from one of our concrete experts.