Today I will discuss about importance of water in concrete at different stages of it . I’ve seen that most of the workers, contractors if not all and some of the Engineers tends to ignore the importance of Water at various stages of concrete. The main reason behind this I think is that they are not aware of the fact that water plays a dramatically important role in concreting operations, as it is a kind of maker or breaker. Also students tends to take the matter lightly, but they must understand that actually it is a single most important factor which can change the quality of concrete even no matter how much extra cement you put into for the compensating purpose.
Let us first understand when and how water comes in contact with the concrete. The concrete itself is a conglomeration of Water, Binder, Fine Aggregate and Coarse Aggregate. Binder in case of Cement Concrete which one is in use in modern day construction is Cement, which may be of any type like OPC, PPC, PSC etc. as Fine Aggregate generally Sand is used, and as Coarse Aggregate Crushed Stone or Stone Chips is used. Now Water in concrete comes in two different stages,
- During the mixing of the raw ingredients of concrete, that means while producing the Green Concrete.
- Secondly, after the concrete has hardened.
Before going into main course let us first understand few key notes:-