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Concrete mix ratio - Concrete mix design

We all apprehend that on mixture cement with sand, stone/aggregates and water, a paste can type which might be accustomed bind the building materials along. This paste is additionally known as as concrete.
The strength of this concrete mix is determined by the proportion on which these cement, sand, stones or aggregates are mixed.
There are various grades of concrete available in the market based on these ratios. Some of them are: M10, M20, M30, M35,...
-M : Mix represents concrete with designated proportions of cement, sand and aggregate.
- number following “M” represents compressive strength of that concrete mix in N/mm2 after 28 days.
 table showing various grades of concrete mix design along with their respective ratios of cement, sand and aggregates.