1、 改善高温稳定性，提高高温稳定度由于聚酯纤维单丝的三维立体分布，同时与沥青具有很强的吸附性，且不缠绕，可以吸附过多的自由沥青，使沥青的粘稠度和粘聚力增大，同时由于纵横交错的加筋和桥接作用，降低了沥青的流动性能，限制了集料的侧向位移或流动，有效的改善了高温稳定性，使纤维沥青混凝土的稳定度得到很大提高。

1, improve the high temperature stability, high temperature stability due to the three-dimensional distribution of polyester fibers, and has strong adsorption and asphalt, and no wound, can absorb excessive free asphalt, the asphalt viscosity and cohesion increased, at the same time as the Criss Cross stiffened and bridging effect, reduce the flow performance of asphalt, aggregate limit lateral displacement or flow, effectively improve the high temperature stability, the fiber asphalt concrete stability has been greatly improved.

2、 改善低温抗裂性，纤维对沥青的吸附作用，导致沥青混凝土中最佳沥青用量增加，较高的沥青含量，使纤维沥青混合料在-40℃的低温下仍然保持柔韧性和较高的抗拉强度，有效的抵抗收缩应力，使混合料的低温抗裂性能增强，减少温缩裂缝的产生以及可以防止反射裂缝的发展。

2, improve the crack resistance at low temperature, the adsorption of fiber asphalt, resulting in the increase of optimum asphalt concrete dosage, higher asphalt content, the fiber asphalt mixture still maintain high tensile strength and flexibility in the low temperature of -40 DEG C, effectively resist shrinkage stress, the low temperature anti cracking performance of mixture enhancement. Reduce the temperature shrinkage cracks and can prevent the development of reflective crack.

3、改善抗疲劳性能沥青路面在外界气温环境作用下，经受车轮荷载的反复作用，当荷载重复作用超过一定的次数后，在荷载作用下路面内产生的应力就会超过强度下降的结构抗力，使路面出现裂纹，导致产生疲劳断裂破坏，掺加聚酯纤维后，纤维单丝在混合料中的均匀分布的加筋作用，使其劲度模量增加，改善沥青混凝土的抗疲劳性能。

3, improve the anti fatigue performance of asphalt pavement in the outside temperature conditions, to undergo repeated wheel load, when the loads exceed a certain number of times, resulting in pavement under load the stress will exceed the structural resistance strength decreased, the pavement cracks, resulting in fatigue fracture, adding polyester fiber, reinforcement fiber evenly distributed in mixture, increasing the stiffness modulus, anti fatigue performance improvement of asphalt concrete.