Adding water reducing agent into concrete can effectively improve the workability and fluidity of concrete, improve the concrete structure and increase the strength, while maintaining the same concrete strength can also save a lot of cement.
Therefore, water reducing agent has become an indispensable admixture in the preparation of commercial concrete.
See reducing water agent can improve the strength, and a large number of cement to save the important role, the construction personnel mistakenly prepared commercial concrete using reducing water agent, the higher the better, even in the preparation of low grade concrete also requires a higher reduction rate.
Generally, with the increase of water reduction rate, the concrete strength will be higher and higher.For the concrete with high water glue, the water consumption is reduced, the dry shrinkage of concrete will also be reduced, to improve the strength of concrete, reduce the concrete shrinkage cracking of course very beneficial.
But at present the concrete construction design water glue ratio is relatively low, because of the shrinkage has not allowed to ignore, if the water consumption is greatly reduced, will increase the drying shrinkage of the concrete, so as to increase the shrinkage of the concrete.
In addition, the commercial concrete preparation is generally mixed with a retarder, due to slow hydration, concrete for a long time does not set, the concrete surface water loss is serious, the greater the risk of concrete shrinkage cracking.
