The presence of water is an essential requirement for the development of high energy concrete.Cement by itself doesn't have any binding properties. Nevertheless, the reaction of cement and water produces a compound calcium silicate hydrate( better known because the C-S-H gel) which is the most effective binder.
Water used in concrete must be free from any impurities and should be portable water which is clean and match for drinking. For the reason that presence of acidic and fundamental salts can affect the energy of concrete. Nevertheless, if nothing will be done to make clean water available than sea water will also be used taking into consideration the strength losses incurred by the utilization of the former.
The presence of water imparts a natural circulate to the concrete making it simpler to be used and applied to the surface of the masonry.
The water cement ratio is an essential property for a ready combine design; masons have a bad behavior of increasing the proportion of water content in cement compared to the standards which improve the workability and makes it simpler to transport, deal with, mix, place and consolidate. Nonetheless, extreme water content material decreases the compressive strength of concrete, in accordance with the inverse relation of water cement ratio and energy of concrete given by Abraham.
A significant use of water is in the curing of concrete. Curing is the process of keeping concrete involved with water for a minimum interval of seven days for its final energy develop. Since water has a high particular gravity, it could take the heat escaping out from the surface of concrete and assist in the prevention of thermal cracks fashioned as a result of extreme heat advanced through the process of hydration. The tests executed by high quality control unit entails testing the compressive energy of a 150 mm concrete cube kept in a curing tank for 3,7,14 and 28 days respectively. An identical test procedure for flexural energy entails curing the briquettes in water and dedication of its strength.
Concrete is strong in compression, however weak in rigidity and hence the tensile energy comes out to be negligible. Nonetheless, its test is really useful to calculate the quantity of reinforcement needed beneath impartial axis at zones subjected to high tensile stresses and in the development of prestressed concrete. For a newly created structure, the surface is saved moist for several days by placing burlaps and jute sacks over the columns and staircases and enclosing a area full of water for curing the roof, this allows gradual escape of heat from the structure and Ép cọc bê tông toàn quốc
prevents the development of any cracks. Researchers have experimentally came upon that steam curing is one of the best type of curing for ultimate power development of concrete.