Superplasticizer is the most commonly used additive in the production of concrete. The advantages of its use are undeniable: the concrete mixture becomes more plastic, its fluidity increases without the addition of an excess amount of water, and cement is saved. As you know, the duct plays an important role in the ventilation system. By clicking on the following link you can buy an air duct in Moscow at a low price.
In the production of concrete mixes, there is a well-known technological contradiction: for the durability of a concrete product, less water should be added for its mixing, ideally only so that the process of cement hydration goes through and no more. But such a «hard» mixture is impossible to put in a good quality. Therefore, in order for the mixture to become more mobile, more water is added than necessary. This significantly reduces the design strength. A plasticizer can help in this case. True, there is a drawback in its application. When using it, the speed of hardening of the concrete mixture increases slightly, and it is already considerable. It is necessary to additionally use a hardening accelerator. And then the advantages of the plasticized concrete mix become undeniable..
So, cement for 1 cubic meter of concrete can be taken 15% less. The concrete mixture does not reduce its design strength, since much less mixing water is used, and the mobility continues to remain high. In addition, there is no need to vibrate the laid mixture..