Why polyacrylonitrile fiber can improve concrete crack

Why say polyacrylonitrile fibers can effectively improve the crack resistance of concrete it? Because some of the features of its own, then the main specific reasons as follows:

1, polyacrylonitrile fiber and cement adhesion is very good, so you can play a supporting role, and can also reduce bleeding and thus prevents cracks;

2, by adjusting the water content, so that we can avoid excessive evaporation of water, so that it can avoid shrinkage cracks due to the lack of moisture caused;

3, but also control what the temperature outside the case, since the temperature difference between the relationship at any time within the concrete due to be cooled with water or in a timely manner, in order to reduce cracks.

In addition to the above three points, in fact, we have to rely on polyacrylonitrile fibers themselves some of the features, of course, we want to make good use of this advantage.