不同纤维增韧环氧沥青混合料性能  

Performance of epoxy asphalt mixtures toughened with different fibers

作　　者：肖鹏[1] 陈家骏 康爱红[1] 孔贺誉 邓续康 张垚 XIAO Peng;CHEN Jiajun;KANG Aihong;KONG Heyu;DENG Xukang;ZHANG Yao(College of Civil Science and Engineering,Yangzhou University,Yangzhou 225009,China)

机构地区：[1]扬州大学建筑科学与工程学院,江苏扬州225009

出　　处：《实验技术与管理》2024年第1期52-56,共5页Experimental Technology and Management

基　　金：国家自然科学基金项目(52178439);江苏省学位与研究生教育教学改革课题(JGKT23_C088);博士后创新人才支持计划(BX20230302)。

摘　　要：为探究不同种类纤维(玄武岩纤维、玻璃纤维和聚酯纤维)对环氧沥青混合料抗开裂和耐疲劳性能的提升效果,在混合料配比设计的基础上,采用车辙试验、低温小梁试验、浸水马歇尔试验以及冻融劈裂试验等对其进行路用性能测试。通过冲击试验,探究纤维对环氧沥青混合料的三种增韧效果:在环氧沥青混合料中添加纤维可以不同程度提高其路用性能;低温性能再加入纤维后,提升效果较为明显;添加玄武岩纤维路用性能优于玻璃纤维和聚酯纤维。[Objective]Epoxy asphalt mixtures are primarily used in pavements of long-span steel bridge decks.The heavy load traffic and orthotropic structural characteristics of steel bridge decks require epoxy asphalt mixtures with high deformation performance,material strength,and fatigue performance.The issues encountered with epoxy asphalt mixtures include ecracking and fatigue damage.Due to the high hardness and strength of epoxy asphalt mixtures,when the steel bridge deck deforms under sea wind loads,the internal stress of the material cannot be fully transmitted.Over time,microcracks can develop within the materialunder heavy traffic and vehicle loads.This results indeclined durability and causes cracks,pits,and other deformations,leading to functional impairment of the pavement layer.Therefore,we propose incorporating fibers to enhance the cooperative deformation capacity and service life of epoxy asphalt mixtures.[Methods]In this paper,the epoxy asphalt mixture was reinforced to satisfy the requirements of anticracking,antifatigue,etc.,and the reinforcing effects of different fibers(basalt fiber,glass fiber,and polyester fiber)on the epoxy asphalt mixture were studied.First,tensile tests were performed on epoxy asphalt to determine its construction temperature and elongation at break.Using the Marshall test,the mixture design of EA-10 epoxy asphalt mixtures with basalt,glass,and polyester fibers and without fiber was conducted to measure the mineral composition and optimal oil–stone ratio of the four EA-10 epoxy asphalt mixtures.The research findings revealed that the retention time and tensile strength of epoxy asphalt satisfy the engineering requirements,and the optimal oil–stone ratios of the epoxy asphalt mixture without fiber and with basalt,glass,and polyester fibers are 6.5%,6.7%,6.6%,and 6.8%,respectively.Second,the road performance of the four EA-10 epoxy asphalt mixtures was examined by rutting,low-temperature small beam,immersed Marshall,and freeze–thaw splitting tests.Compared with the mixture wit

关 键 词：环氧沥青 纤维环氧沥青混合料 增韧技术 抗裂性能 路用性能 

分 类 号：U414[交通运输工程—道路与铁道工程]