Polypropylene engineering fiber is mainly used as an engineering material to improve the durability of concrete and is widely used in the construction of civil engineering.

If the anti-fatigue performance is regarded as an indicator of the durability of the pavement deck concrete, the above understanding is of course correct. In addition, the improvement of the performance of polypropylene engineering fibers also includes the following: By reducing the bleeding of concrete, the surface concrete quality can be improved, so that the wear resistance of concrete can be improved, and the crack resistance effect can be significantly improved. Concrete anti-leakage performance. Polypropylene engineering fibers also have no adverse effect on other durability indexes of concrete, such as permeation resistance, frost resistance, salt freeze resistance, chemical resistance, etc., but the degree of improvement needs further study.

1 Polypropylene engineering fibers can eliminate or reduce the number and dimensions of primary fissures in concrete. This effect not only can effectively prevent plastic cracking of concrete, but also is very beneficial to the performance of hardened concrete.

2 Polypropylene engineering fibers can not significantly improve the quasi-static strength of hardened concrete. However, by improving the impact resistance and fatigue resistance of concrete, the use performance of concrete for pavement bridge decks can be improved.

3Because of the differences in fiber fineness, elastic modulus and other properties, the effect and mechanism of polypropylene engineering fiber and steel fiber on the performance of concrete are different. Both have their own strengths.

4 Due to the test evaluation method, the indoor small test pieces could not fully demonstrate the use effect of polypropylene engineering fibers in actual projects, resulting in an underestimation of the actual use effect of polypropylene engineering fibers.

Therefore, polypropylene engineering fibers play an important role in the durability of concrete, and can improve the overall performance of concrete.