添加复合纤维沥青混合料性能优化研究  

On the Performance Optimization of Adding Composite Fiber Asphalt Mixture

作　　者：孙晨浩 黄骆莹 SUN Chenhao;HUANG Luoying(CCCC Second Highway Consultants Co.,Ltd.,Wuhan 430056,China)

机构地区：[1]中交第二公路勘察设计研究院有限公司,武汉430056

出　　处：《路基工程》2025年第1期121-126,共6页Subgrade Engineering

摘　　要：将木质素纤维与玄武岩纤维复合纤维添加到硬质沥青混合料中制备高模量沥青混凝土,基于直接剪切试验优化木质素纤维与玄武岩纤维掺量及掺配比例,通过车辙试验、低温弯曲试验与冻融劈裂试验分析掺加复合纤维对硬质沥青混合料高、低温性能与水稳定性的增强作用。结果表明:将木质素纤维与玄武岩纤维进行复配,能较好实现两种纤维对硬质沥青黏度和抗剪切性能增强效果的叠加作用,以直接剪切试验峰值剪切强度确定木质素纤维与玄武岩纤维的最佳复配比例为1∶2,复合纤维的最佳掺量为8.0%。掺加木质素纤维与玄武岩纤维的硬质高模量沥青混合料具有优异的抗车辙性能、高低温路用性能、水稳定性。High modulus asphalt concrete was prepared by adding lignin fiber and basalt fiber to hard asphalt mixture.The content and proportion of lignin fiber and basalt fiber were optimized based on direct shear test.The enhancement effect of adding composite fiber on high and low temperature properties and water stability of hard asphalt mixture was analyzed through rut test,low temperature bending test and freeze-thaw splitting test.The results show that the superposition effect of lignin fiber and basalt fiber on the viscosity and shear resistance of hard asphalt can be achieved by compounding lignin fiber and basalt fiber.The optimal ratio of lignin fiber and basalt fiber is 1∶2 and the optimal content of composite fiber is 8.0%according to the peak shear strength of direct shear test.The hard high modulus asphalt mixture mixed with lignin and basalt fiber has excellent rutting resistance,high and low temperature road performance and water stability.

关 键 词：沥青路面 复合纤维 配比优化 高模量 性能增强 

分 类 号：U414.2[交通运输工程—道路与铁道工程]