纳米石墨烯改性沥青路用性能研究
Study on Road Performance of Nano Graphene Modified Asphalt
汤雄 1刘丽 1孙晟凯 1刘顺英1
作者信息
- 1. 四川省交通建设集团有限责任公司,成都 610041;四川省交通运输绿色现代路面工程技术研究中心,成都 610041
- 折叠
摘要
为研究纳米石墨烯对沥青路用性能及改性机理的影响,通过压力老化试验(PAV)、旋转薄膜试验(RTFOT)、动态剪切流变试验(DSR)及扫描电镜测试仪等手段对纳米石墨烯改性沥青的高温性能、低温性能、抗疲劳性能、抗老化性能及黏弹特性进行深入研究.其次,对纳米石墨烯改性沥青的化学组成及结构进行表征与分析,从微观角度对纳米石墨烯的改性机理进行分析.研究表明:随着纳米石墨烯的加入,纳米石墨烯能够与热沥青发生较强的亲和物理作用,能够改善改性沥青与SBS的相容性,有效地对热沥青分子链段产生插层和缠绕,提升改性沥青高温性能、低温性能及抗老化性能.
Abstract
In order to study the effects of nanographene on the performance and modification mechanism of asphalt road,the high-temperature,low-temperature,fatigue resistance,anti-aging properties and vis-coelastic properties of nanographene-modified asphalt were studied by means of pressure aging test(PAV),spinning thin film test(RTFOT),dynamic shear rheology test(DSR)and scanning electron microscope test-er.Secondly,the chemical composition and structure of nanographene-modified asphalt were characterized and analyzed,and the modification mechanism of nanographene was analyzed from a microscopic perspective.The results show that with the addition of nanographene,nanographene can have a strong affinity with hot as-phalt,which can improve the compatibility between modified asphalt and SBS,effectively interlayer and en-tangle the molecular segments of hot asphalt,and improve the high-temperature,low-temperature perform-ance and anti-aging performance of modified asphalt.
关键词
纳米石墨烯/高温性能/低温性能/抗疲劳性能/抗老化性能/改性机理Key words
nano graphene/high temperature performance/low temperature performance/fatigue resist-ance/anti-aging performance/modification mechanism引用本文复制引用
基金项目
四川省交通建设集团有限责任公司科技项目(STCJ-2022-102)
出版年
2024
NETL
NSTL
万方数据