Polypropylene fibers can effectively control microcracks caused by factors such as plastic shrinkage, dry shrinkage, and temperature changes of concrete/mortar, prevent and inhibit the formation and development of primary cracks in concrete, and greatly improve the anti-crack and impermeability performance of concrete/mortar. Grinding performance, increase the toughness of concrete, thereby improving the service life of concrete.

The polypropylene fiber has undergone special anti-static and anti-ultraviolet treatment, so that the fiber is evenly dispersed in the concrete and can exert its effect for a long time; the "Y" section of the polypropylene fiber increases the surface area of the fiber; the fiber is chemically and physically modified, and the surface is rough Porous, which greatly improves the bonding force between fibers and cement-based aggregates.

Polypropylene fibers improve the performance of concrete by reducing the occurrence and number of primary cracks in concrete, and there will be no conflict and chemical reaction with concrete aggregates, admixtures, admixtures, and cement, so it has good adaptability to concrete materials .

In summary, the role of polypropylene fiber in concrete can be classified as the following:

1. Improve crack resistance;

2. Improve impermeability;

3. Improve impact resistance and wear resistance;

4. Improve frost resistance;

5. Improve toughness;

6. Increase the fire resistance of concrete and improve the anti-explosion function;

7. Improve the quality of concrete products.