In this type of mix, the mix ratios and concrete constituent proportions are prefixed and specified. Nominal Mix is generally adopted for small scale constructions. As Per IS456:2000, the Concrete mix design has the following concrete mix proportions :-Ĭoncrete Mixes are primarily divided into the two different types : Nominal Mix: Remember : 1MPA = N/mm 2 Different grades of concrete :ĭifferent grades of concrete has different Concrete Mix proportions which means different concrete mix ratios. The grade of concrete is also denoted as C16/20, C20/25, C25/30, etc., which means Concrete Strength Class (C) the number behind C refers to Compressive strength of Concrete in N/mm 2 when tested with Cylinder / Cube.
To know the Concrete Mix Design follow below:-Īs per BS 8500-2 British/European standards The grade of concrete is denoted as C10, C15, C20,C25, etc., ‘C’ which means ‘ Concrete Strength class’ and number behind C refers to characteristic Compressive strength of Concrete in N/mm 28 days when tested with the 15cm dia & 30cm height cylinder in direct compression test
The Concrete mix ratio for M20 grade of concrete is 1:1.5:3 that mean 1 part of cement, 1.5 part of sand (fine aggregate) and 3 parts of aggregate (crushed stone) in volume and then batched for mixing. To make ease in understanding we are finding the Concrete mix design of M20 grade concrete. The below mentioned method can be applied to any grade of concrete by changing the values. The procedure for finding the different grades of concrete mixes are same.
Calculation of Volume of Sand (Fine Aggregate) in 1m3 of Concrete:.Calculation of Volume of Cement in 1m3 of Concrete:.Concrete Mix Design for M20 Grade Concrete:.Calculation of Quantities of Cement, Sand and Aggregate in 1m3 of concrete:.
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