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通过对70号基质沥青、SBS改性沥青RTFOT老化后进行BBR试验来评价沥青的低温性能,并对在同一矿料级配和确定最佳油石比及纤维用量的条件下形成的两种SMA-13沥青混合料进行低温弯曲试验,得到低温性能参数的对比分析,对两种沥青混合料的低温抗裂性能做出评价,以检验该沥青混合料在高等级路面的应用效果,为今后的沥青混合料设计提供参考。
Through the BBR test of 70 asphalt and SBS modified asphalt RTFOT aging to evaluate the low temperature performance of asphalt, and the formation of the same ore grade and to determine the optimal ratio of stone and fiber formed under the conditions of two kinds of SMA- 13 Asphalt Mixture for Low Temperature Bending Test, the comparative analysis of low temperature performance parameters was made, and the low temperature crack resistance of the two kinds of asphalt mixture was evaluated to test the application effect of the asphalt mixture on the high grade pavement, Mixture design for reference.