The work-ability and strength of the concrete depends on the water ratio of the concrete . So in this blog i am going to tell you what is the best procedure to calculate Water ratio for concrete .

First you should know , What is Water ration of concrete :-

Water Cement Ratio means the ratio between the weight of water to the weight of cement used in concrete mix.Normally water cement ratio falls under 0.4 to 0.6 as per IS Code 10262 for nominal mix .

Lets take Example :-

Cement required for 1 m³ of M 20 grade concrete is 7 bags.

1 bag of cement contains 50 kg of cement.

7*50 = 350 Kg of cement.

Let’s assume that the water cement ratio is 0.55.

Water content= Cement content x W/c ratio

Water content = 300 Kg x 0.55 = 165 Kg.

We know, 1 Kg =1 litre

So water content= 165 Kg. = 165 Litres

Add 5% wastage of water during mixing, handling,

∴ Water content = 5×165/100 + 165 = 174 litres.

Note :-

  1. Adding more water than this allowable Water cement limit will actually affect the strength.

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