The quantity of water required for a given concrete mix is the total consumption of water for the cement plus the consumption of aggregates. Water for a given concrete mix is measured either in liters or gallons.

**Water required for 1 bag of cement = 11.667 liters****Water required for aggregatesÂ Â Â Â Â =Â 5% weight of the aggregates.**Note:1 bag of cement = 0.0354cu.m or 1.25cu.ft

### Quantity of Water for Concrete Mix 1:2:4Â

Firstly, the amount of cement, fine and coarse aggregates are determined.

- Quantity of Cement = 0.0354cu.m
- Quantity of Fine Aggregate = 2 x 0.0345cu.m = 0.069 cu.m
- Quantity of Coarse aggregate = 4 x .0345 cu.m = 0.138 cu.m

Hence,

Total weight of aggregates = 0.069+.138 = 0.207cu.m

- Water for 1 bag of cement = Water for 0.0345cu.m of cement = 11.667 litres
- Water for aggregates of 0.207cu.m = 5% of weight of aggregatesÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â =(5/100) x 0.207 = 0.01035cu.m = 10.35litres

Note: 1cu.m = 1000litresTotal water required for 1:2:4 concrete mix is

**11.667 + 10.35 =Â**Â

**22 litres**

Tags: Foundation, Construction
Concrete Mix Design