旧沥青混合料再生剂应用效果评价

Evaluation of rejuvenator’s effectiveness on the reclaimed asphalt pavement incorporated stone matrix asphalt mixtures

本文将废植物油作为复壮剂掺入SMA沥青混合料。为了确定最大RAP含量和最佳WVO用量,采用四种RAP含量和四种WVO用量制备SMA混合料。进行了实验室试验,以评估其体积特性、马歇尔特性、剥离行为、残余马歇尔稳定性和拉伸强度比,并对它们进行了统计比较。结果表明,掺入RAP的形状记忆合金对材料的体积性能有显著的正向影响,提高了材料的马歇尔稳定性、剥离阻力,但降低了材料的tsr值。相反,WVO的加入在很大程度上提高了tsr值,增加了RAP的含量。方差分析结果表明,RAP含量和WVO用量对形状记忆合金的性能有显著影响,主效应图结果表明,在形状记忆合金中加入40%的RAP含量和6%的wvo是可行的。

In order to determine the maximum RAP content and optimum WVO dosage,four RAP contents and four WVO dosages are used to prepare the SMA mixtures.The laboratory tests were conducted to evaluate drain down,volumetric properties,Marshall characteristics,stripping behavior,Retained Marshall Stability,and Tensile Strength Ratio and they are compared statistically to each other and to the control mixture.The results indicate that RAP incorporated SMA mixtures have a substantial positive effect on the volumetric properties and it enhanced the Marshall Stability,stripping resistance and RMS,however,reduced the TSR value.To the contrary,the addition of the WVO improved the TSR value to a great extent and increased the RAP content.The statistical analysis,Analysis of Variance results,showed that the RAP content and WVO dosage have a significance on the properties of the SMA,and the main effect plot results concluded that it is possible to incorporate 40%of RAP content with 6%WVO in the SMA mixtures.