1. 提高高温稳定性，提高高温稳定性. 由于涤纶单丝的三维分布, 对沥青有很强的吸附作用, 并且没有纠缠. 它可以吸收过多的游离沥青, 增加沥青的粘度和内聚力. 同时, 由于交叉和交叉的加固和架桥作用, 降低沥青的流动性能，限制骨料的横向位移或流动, effectively improve the stability of high temperature, so that the stability of fiber asphalt concrete has been greatly improved.
2. Improve the low-temperature crack resistance and the absorption effect of fiber on asphalt, resulting in the increase of the optimal asphalt content in asphalt concrete and the higher asphalt content, so that the fiber asphalt mixture still maintains flexibility and higher tensile strength at – 40 ℃ low temperature, effectively resist the shrinkage stress, enhance the low-temperature crack resistance of the mixture, reduce the generation of temperature shrinkage cracks and prevent them Development of reflection cracks.
3. Improve the anti fatigue performance of asphalt pavement under the action of external air temperature environment, under the repeated action of wheel load, when the repeated action of load exceeds a certain number of times, the stress generated in the pavement under the action of load will exceed the structural resistance of strength reduction, causing cracks in the pavement, leading to fatigue fracture damage. After adding polyester fiber, the fiber monofilament in the mixture The uniformly distributed reinforcement increases the stiffness modulus and improves the fatigue resistance of asphalt concrete.
4. Improving the water stability of asphalt pavement means that the asphalt pavement undergoes the repeated action of traffic load and temperature rise and contraction under the condition of water. The addition of polyester fibers increases the thickness of the asphalt film, reduces the strength of water replacing asphalt, and reduces the amount of water permeated into the asphalt concrete. 此外, the adsorption of the fiber increases the viscosity of the asphalt, improves the cohesive force of the asphalt and aggregate, and strengthens the ability of the interface film to resist the water stripping effect in the asphalt mixture, thereby improving the asphalt. Water stability of the mixture.
