热拌环氧基改性沥青的最佳制备工艺  

The Optimal Preparation Process of Hot Mix Epoxy Modified Asphalt

作　　者：许夏荧 范沈诚 李晶[2] 张丰雷 XU Xia-ying;FAN Shen-cheng;LI Jing;ZHANG Feng-lei(Guangxi Hetian Expressway Co.Ltd.,Nanning 530022,China;School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China;National&Local Joint Engineering Research Center of Transportation Civil Engineering Materials,Chongqing Jiaotong University,Chongqing400074,China)

机构地区：[1]广西河田高速公路有限公司,南宁市530022 [2]广西大学化学化工学院,南宁市530004 [3]重庆交通大学交通土木工程材料国家与地方联合工程研究中心,重庆市400074

出　　处：《公路》2024年第12期86-92,共7页Highway

基　　金：国家自然科学基金项目,项目编号52368057。

摘　　要：采用正交试验对热拌环氧基改性沥青的最佳制备工艺进行确定,使用4因素3水平的试验方法,通过直观分析法和方差分析法对断裂应力和断裂应变两个指标进行结果分析。进一步讨论每种分析方法下对应各个因素的贡献水平,结合两种结果在实际应用中的表现形式,最终确定了最佳制备工艺为高温固化温度150℃、高温固化时间1.5 h、低温固化温度60℃、低温固化时间4 d。采用最佳制备工艺条件对环氧沥青的不同制备阶段进行荧光显微观察,了解不同固化阶段环氧沥青的微观形貌。固化反应最终使得环氧沥青形成以基质沥青为分散相、环氧树脂为连续相的稳定结构,并保持良好的力学性能。The orthogonal experiment are carried out to determine the optimal preparation process for hot-mixed epoxy-modified asphalt,a four-factor three-level experimental method is employed to conduct intuitive analysis and analysis of variance so as to analyze the results for two indicators:fracture stress and fracture strain.Furthermore,the contribution levels of each factor under each analysis method are discussed,and the optimal preparation process is ultimately determined to be a high-temperature curing temperature of 150℃,a high-temperature curing time of 1.5 hours,a low-temperature curing temperature of 60℃,and a low-temperature curing time of 4 days.The optimal preparation conditions are used to observe the microstructure of epoxy asphalt at different curing stages using fluorescence microscopy,providing insight into the microstructure of epoxy asphalt at different curing stages.The curing reaction ultimately result in the formation of a stable phase structure with matrix asphalt as the dispersed phase and epoxy resin as the continuous phase,while maintaining good mechanical properties.

关 键 词：热拌环氧沥青 正交试验 宏观拉伸 微观荧光显微 

分 类 号：U414.75[交通运输工程—道路与铁道工程]