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根据多孔沥青路面体积模量的衰变过程,计算了龚帕斯预测模型的3个参数,提出了体积模量随时间衰变的预测模型,并分析了空隙率随时间的变化规律。分析结果表明:对于使用期为12年的多孔沥青路面,描述体积模量衰变的理论曲线与体积模量衰变的预测曲线基本一致,理论值与预测值的最小误差率为0.126%,最大误差率为1.997%;空隙率随时间呈对数减小,并在空隙率小于16%后减小的趋势趋于平缓。可见,模型的预测结果符合体积模量的衰变规律,可应用于多孔沥青路面的体积模量衰变特性分析。
According to the decay process of the bulk modulus of porous asphalt pavement, three parameters of the gypsum prediction model are calculated, the prediction model of the decay of bulk modulus with time is proposed, and the variation law of porosity with time is analyzed. The results show that for the 12-year porous asphalt pavement, the theoretical curve describing the bulk modulus decay is basically the same as the predicted curve of the bulk modulus decay. The minimum error rate between the theoretical and predicted values is 0.126%. The maximum error rate Was 1.997%. The voidage decreased logarithmically with time, and the trend of decrease after the porosity was less than 16% tended to be gentle. It can be seen that the predictions of the model are in accordance with the law of decay of bulk modulus and can be applied to the analysis of bulk modulus decay of porous asphalt pavement.