拌和次序对热再生沥青混合料高温性能的影响

发布时间：2018-06-26 08:03

本文选题：热再生沥青混合料 + 拌和次序　；参考：《江苏大学学报(自然科学版)》2017年03期

【摘要】：采用3种不同的拌和次序(A,B,C)及2个标号(70~#,90~#)的沥青结合料成型热再生沥青混合料,利用旋转压实成型仪SGC分析热再生沥青混合料在成型过程中压实参数(CDI,CEI)的变化情况;采用汉堡车辙仪HWTD分析该混合料在轮碾过程中的蠕变斜率,据此评价拌和次序对热再生沥青混合料高温性能的影响.试验结果表明:B类拌和次序的CDI较A,C类增长14%~118%,其CEI降低20%~53%,拌和次序对压实参数存在显著的影响;B类拌和次序混合料的蠕变斜率相对较低,其高温性能相对良好;压实参数与蠕变斜率存在一定的相关性;在3种拌和次序下,70~#沥青再生混合料的蠕变斜率分别比90~#低37%,38%和37%,表明70~#沥青再生混合料的高温性能均优于90~#.
[Abstract]:Hot recycled asphalt mixture was formed by 3 different mixing order (A, B, C) and 2 label (70~#, 90~#) asphalt mixture. The change of the compaction parameters (CDI, CEI) of the hot recycled asphalt mixture in the forming process was analyzed by the rotating compacting molding instrument SGC. The creep deviation of the mixture in the wheel rolling process was analyzed by the hamburger rutting instrument. The effect of the mixing sequence on the high temperature performance of the hot recycled asphalt mixture was evaluated. The experimental results showed that the CDI of B class mixing sequence was more than A, C was 14%~118%, the CEI decreased 20%~53%, and the mixing order had a significant influence on the compaction parameters; the creep slope of the mixing order mixture of B class was relatively low, and its high temperature performance was relatively good; compaction was relatively good; compaction was relatively good; compaction was relatively good; compaction was relatively good; compaction was relatively good; compaction was relatively good; compaction was relatively good; compaction compaction was relatively good; compaction compaction was relatively good; compaction compaction was relatively good; compaction compaction was relatively good; compaction compaction There is a certain correlation between the parameters and the creep slope. Under the 3 mixing order, the creep slope of 70~# asphalt regenerated mixture is 37% lower than that of 90~#, 38% and 37%, indicating that the high temperature performance of 70~# asphalt regenerated mixture is better than that of 90~#..
【作者单位】：长安大学道路结构与材料交通行业重点实验室;密歇根理工大学土木与环境工程系;
【基金】：国家自然科学基金资助项目(51578075) 交通运输部应用基础研究计划项目(2014319812180)
【分类号】：U416.26

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