Calculation Of Water Cement Ratio In Concrete Mix Design

Just assume that the required volume of cement for the mix is 100 kg and w c is 0 4.

Calculation of water cement ratio in concrete mix design.

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. In the present example water cement ratio is raised to 0 55 from 0 5. For ordinary concrete work sidewalks and driveways. 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.

For the calculation of water quantity for concrete first of all we have to find the quantity of cement. Water quantity 0 4 x 100 kg 40 liters 100 kg cement or 20 liters 50 kg cement bag. A lower water cement ratio can contribute to a high strength and high quality concrete. Limitation chart for w c ratio shows the maximum value of the w c ratio as per is 456.

0 5 w c ratio indicates that for every 100 kg of cement 50 lit. It s a calculation. In case of trial mix 3 water cement ratio is varied by 10 keeping water content constant. 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.

If required higher quality concrete is desired. Water cement ratio is defined as the ratio of the weight of water to the weight of cement. An increase of 0 05 in the w c will entail a reduction in the coarse aggregate fraction by 0 01. 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.

Of water is added. A good mix proportion and quality aggregates and binding materials contribute to good mix design. The practical best water cement ratio is from about 0 40 to over 0 60. 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.

Of water lbs. Of water lbs. A ratio of 0 3 is made concrete too stiff unless superplasticizers are used. For design mix the w c ratio will depend upon the workability strength requirements.

In is 10262 2009 annex a. A low water cement ratio is hence one of the factors influencing 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. Of cement w c m lbs.

Water cement ratio as per is 10262 2009 for the concrete mix varies from 0 4 to 0 6. But water cement ratio alone cannot give a good concrete. They have explained the process for design mix. 0 7 w c ratio is also used for pumped concrete.