Different Grade of Concrete: M20, M25, M30, their Mix ratio

What Is Meant by The Grade of Concrete?Different Grades of ConcreteUses of Different Grades of Concrete1. Ordinary Grade:M5, M10, and M15 grades of concrete are mostly used in Plain Cement Concrete (PCC) works as bed concrete below column footing. While M20 grade concrete is used for RCC works (for mild exposure) such as the construction of slabs, beams, columns, footings, etc.2. Standard Grade:M25, M30, M35, M40, and M45, fall in the category of the standard grade of concrete. Concrete grades ranging from M25 to M35 are mostly used to construct RCC works such as footings, columns, slabs, beams, etc. Whereas the higher grades like M40 M45 are used for the constr在civilgyan上