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胶粉对高掺量SBS改性沥青性能的影响研究
作者：毛三鹏1，2，何炎衡2，郝亚苹1，曾尚恒2，韩晓斌2，余剑英2
（1.中石油燃料油有限责任公司研究院，北京 100195；
2.武汉理工大学 材料科学与工程学院，湖北 武汉 430070）
摘要：研究了胶粉对防水材料用高掺量SBS改性沥青性能的影响。结果表明：随胶粉掺量增加，高掺量SBS改性沥青的软化点和黏度升高，低温柔度降低，胶粉掺量超过12%时，黏度增幅和低温柔度降幅明显加快；热氧和紫外老化后，掺加胶粉的高掺量SBS改性沥青的软化点增量、黏度增量和低温柔度变化均明显减小，表现出更好的抗老化性能；FTIR分析表明，随胶粉掺量增加，在热氧和紫外老化后高掺量SBS改性沥青中的C=O生成量和C=C减少量均减少，有效抑制了沥青的氧化缩聚和SBS的降解。
关键词：SBS改性沥青；胶粉；物理性能；老化性能
中图分类号：TU57+3 文献标识码：A 文章编号：1001-702X（2022）05-0129-04
Effect of crumb rubber on properties of high dosage SBS modified asphalt
MAO Sanpeng1，2，HE Yanheng2，HAO Yaping1，ZENG Shangheng2，HAN Xiaobin2，YU Jianying2
（1.Research Institute of Petro China Fuel Oil Co. Ltd.，Beijing 100195，China；
2.School of Materials Science and Engineering, Wuhan University of Technology，Wuhan 430070，China）
Abstract：The effects of crumb rubber on the properties of high-dosage SBS modified asphalt for waterproof were investigated. The results revealed that with the increase of crumb rubber dosage，the softening point and viscosity of crumb rubber/SBS modified asphalt were enhanced，while the low-temperature flexibility became better. When crumb rubber dosage exceeded 12% by the mass of asphalt，the viscosity of crumb rubber/SBS modified asphalt increased significantly and the low-temperature flexibility improved obviously. After thermal-oxidative and ultraviolet aging，the variation range of softening point increment，viscosity increment and low temperature flexibility of high-dosage SBS modified asphalt containing crumb rubber decreased significantly，showing better aging resistance. Also，FTIR analysis showed that the content of C=O formation and C=C reduction of high-dosage SBS modified asphalt decreased with the increase of crumb rubber dosage after aging，indicating that crumb rubber could effectively inhibit the oxidative polycondensation of asphalt and the degradation of SBS.
Key word：SBS modified asphalt，crumb rubber，physical properties，aging properties