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