首页> 外文会议>Asphalt Rubber 2009 Conference(2009国际橡胶沥青大会) >Characterization of HMA Mixtures ontaining High Reclaimed Asphalt Pavement Content With Crumb Rubber Additives
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Characterization of HMA Mixtures ontaining High Reclaimed Asphalt Pavement Content With Crumb Rubber Additives

机译:含粒状橡胶添加剂的HMA混合料达到高再生沥青路面含量的特性

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This paper presents the findings of laboratory characterization of HMA mixtures containing high reclaimed asphalt pavement (RAP) content with crumb rubber (CR) additives. Six mixtures were examined in this study. Three were conventional mixtures containing an unmodified asphalt cement binder and styrenebutadiene-styrene polymer modified asphalt cement, Performance Grade (PG) 64-22, PG 70-22, and PG 76-22 respectively. The fourth mixture contains no RAP, 30 mesh CR additives blended (wet process) with a PG 64-22 binder. The fifth mixture contains 15 percent RAP and PG 76-22 asphalt cement binder The final mixture contains 40 percent RAP, 30 mesh CR additives blended (dry process) with a PG 64-22 asphalt cement binder. Laboratory mixture characterization includes the asphalt mixture performance tests (dynamic modulus, E*, and flow number, FN), semi-circular bend test, dissipated creep strain energy test, and the modified Lottman test. Mixtures containing high RAP content and CR additives exhibited similar performance as conventional mixture with PG 76-22 binder.
机译:本文介绍了含有高再生沥青路面(RAP)含量和碎胶(CR)添加剂的HMA混合物的实验室表征结果。在这项研究中检查了六种混合物。三种是常规混合物,分别包含未改性的沥青水泥粘合剂和苯乙烯丁二烯-苯乙烯聚合物改性的沥青水泥,分别为Performance Grade(PG)64-22,PG 70-22和PG 76-22。第四种混合物不包含RAP,将30目CR添加剂与PG 64-22粘合剂混合(湿法)。第五混合物包含15%的RAP和PG 76-22沥青水泥粘合剂。最终混合物包含40%的RAP,30目CR添加剂与PG 64-22沥青水泥粘合剂混合(干法)。实验室混合料的表征包括沥青混合料的性能测试(动态模量E *和流量FN),半圆弯曲测试,耗散蠕变应变能测试以及改进的Lottman测试。含有高RAP含量和CR添加剂的混合物表现出与具有PG 76-22粘合剂的常规混合物相似的性能。

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