In order to better improve the practical engineering problems such as rutting, cracking, pit, and groove in highway engineering, the stability and strength characteristics of calcium sulfate whisker and polyester fiber in asphalt mixture are evaluated based on the road performance test. In this experiment, three different methods of the calcium sulfate whisker content and three different polyester fiber content were used to determine the best asphalt aggregate ratio to prepare different modified asphalt mixture samples. Its high temperature stability, water stability, and low-temperature performance were tested. The results show that the composite modifier of calcium sulfate whisker and polyester fiber can significantly improve the strength stability of asphalt mixture and make its high temperature stability reach 2900.3∼4230.7 Times/mm without reducing its low-temperature bending strength. The optimum content of calcium sulfate whisker is in the range of 2‰∼2.5‰ and polyester fiber is in the range of 2‰∼3‰. The rutting strength and Marshall stability reach the maximum.

中文翻译：

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硫酸钙晶须与聚酯纤维复合改性沥青混合料的路用性能

为了更好地改善公路工程中的实际工程问题，例如车辙，开裂，凹坑和沟槽，基于道路性能测试，评估了硫酸钙晶须和聚酯纤维在沥青混合料中的稳定性和强度特性。在该实验中，使用三种不同的硫酸钙晶须含量和三种不同的聚酯纤维含量方法来确定最佳沥青集料比，以制备不同的改性沥青混合料样品。测试了其高温稳定性，水稳定性和低温性能。结果表明，硫酸钙晶须与聚酯纤维的复合改性剂能显着提高沥青混合料的强度稳定性，使其高温稳定性达到2900.3〜4230。7次/毫米，而不会降低其低温弯曲强度。硫酸钙晶须的最佳含量为2‰〜2.5‰，聚酯纤维的最佳含量为2‰〜3‰。车辙强度和马歇尔稳定性达到最大。