The main objective of this research is to investigate the permanent deformation of asphalt mixtures containing direct coal liquefaction residue (DCLR) under various tire pressures and temperatures. Three types of asphalt mixtures, including control/DCLR/composite-DCLR modified asphalt mixture, were prepared by the Marshall design method. The rutting test was conducted under a tire pressure range of 0.7–1.0 MPa with a 0.1-MPa interval and at a temperature range of 55–70°C with a 5°C interval. Moreover, the dynamic stability and rutting depth of three asphalt mixtures were obtained to evaluate their resistance of permanent deformation. It was found that the rutting resistance of three asphalt mixtures declines with the increased tire pressures and temperatures. The asphalt mixture containing DCLR has a higher dynamic stability and lower rutting depth compared to the control asphalt mixture under the same conditions. Furthermore, the rutting resistance of composite-DCLR modified asphalt mixture is better than that of DCLR modified asphalt mixture. It indicates that the composite-DCLR is favorable for the improvement of rutting resistance of asphalt mixture. Moreover, the analysis of variance was applied, which analysis results showed that the rutting resistance of asphalt mixture is more sensitive to temperature than tire pressure. Based on the least-squares procedure, the relationship between dynamic stability and rutting depth was obtained, and the accuracy of the prediction is acceptable.

这项研究的主要目的是研究在各种轮胎压力和温度下含有直接煤液化残余物（DCLR）的沥青混合料的永久变形。通过马歇尔设计方法制备了三种类型的沥青混合料，包括对照/ DCLR /复合-DCLR改性沥青混合料。车辙试验是在0.7-1.0 MPa的轮胎压力范围内以0.1 MPa的间隔进行的，在55-70°C的温度范围内以5°C的间隔进行的。此外，获得了三种沥青混合料的动态稳定性和车辙深度，以评估其永久变形的抵抗力。发现三种沥青混合物的耐车辙性随轮胎压力和温度的升高而降低。在相同条件下，与对照沥青混合料相比，含DCLR的沥青混合料具有较高的动态稳定性和较低的车辙深度。此外，复合-DCLR改性沥青混合料的抗车辙性优于DCLR改性沥青混合料的抗车辙性。表明复合DCLR有利于提高沥青混合料的抗车辙性。此外，进行了方差分析，分析结果表明沥青混合料的抗车辙性对温度的敏感性比对轮胎压力的敏感性高。基于最小二乘程序，获得了动力稳定性与车辙深度之间的关系，并且预测的准确性是可以接受的。复合DCLR改性沥青混合料的车辙抗性优于DCLR改性沥青混合料。表明复合DCLR有利于提高沥青混合料的抗车辙性。此外，进行了方差分析，分析结果表明沥青混合料的抗车辙性对温度的敏感性比对轮胎压力的敏感性高。基于最小二乘程序，获得了动力稳定性与车辙深度之间的关系，并且预测的准确性是可以接受的。复合DCLR改性沥青混合料的车辙抗性优于DCLR改性沥青混合料。表明复合DCLR有利于提高沥青混合料的抗车辙性。此外，进行了方差分析，分析结果表明沥青混合料的抗车辙性对温度的敏感性比对轮胎压力的敏感性高。基于最小二乘程序，获得了动力稳定性与车辙深度之间的关系，并且预测的准确性是可以接受的。分析结果表明，沥青混合料的耐车辙性比轮胎压力对温度更敏感。基于最小二乘程序，获得了动力稳定性与车辙深度之间的关系，并且预测的准确性是可以接受的。分析结果表明，沥青混合料的耐车辙性比轮胎压力对温度更敏感。基于最小二乘程序，获得了动力稳定性与车辙深度之间的关系，并且预测的准确性是可以接受的。