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首页> 外文期刊>Journal of Cleaner Production >Experimental study of high modulus asphalt mixture containing reclaimed asphalt pavement
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Experimental study of high modulus asphalt mixture containing reclaimed asphalt pavement

机译：高模量沥青混合物含有回收沥青路面的实验研究

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This paper examines performance of high modulus asphalt mixture containing reclaimed asphalt pavement (RAP). Low penetration grade asphalt binder #30 was used to produce high modulus asphalt mixture containing RAP. Marshall mix design method was used to prepare specimen and EME (Enrobe a Module Eleve) method was incorporated. To address the variance of RAP gradation and poor bonding between stiff virgin binder and aged binder, a modified regeneration method was proposed in this study and was compared with traditional method. Performance of the mixture was examined with lab tests including Marshall stability and flow test, dynamic modulus test, bending test, Marshall immersion test and modified Lottman test. The results indicated that modified method produced more compacted, more stable mixture than traditional method, while low-temperature performance is still below standard. Specimens with different RAP content were prepared and tested to evaluate the effect of RAP content. It was found that 40% RAP produced optimal mixture in terms of dynamic modulus values and moisture damage susceptibility, while low-temperature performance is insensitive to RAP content. Scanning Electron Microscope (SEM) test was conducted to evaluate bonding between binder and aggregate from the micro structural perspective. The results support that modified method improves the bonding between virgin binder and RAP as well as virgin aggregate. (C) 2020 Elsevier Ltd. All rights reserved.
机译：本文研究了含有再生沥青路面（RAP）的高模量沥青混合物的性能。低渗透级沥青粘合剂＃30用于生产含有RAP的高模量沥青混合物。 Marshall混合设计方法用于制备标本和EME（enRobe模块ELEVE）方法。为了解决僵硬的原始粘合剂和老化粘合剂之间的RAP渐变和粘接性差的变化，本研究提出了一种改性再生方法，并与传统方法进行了比较。使用实验室测试检查混合物的性能，包括Marshall稳定性和流量测试，动态模量试验，弯曲试验，Marshall浸渍试验和改性劳务测试。结果表明，改性方法比传统方法生产更压实，更稳定的混合物，而低温性能仍然低于标准。制备具有不同RAP含量的标本并测试以评估RAP含量的影响。发现40％RAP在动态模量值和湿度损伤易感性方面产生了最佳混合物，而低温性能对RAP含量不敏感。进行扫描电子显微镜（SEM）试验以评估粘合剂和微结构角度之间的粘合剂和聚集体。结果支持改性方法改善了原始粘合剂和RAP与rap和原始骨料之间的粘合。 （c）2020 elestvier有限公司保留所有权利。

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