Grades of Concrete

Grades of concrete with ratio refer to the characteristics strength of concrete which is achieved by mixing adequate proportions of ingredients of concrete to achieve the desired strength after 28 days of curing period. The word characteristics of concrete are defined as the 95 percent of test results of concrete are expected to pass the strength specified after 28 days of curing period.

As per IS456.2000, the grade of concrete is designated by using the letter “M” before the strength of concrete like M10, M15, M20, etc. Here “M” refers to the Mix of concrete and the number specifies cubical strength in Mega Pascals (Mpa) or N/mm2 after passing of 28 days of curing period.

Grades of Concrete with proportion

The proportion of concrete is basically the number of ingredients required to make the grade of concrete. In other words, it can be said that how much cement, fine aggregate, coarse aggregate & water-cement ratio is required to make a particular concrete mix. This proportion is expressed in the ratio. For example, a:b:c, where ‘a’ is cement quantity in bags, ‘b’ is for fine aggregate in cft and ‘c’ is for coarse aggregate in cft.

These quantities can be measured which we will discuss later.

Some of the standard proportions for different grades of concrete are

If you want to learn more about grades of concrete with ratio please visit our complete article on Grades of Concrete

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