What is Concrete mix ratio and how its calculation ?

 

Concrete mix ratio

Concrete mix ratios are the proportions of concrete components such as cement, sand, aggregates  and  water. These  mix ratios  are  decided  based on type of  construction and mix designs. However, building codes provides nominal and standard concrete mix ratios for various construction works based on experience and testing.

 

Concrete mixes are defined in ascending numbers of 5, starting at 10, and show the compressive strength of the concrete after 28 days.

Different mixes (M) come in various mix proportions of the various ingredients of cement, sand and coarse aggregates. For instance, M20 comes in the respective ratio of 1:1:5:3. You can see other examples below in the table

 

­Calculation of Volume of Sand (Fine Aggregate)in m3 of Concrete:

 Hear ,

         Assume,we calculation mix ratio M20