Since Nominal Mix ratios are in volume and easy to follow, they are used in the construction sites to prepare different grades of concrete in concrete mixers. Nominal Mix ratios are prescribed concrete Mix ratios to get different grades of concrete, whereas Design Mix ratios are calculated through the Design mix procedures from IS10262 codebook. Difference between Nominal Mix Ratio and Design Mix Ratio For example, the prescribed Nominal concrete mix ratio of M20 concrete is 1:1.5:3, hence for every 1 part of cement, 1.5 parts of sand and 3 parts of aggregate, in volume, is needed to prepare M20 grade concrete. What is Concrete Mix Ratio?Ĭoncrete mix ratio is a relative proportioning of cement, sand, aggregate and other materials needed to prepare different grades of concrete. For example, M20 grade concrete will achieve its compressive strength of 20 N/mm 2 in 28 days after curing in water.
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