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Laboratory Performance of Hot Mix Asphalt with High Reclaimed Asphalt Pavement (RAP) and Fine Reclaimed Asphalt Pavement (FRAP) Content

机译:高再生沥青路面(RAP)和细再生沥青路面(FRAP)含量的热拌沥青的实验室性能

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摘要

Recently, there has been an increasing interest in the applications of recycled mixtures with a high reclaimed asphalt pavement (RAP) content. However, many government departments are hesitant about the applications of that due to being worried about the durability of its pavement, and few findings has been reported in terms of the percentage of fine reclaimed asphalt pavement (FRAP, 0~5 mm) in recycled mixtures. In this paper, 25% or more RAP by the weight of aggregates is defined as high RAP and high FRAP refers to 10% or more FRAP by the weight of aggregates. This paper examines the laboratory performances of mixtures with high RAP (30%, 40%, and 50%) and FRAP (10%, 15%, and 20%). Performance evaluations have been conducted by conventional tests, including the low-temperature bending test, fatigue test, and the moisture susceptibility test. The results show that with the increasing RAP and FARP contents, 41% (30-R-10) to 63% (50-R-15) of virgin asphalt can be saved, both the low-temperature and fatigue performance decrease, and the moisture performance firstly increases and then decreases. The results of analysis of variance (ANOVA) in terms of low-temperature and moisture performance show that RAP contents in recycled mixtures have a significant effect on the performance, while the effect of FRAP contents on the performance of recycled mixtures is insignificant.
机译:近来,人们对具有高再生沥青路面(RAP)含量的再循环混合物的应用越来越感兴趣。但是,由于担心路面的耐久性,许多政府部门对这种方法的使用感到犹豫,关于再生混合物中细料再生沥青路面(FRAP,0〜5 mm)的百分比的报道很少。 。在本文中,以骨料重量计25%或以上的RAP被定义为高RAP,而高FRAP是指以骨料重量计10%或以上的FRAP。本文研究了具有高RAP(30%,40%和50%)和FRAP(10%,15%和20%)的混合物的实验室性能。已经通过常规测试进行了性能评估,包括低温弯曲测试,疲劳测试和湿气敏感性测试。结果表明,随着RAP和FARP含量的增加,可以节省41%(30-R-10)至63%(50-R-15)的原始沥青,降低了低温和疲劳性能,并且降低了疲劳强度。湿气性能先升高然后降低。低温和湿气性能方差分析(ANOVA)的结果表明,再生混合物中RAP含量对性能有重大影响,而FRAP含量对再生混合物性能的影响不明显。

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