Calculation Of Water Cement Ratio In Concrete Mix Design

A low water cement ratio is hence one of the factors influencing good mix design.

Calculation of water cement ratio in concrete mix design.

Of water is added. For ordinary concrete work sidewalks and driveways. If required higher quality concrete is desired. Water quantity 0 4 x 100 kg 40 liters 100 kg cement or 20 liters 50 kg cement bag.

0 5 w c ratio indicates that for every 100 kg of cement 50 lit. How to calculate water cement ratio the water to cement ratio is calculated by dividing the water in one cubic yard of the mix in pounds by the cement in the mix in pounds. For the calculation of water quantity for concrete first of all we have to find the quantity of cement. Calculate water cement ratio from the maximum free water cement ratio according to environmental exposure condition as per table 5 of 456 2000 this is the limitation given by indian standard.

It s a calculation. But water cement ratio alone cannot give a good concrete. A good mix proportion and quality aggregates and binding materials contribute to good mix design. Required amount of water w c ratio x cement volume therefore required amount of water 0 5 x 50 kg 25 litres 50 kg cement bag.

So if one cubic yard of the mix has 235 pounds of water and 470 pounds of cement the mix is a 1 2 water to cement ratio. So if one cubic yard of the mix has 235 pounds of water and 470 pounds of cement the mix is a 50 water to cement ratio. An increase of 0 05 in the w c will entail a reduction in the coarse aggregate fraction by 0 01. In case of trial mix 3 water cement ratio is varied by 10 keeping water content constant.

In is 10262 2009 annex a. 2000 which can be adopted during mix design. Of water lbs. Of water lbs.

For design mix the w c ratio will depend upon the workability strength requirements. 0 7 w c ratio is also used for pumped concrete. They have explained the process for design mix. Just assume that the required volume of cement for the mix is 100 kg and w c is 0 4.

A ratio of 0 3 is made concrete too stiff unless superplasticizers are used. In the present example water cement ratio is raised to 0 55 from 0 5. The practical best water cement ratio is from about 0 40 to over 0 60. Water cement ratio as per is 10262 2009 for the concrete mix varies from 0 4 to 0 6.

A lower water cement ratio can contribute to a high strength and high quality concrete. The water to cement ratio is calculated by dividing the water in one cubic yard of the mix in pounds by the cement in the mix in pounds. Water cement ratio is defined as the ratio of the weight of water to the weight of cement. Water quantity water cement ratio x volume of cement.