环氧沥青混合料耐酸雨侵蚀性能及作用机理研究  

Study on acid rain resistance and mechanism of epoxy asphalt mixture

作　　者：朱俊材 蒋康 吴超凡 刘克非[1] Zhu Juncai;Jiang Kang;Wu Chaofan;Liu Kefei(Institute of Southern Green Road,Central South University of Forestry and Technology,Changsha 410004;Hunan Vocational College of Engineering,Changsha 410151;Hunan Communications Research Institute Co.,Ltd.,Changsha 410015;Hunan Provincial Engineering Research Center for Construction Solid Wastes Recycling,Changsha 410205)

机构地区：[1]中南林业科技大学南方绿色道路研究所,长沙410004 [2]湖南工程职业技术学院,长沙410151 [3]湖南省交通科学研究院有限公司,长沙410015 [4]湖南省建筑固废资源化利用工程技术研究中心,长沙410205

出　　处：《化工新型材料》2021年第11期176-182,共7页New Chemical Materials

基　　金：湖南省重点领域研发计划项目(2019GK2244);湖南省交通运输厅科技进步与创新计划项目(201731)

摘　　要：为探究环氧沥青混合料的耐酸雨侵蚀性能及作用机理,采用周期干湿循环浸泡实验、接触角实验和路用性能实验对环氧沥青混合料、SBS改性沥青混合料和70^(#)基质沥青混合料的耐酸雨侵蚀性能进行研究。结果表明,酸雨可显著降低沥青的粘附性、沥青混合料的路用性能和老化耐久性。与SBS改性沥青和70^(#)基质沥青相比,环氧沥青与集料间的粘附性最优,其混合料的耐酸雨侵蚀能力最强,且可应用于OGFC沥青混合料。环氧沥青具有的极性基团、高强内聚力和低收缩率的热固性树脂可使其粘附性增强,从而有效抵御水分的侵蚀、剥落和温度应力开裂。废橡胶粉和改性竹纤维的加入可使环氧沥青混合料中的"结构沥青"增多、空隙率降低而具有良好的致密性,形成的空间网络结构可起"加筋"和"增韧"作用,进一步增强混合料的力学性能、抗渗性能和耐酸雨侵蚀能力。To research the acid rain resistance and mechanism of epoxy asphalt mixture,the acid rain resistance of epoxy asphalt mixture,SBS modified asphalt mixture and 70^(#)base asphalt mixture were studied by wet and dry cyclic immersion test,contact angle test and road performance test.The results shown that acid rain can significantly reduce the adhesion of asphalt,and the road performance and aging durability of asphalt mixture.Epoxy asphalt had the best adhesion with the aggregate,and its mixture had the strongest acid rain resistance,and can be used in OGFC asphalt mixture.The epoxy asphalt had the polar groups,high-strength cohesion and low-shrinkage thermosetting resins that can enhance its adhesion,thereby effectively resisting water erosion,spalling and temperature stress cracking.With the addition of waste rubber powder and modified bamboo fiber,the"structural asphalt"in the epoxy asphalt mixture increased,the void ratio decreased,and it had good compactness.The spatial network structure formed can play the role of"reinforcement"and"toughening",further enhancing the mechanical properties,impermeability and acid rain resistance of the mixture.

关 键 词：道路工程 环氧沥青混合料 酸雨侵蚀 粘附性 混合料类型 

分 类 号：U414[交通运输工程—道路与铁道工程]