不同交联度环氧树脂沥青的动态力学性能  

Dynamic mechanical property of epoxy resin asphalt in different crossing-density

作　　者：郭建 闵召辉[2] 张占军[2,3] 孔冬雷[2] 

机构地区：[1]南京市住房和城乡建设委员会,江苏南京210024 [2]东南大学智能运输系统研究中心,江苏南京210096 [3]北京路桥中咨科技有限公司,北京100101

出　　处：《长安大学学报（自然科学版）》2011年第6期26-30,共5页Journal of Chang’an University(Natural Science Edition)

基　　金：国家自然科学基金项目(50878053)

摘　　要：采用4种不同交联程度的环氧树脂沥青材料,在-30℃～70℃温度区间以固定10Hz频率进行动态热机械性能(DMA)分析。研究结果表明:在-30℃～70℃温度区间,交联度高的环氧树脂沥青材料可以分成玻璃态、过渡态和橡胶态,交联度低的环氧树脂沥青材料仅呈现出玻璃态和过渡态;该温度区间内,损耗模量与损耗角正切均为单峰,其峰值均随着交联度的提高而降低;储能模量转变温度和损耗模量峰值温度二者之间基本相当,损耗角正切峰值温度较前2种温度高出14℃～17℃;拉伸试件断面的SEM显微照片显示,交联度高环氧树脂沥青试件断裂面平整光滑,交联度低环氧树脂沥青试件断裂面不规则,可以清晰观察到断裂的交联纤维段。Cured epoxy resin asphalt specimens with four kinds of crossing density were analyzed by DMA（dynastic mechanics analyzer） with 10 Hz frequency in temperature range from-30 ℃ to 70 ℃.The results show that high crossing density specimens present glass state,transition state and rubbery state in temperature range from-30 ℃ to 70 ℃,while glass state,transition state for low crossing density material.The curves of loss modulus and loss tangent show single peak for either high or low crossing density material.The glass transition temperatures deduce from curves of storage modulus and loss modulus are consistent,the range from 14 ℃ to 17 ℃ lower than that from curves of loss tangent,the SEM（scanning electron microscope） observation shows that the section appeares irregular with broken crossing thread for low crossing density specimens,while smooth for those with high crossing density.

关 键 词：道路工程 环氧树脂沥青 交联度 动态力学性能 

分 类 号：U414[交通运输工程—道路与铁道工程]