木焦油基再生沥青混合料耐久性能研究  

Durability of Wood Tar-based Rejuvenated Asphalt Mixture

作　　者：刘克非[1] 张雪飞 蒋康 吴超凡 LIU Ke-fei;ZHANG Xue-fei;JIANG Kang;WU Chao-fan(Institute of Southern Green Road,Central South University of Forestry and Technology,Changsha 410004,China;Hunan Communications Research Institute Co.Ltd.,Changsha 410015,China;Hunan Provincial Engineering Research Center for Construction Solid Wastes Recycling,Changsha 410205,China)

机构地区：[1]中南林业科技大学南方绿色道路研究所,长沙市410004 [2]湖南省交通科学研究院有限公司,长沙市410015 [3]湖南省建筑固废资源化利用工程技术研究中心,长沙市410205

出　　处：《公路》2021年第6期308-312,共5页Highway

基　　金：湖南省重点领域研发计划项目,项目编号2019GK2244;湖南省教育厅科学研究项目,项目编号18A176;湖南省交通运输厅科技进步与创新计划项目,项目编号201731;长沙市科技计划项目,项目编号kq1801081;长沙市雨花区科技计划项目,项目编号YHKJ-2018-ZG-20。

摘　　要：为探究木焦油基再生沥青混合料的耐久性能,采用老化试验、四点弯曲疲劳试验和冻融劈裂试验对基质沥青混合料、木焦油基再生沥青混合料和RA-102再生沥青混合料的疲劳耐久性、冻融循环耐久性和老化耐久性进行试验研究。研究结果表明:木焦油基再生剂有利于减缓疲劳应力、冻融循环和老化作用对沥青混合料性能的劣化作用;木焦油基再生沥青混合料具有良好的疲劳耐久性、冻融循环耐久性和老化耐久性,其水稳定性能优越,可有效延长道路使用寿命;木焦油与生物质纤维的协同作用可有效缓和沥青与集料间的黏附失效,提高混合料的力学强度和抗渗性能,从而提高混合料的耐久性。To study the durability of wood tar-based rejuvenated asphalt mixture,the fatigue durability,freeze-thaw cycle durability and aging durability of base asphalt mixture,wood tar-based rejuvenated asphalt mixture and RA-102 rejuvenated asphalt mixture are studied by aging test,four-point bending fatigue test and freeze-thaw splitting test.The results show that wood tar-based rejuvenator is beneficial to mitigate the deterioration of fatigue stress,freeze-thaw cycle and aging on the performance of asphalt mixture.Wood tar-based rejuvenated asphalt mixture has good fatigue durability,freeze-thaw cycle durability and aging durability,and its water stability is superior,which can effectively extend the service life of the road.The synergistic effect of wood tar and biomass fiber can effectively alleviate the adhesion failure between asphalt and aggregate,improve the mechanical strength and impermeability of the mixture,and thus enhance the durability of the mixture.

关 键 词：道路工程 木焦油 再生沥青混合料 耐久性能 生物质纤维 

分 类 号：U414.01[交通运输工程—道路与铁道工程]