| 摘要: |
| 采用乳化沥青、水性环氧树脂及固化剂制备了不同配比（质量比）的共混物，通过室内试验分析了共混物的力学性能、凝胶特性及流变行为，并采用荧光显微镜和红外光谱分析仪对共混物的微观相结构和共混机理进行了分析.结果显示：在水泥试块上刷涂乳化沥青与环氧树脂配比为5∶5的共混物后，水泥试块在25，45℃下的拉拔强度最大值分别为337，198MPa；当乳化沥青与环氧树脂的配比为5∶3时，共混物的拉伸强度和断裂伸长率分别为347MPa和38%，且均出现拐点；共混物的凝胶时间随温度和环氧树脂比例的增加而缩短，当乳化沥青与环氧树脂的配比为5∶5时，其50℃的凝胶时间缩短为10min左右；共混物的相结构随环氧树脂比例的增加而改变，当乳化沥青与环氧树脂的配比为5∶3时，其相结构发生逆转，环氧树脂为连续相，乳化沥青为分散相；共混物的储能模量、损耗模量和玻璃化转变温度均随环氧树脂比例的增加而增大，当乳化沥青与环氧树脂的配比为5∶3时其玻璃化转变温度最大为70℃；共混物的共混方式为物理共混.建议乳化沥青与环氧树脂的配比不宜超过5∶3. |
| 关键词: 共混物 力学性能 凝胶特性 相结构 流变行为 共混机理 |
| DOI：103969/j.issn.1007 9629201803011 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51702282);重庆市科委民生创新专项(cstc2016shmszx30020) |
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| Feature Analysis of Waterborne Epoxy Resin Emulsified Asphalt Blend |
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ZHOU Qiwei1, LING Tianqing1, HAO Zengheng2, WU Xueliu2, LI Lu2, XU Guanghong2
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1.School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China;2.Chongqingshi Zhixiang Paving Technology Engineering Co., Ltd., Chongqing 400067, China
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| Abstract: |
| Emulsified asphalt, waterborne epoxy resin and curing agent were prepared by mixing in different proportion，and the mechanical properties, gel properties and rheological behavior of the blend were studied through indoor test，microscopic phase structure and blending mechanism of blend are clarified by fluorescent microscope and infrared spectrum analysis. The results show that when the mass ratio of emulsified asphalt and waterborne epoxy resin is 5∶5, the max drawing strength at 25℃ and 45℃ are 337MPa and 198MPa respectively; when the mass ratio of emulsified asphalt and waterborne epoxy resin is 5∶3，tensile strength is 347MPa，elongation at break is 38%，and both of them are in a turning point; gel time is shortened with the increase of temperature and epoxy resin content, when the mass ratio of emulsified asphalt and waterborne epoxy resin is 5∶5, gel time is about 10min in 50℃; phase structure of blend will change with the increase of epoxy resin content, when the mass ratio of emulsified asphalt and waterborne epoxy resin is 5∶3, phase reversal takes place, epoxy resin as the continuous phase, emulsified asphalt as the dispersed phase; storage modulus, loss modulus and glass transition temperature of the blend are increased with the increase of epoxy resin content, when the mass ratio of emulsified asphalt and waterborne epoxy resin is 5∶3, all of them were the maximum, glass transition temperature is 70℃；the blending way is physical blending through the infrared spectrum analysis, so the mass ratio of emulsified asphalt and epoxy resin is not more than 5∶3. |
| Key words: blend mechanical property gel property phase structure rheological behavior mechanism of blending |
