Polyester effectively improves high temperature stability

1. Improve high-temperature stability and high-temperature stability. Due to the three-dimensional distribution of polyester fiber monofilament, it has strong adsorption to asphalt and is not entangled. It can absorb too much free asphalt to make asphalt sticky. The cohesion and cohesion are increased. At the same time, due to the crisscross reinforcement and bridging, the fluidity of the asphalt is reduced, the lateral displacement or flow of the aggregate is restricted, the high temperature stability is effectively improved, and the fiber asphalt concrete is stabilized. The degree has been greatly improved.

2. Improve the low-temperature crack resistance and the absorption of the fiber to the asphalt, which leads to the increase of the optimal asphalt content in the asphalt concrete. The higher asphalt content makes the fiber asphalt mixture still maintain flexibility and higher under the low temperature of -40℃. The tensile strength, effectively resist shrinkage stress, enhance the low-temperature crack resistance of the mixture, reduce the generation of temperature shrinkage cracks and prevent the development of reflection cracks.

3. Improve fatigue resistance. Asphalt pavement is subjected to the repeated action of wheel load under the action of the external temperature environment. When the repeated action of the load exceeds a certain number of times, the stress generated in the pavement under the load will exceed the structural resistance of the reduced strength. Cracks appear on the road surface, resulting in fatigue fracture. After adding polyester fiber, the uniform distribution of fiber monofilament in the mixture will increase its stiffness modulus and improve the fatigue resistance of asphalt concrete.

4. Improve water stability. The water stability of asphalt pavement refers to the repeated effects of traffic load and temperature fluctuation on the asphalt pavement in the presence of water. The addition of polyester fiber thickens the asphalt film, reduces the strength of the water-replacement asphalt, and reduces the amount of water infiltrating into the asphalt concrete. Coupled with the adsorption of the fiber, the viscosity of the asphalt increases, which improves the asphalt and the asphalt. The cohesive force of the aggregate strengthens the ability of the interface film formed by the asphalt and the aggregate in the asphalt mixture to resist moisture stripping, thereby improving the water stability of the asphalt mixture.