Concrete mix design involves a process of preparation in which a mix of ingredients creates the required strength and durability for the concrete structure. … The ingredients to be tested: water, fine aggregate (sand), coarse aggregate, cement, chemicals, reinforcement, and soil
As per IS456:2000, Different grades of concrete are classified into M5, M7.5, M10, M15 etc., whereas M stands for Mix and the number behind M stands for Characteristic Compressive strength of the concrete in N/mm2 at 28 days