Polyester fiber characteristics and applications

Polyester fiber is a new anti-cracking reinforced material specially developed and produced for reinforced asphalt concrete. It is a bundled synthetic fiber made of 100% polyester synthetic material and processed by a unique process. It has the advantages of strong chemical stability and strong gripping power with asphalt. When added to asphalt concrete, it can form a three-dimensional distribution of a huge number of fiber monofilaments after stirring, which plays the role of reinforcement and bridging, so as to effectively improve the asphalt mixture. Mechanical properties to prevent cracking of asphalt concrete.

The main function

◆ Improve the low temperature cracking resistance of asphalt concrete Under the temperature drop and low temperature environment, the general asphalt pavement will shrink or crack due to stress relaxation. If polyester fiber is added to asphalt concrete, the mixture will have a large number of uniformly distributed criss-cross fiber monofilaments, which will improve the elasticity of the asphalt mixture, make it have good deformation resistance, and remain flexible at low temperatures. It can effectively resist shrinkage stress and reduce temperature-shrinkage cracks, thereby improving the low-temperature cracking resistance of asphalt concrete.

◆ Improve the fatigue resistance of asphalt concrete. Evenly distribute and reinforce the mixture in the mixture, so that the stiffness modulus is increased by 11.3-1.4 times, and the fatigue properties are improved. Polyester fibers can significantly improve the water stability, spalling resistance, abrasion resistance and durability of asphalt concrete, and can effectively resist reflective cracks, thereby greatly improving the quality of the pavement and prolonging the service life of the pavement. Polyester fibers can effectively improve tensile, compressive, shear and impact strength. Relevant experiments show that the tensile and compressive strengths are increased by 15-18%.