Calculation Of Water Cement Ratio In Concrete Mix Design

Water quantity 0 4 x 100 kg 40 liters 100 kg cement or 20 liters 50 kg cement bag.

Calculation of water cement ratio in concrete mix design.

For the calculation of water quantity for concrete first of all we have to find the quantity of cement. A lower water cement ratio can contribute to a high strength and high quality concrete. But water cement ratio alone cannot give a good concrete. If required higher quality concrete is desired.

Limitation chart for w c ratio shows the maximum value of the w c ratio as per is 456. 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. The practical best water cement ratio is from about 0 40 to over 0 60. 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.

A ratio of 0 3 is made concrete too stiff unless superplasticizers are used. Just assume that the required volume of cement for the mix is 100 kg and w c is 0 4. A good mix proportion and quality aggregates and binding materials contribute to good mix design. For design mix the w c ratio will depend upon the workability strength requirements.

An increase of 0 05 in the w c will entail a reduction in the coarse aggregate fraction by 0 01. Water cement ratio as per is 10262 2009 for the concrete mix varies from 0 4 to 0 6. 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. In is 10262 2009 annex a.

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. Water cement ratio is defined as the ratio of the weight of water to the weight of cement. Of cement w c m lbs. They have explained the process for design mix.

Of water lbs. Of water lbs. In case of trial mix 3 water cement ratio is varied by 10 keeping water content constant. 2000 which can be adopted during mix design.

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. 0 5 w c ratio indicates that for every 100 kg of cement 50 lit. A low water cement ratio is hence one of the factors influencing good mix design. 0 7 w c ratio is also used for pumped concrete.

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 is added. For ordinary concrete work sidewalks and driveways. Water quantity water cement ratio x volume of cement.