摘要
随着我国交通运输事业的快速发展,废旧轮胎产生量激增,“黑色污染”问题日益严峻。在该背景下,将废旧轮胎加工为胶粉并应用于沥青改性,既能实现资源循环利用,又能提升沥青路面性能。为了深入阐释其改性机理与路用性能,为我国废旧轮胎资源化利用产业链的完善与绿色交通基础设施建设提供技术支撑,以橡胶沥青为研究对象,并以70号道路石油沥青与SBS改性沥青为参照。通过微观表征与宏观性能测试相结合的方法,系统地探究了橡胶沥青的元素组成、分子作用机理、热稳定性及其在宽温域(-24~100℃)区间内的流变性能和疲劳特性。研究结果表明:与70号道路石油沥青和SBS改性沥青相比,橡胶沥青中的S、N、O等元素占比更高,其为物理共混且形成了三维网络结构。在宏观性能上,橡胶沥青在-24~100℃的宽温域范围内表现出了优异的综合性能:高温抗车辙能力最强,低温抗裂性能最优,抗疲劳性能介于70号道路石油沥青与SBS改性沥青之间。这些特性使其特别适用于重载交通和高温工况条件下的道路建设,为实现废旧轮胎资源化利用与提升沥青路面性能提供了可靠的技术方案。
With the rapid development of China's transportation industry,the waste tires has rapidly surged that caused the increasingly severe problem of"black pollution".Under this context,the waste tires are processed into rubber powder and applied to asphalt modification,which can not only achieve resource recycling but also improve the performance of asphalt pavement.In order to further explain its modification mechanism and road performance,and provide technical support for the improvement of China's waste tire resource utilization industry chain and the construction of green transportation infrastructure,rubber asphalt is taken as the research object,and the petroleum asphalt and SBS modified asphalt of Road 70 are taken as references.By combining microscopic characterization with macroscopic performance testing,the elemental composition,molecular mechanism,thermal stability,rheological properties and fatigue characteristics of rubber asphalt were systematically investigated over a wide temperature range(−24~100 C).The research results indicate that rubber asphalt has a higher proportion of S,N,O and other elements,which are physically blended with a 3D network structure than petroleum asphalt and SBS modified asphalt on Road 70.In terms of macroscopic performance,rubber asphalt exhibits excellent comprehensive performance in a wide temperature range of 24 to 100 C:the high-temperature anti rutting ability is the strongest,the low-temperature anti cracking performance is the best,and the anti fatigue performance is between Road 70 petroleum asphalt and SBS modified asphalt.These characteristics make it particularly suitable for road construction under heavy traffic and high temperature conditions,providing a reliable technical solution for the resource utilization of waste tires and improving the performance of asphalt pavement.
作者
狄海波
陈代磊
熊保林
周林
阳恩慧
邱延峻
DI Haibo;CHEN Dailei;XIONG Baolin;ZHOU Lin;YANG Enhui;QIU Yanjun(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;Sichuan Tibetan Autonomous Region Expressway Co.,Ltd.,Chengdu 610041,China;Key Laboratory of Road of Sichuan Province,School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;Guangxi Jiaotong Science and Technology Co.,Ltd.,Nanning 530007,China)
出处
《市政技术》
2026年第1期221-230,共10页
Journal of Municipal Technology
基金
国家自然科学基金项目(52278460)
四川省自然科学基金项目(2024NSFSC0016)。
关键词
橡胶沥青
宽温域技术
改性机理
性能评价
rubber asphalt
wide temperature range technology
modification mechanism
performance evaluation
