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首页> 外文期刊>Road materials and pavement design >Application of a high percentage of reclaimed asphalt pavement in an asphalt mixture: blending process and performance investigation
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Application of a high percentage of reclaimed asphalt pavement in an asphalt mixture: blending process and performance investigation

机译：高百分比的再生沥青路面在沥青混合料中的应用：掺合工艺和性能研究

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This study performed a laboratory investigation of applying a high percentage of reclaimed asphalt pavement (RAP, up to 50%) in an asphalt mixture. The properties of aged binder were first determined and the rejuvenator and SBR latex were used to restore the binder properties. The optimum dosages of the rejuvenator and SBR additive are 2% and 4% of aged binder mass, respectively. Then the preheating temperatures of aggregate were determined according to the RAP content to meet the mixture temperature requirement. The effects of the blending process, especially the feeding sequence of materials, on the mixture performances were investigated to recommend the optimum blending process. The water durability, low-, high-temperature and fatigue performances of the mixture containing 30%, 40% and 50% RAP were examined and it was found that with the further addition of polyester fibre, the performances of an asphalt mixture containing 50% RAP can satisfy the engineering requirement.
机译：这项研究进行了一项实验室调查，在沥青混合物中使用高百分比的再生沥青路面（RAP，最高可达50％）。首先确定老化粘合剂的性能，然后使用再生剂和SBR胶乳恢复粘合剂性能。再生剂和SBR添加剂的最佳用量分别为老化粘合剂质量的2％和4％。然后根据RAP含量确定骨料的预热温度，以满足混合物温度的要求。研究了混合过程，特别是物料的进料顺序对混合物性能的影响，以建议最佳的混合过程。检查了含有30％，40％和50％RAP的混合物的水耐久性，低温，高温和疲劳性能，发现进一步添加聚酯纤维后，含有50％RAP的沥青混合物的性能RAP可以满足工程要求。

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