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采用汉堡车辙试验系统进行车辙试验,分析荷载作用次数、试件厚度、温度、混合料力学性能对沥青混合料车辙进程的影响,建立了以上影响因子与车辙深度的关系,并建立了沥青混合料车辙预估模型;通过AC-13、AC-16和AC-20这3种混合料、40℃、50℃、60℃3种温度下的大量室内车辙试验数据确定了模型参数。结果表明,车辙深度与荷载作用次数呈乘幂关系增加,与温度呈指数关系增长,与混合料重复加载试验力学性能参数εp/Fn呈乘幂关系,而与试件厚度关系不显著,根据建立的车辙预估模型得到的车辙预估值与实测值误差基本不超过±10%,进而通过9条路段的车辙实际调研数据对模型参数进行了修正,得到了实际路面车辙预估模型,可以为路面混合料设计提供参考。
The rutting test was carried out by using the Hamburg rutting test system. The influence of load times, specimen thickness, temperature and the mechanical properties of the mixture on the rutting process of the asphalt mixture was analyzed. The relationship between the above influencing factors and the rutting depth was established and the asphalt mixture Rut prediction model. The model parameters were determined by a large number of indoor rutting test data at three temperatures of 40 ° C, 50 ° C and 60 ° C with AC-13, AC-16 and AC-20. The results show that the depth of rutting increases with power in exponential relationship with exponential growth, which is exponentially related to the mechanical property parameter εp / Fn of the mixture under repeated loading, but has no significant relationship with the specimen thickness. According to the established The rutting prediction model obtained the rutting prediction value and the measured value error basically no more than ± 10%, and then through the 9 sections of the rut actual survey data to correct the model parameters, the actual road rut forecast model can be Pavement mixture design for reference.