生物基温拌再生沥青及其混合料性能研究Study on Properties of Bio-based Warm Mix Recycled Asphalt and its Mixture
周家鹏
摘要(Abstract):
本研究针对公路养护中废旧沥青混合料(RAP)难以高效利用及传统热再生工艺能耗大、污染环境等问题,制备了一种新型生物基温拌再生剂(PS)。通过沥青层面试验,加入PS后,老化沥青的针入度提升,接近70#基质沥青水平,15℃延度恢复至新沥青的69%,软化点接近新沥青水平,据此确定其在老化沥青中的最佳掺量为8%。掺入50%的RAP材料,设计AC-13温拌再生沥青混合料,确定最佳油石比为4.8%。路用性能试验结果表明,温拌再生沥青混合料的马歇尔稳定度与基质混合料相当,浸水马歇尔残留稳定度和冻融劈裂残留强度比基质沥青混合料稍低,但满足规范要求,且材料在高温和低温性能方面较70#基质沥青表现更佳,展现出较好的综合路用性能。
关键词(KeyWords): 道路工程;生物基温拌再生剂;温拌再生沥青;温拌再生沥青混合料;路用性能
基金项目(Foundation):
作者(Author): 周家鹏
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