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对PR和RA两种添加剂不同掺量的AC-20C和SUP-20两种级配的沥青混合料进行车辙试验。采用动稳定度、相对变形参数和综合稳定指数对混合料的抗车辙性能进行评价,且应用灰色关联分析及统计学检验方法对车辙试验结果进行分析。结果表明马歇尔特征值中的马歇尔稳定度和马歇尔模数是影响车辙试验结果的主要因素;在PR或RA相同的试验条件下,级配由AC-20C转变为SUP-20时,对车辙试验结果影响较小。改性剂PR或RA对改善沥青混合料的抗车辙性能显著有效,且PR对混合料的改性性能优于RA。
Rutting test was carried out on two kinds of graded asphalt mixture of AC-20C and SUP-20 with different dosages of PR and RA. The anti-rutting performance of the mixture was evaluated by dynamic stability, relative deformation parameters and comprehensive stability index. The results of rutting test were analyzed by gray relational analysis and statistical test. The results show that Marshall stability and Marshallian modulus are the main factors affecting the results of the rutting test. When the gradation is changed from AC-20C to SUP-20 under the same test conditions of PR or RA, the rutting test results Less affected. Modifier PR or RA is effective in improving the rutting resistance of asphalt mixture, and the modification performance of PR on the mixture is better than that of RA.