纤维加筋材料在寒冷地区道路的适用性研究

Applicability study of fiber reinforced material in frigid region road

采用两种聚酯纤维来改善AC - 16I沥青混合料性能 ,通过马歇尔试验、高低温性能试验、水稳定性试验以及疲劳试验作对比分析 ,并对纤维加筋沥青混合料的作用机理和贡献作研究 .以期改善沥青路面性能 ,尤其是低温抗裂性 ,为寒冷地区的沥青路面温度裂缝问题提供解决途径 .试验结果表明采用聚酯纤维加筋沥青混合料 ,可以提高混合料的高温稳定性和低温抗裂性 .纤维长度不同加筋效果也会有较大差别 ,对于AC - 16而言 。

Two polyester fibers were used to modify asphalt mixture of AC-16I, on the basis of Marshall test, high and low temperature performance test and water stability and fatigue test. The results were contrasted and the strengthening mechanism and contribution of fibers were studied. The asphalt pavement performances, especially low temperature performances were modified in order to offer solutions for temperature cracking of asphalt pavement in frigid region. The results of test indicated that using polyester fiber could improve high temperature stability and low temperature cracking resistance performance. The length of fiber would affect the reinforcement effect. For asphalt mixture of AC-16I, the 12 mm fiber had better performances.