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研究了钢纤维、德兰尼特纤维和木质素纤维沥青混合料的马歇尔指标性能、抗拉强度、动稳定度、抗剪强度和疲劳寿命。结果表明,在沥青混合料中加入纤维可以显著提高沥青混合料的抗拉强度而使其刚度降低,从而具有良好的抗裂性能,钢纤维和德兰尼特沥青混合料具有较好的热稳定性及抗剪强度,钢纤维沥青混合料具有较高的疲劳寿命。因此,可以通过在沥青混合料中加入纤维来提高沥青混凝土路面性能和使用寿命,避免沥青混凝土路面在重载交通作用下的提前破坏和低温条件下沥青混凝土路面的收缩开裂,延长路面使用寿命。
The Marshall index performance, tensile strength, dynamic stability, shear strength and fatigue life of steel fiber, Delaunay fiber and lignin fiber asphalt mixture were studied. The results show that the addition of fibers to the asphalt mixture can significantly increase the tensile strength of the asphalt mixture and reduce the stiffness of the asphalt mixture, so that it has good crack resistance. The steel fiber and Drambit asphalt mixture have good thermal stability Sex and shear strength, steel fiber asphalt mixture has a high fatigue life. Therefore, by adding fibers to the asphalt mixture to improve the performance and service life of asphalt concrete pavement, avoiding the early damage of asphalt concrete pavement under heavy traffic and shrinking and cracking of asphalt concrete pavement under low temperature, prolong the service life of pavement.