单纤维及复合纤维增强热再生沥青混合料性能研究  

Study on the Performance of Single Fiber and Composite Fiber Reinforced Hot Recycled Asphalt Mixture

作　　者：柴达标 CHAI Dabiao(China Railway 18th Bureau Group the Fourth Engineering Co.,Ltd.,Tianjin 300350,China)

机构地区：[1]中铁十八局集团第四工程有限公司,天津300350

出　　处：《路基工程》2025年第2期114-120,共7页Subgrade Engineering

摘　　要：基于路用性能试验、四点弯曲疲劳试验和APA试验,研究木质素纤维、聚酯纤维、玄武岩纤维3种单纤维及5组复合纤维增强热再生沥青混合料的综合路用性能与疲劳特性,并基于扫描电镜试验分析不同纤维的改性机理。结果表明:在0.35%总掺量条件下,玄武岩纤维改性热再生沥青混合料具有最优的高温稳定性,聚酯纤维对热再生沥青混合料的低温抗裂性能改善最明显;木质素纤维、聚酯纤维、玄武岩纤维的掺配比例为1:1:2时,复合纤维改性沥青混合料的高温稳定性、低温抗裂性能和抗疲劳性能均最优。Based on the road performance test,four-point bending fatigue test and APA test,the paper studied the comprehensive road performance and fatigue characteristics of three kinds of single fibers(lignin fiber,polyester fiber and basalt fiber)and five kinds of composite fiber reinforced hot recycled asphalt mixture,and the modification mechanism of different fibers was analyzed based on scanning electron microscope test.The result shows that,under the condition of 0.35%dosage,basalt fiber modified hot recycled asphalt mixture presents the optimum high-temperature resistance stability,and polyester fiber fulfills the most obvious improvement on the low temperature crack resistance of hot recycled asphalt mixture.When the blending ratio of lignin fiber,polyester fiber and basalt fiber is 1:1:2,we can get the best of the high-temperature resistance stability,low temperature crack resistance and fatigue resistance of the composite fiber modified asphalt mixture.

关 键 词：路面工程 沥青混合料 纤维掺量 复配 叠加 路用性能 稳定性 

分 类 号：U416.2[交通运输工程—道路与铁道工程]