摘要
针对沥青路面因车辆荷载、温度荷载等带来的裂缝扩展问题,采用碳纳米管-碳纤维制备导电沥青混合料,进行电-热愈合试验,分析沥青混合料裂缝愈合前后的电阻率值、断裂能、极限承载力和微观结构,研究导电作用下碳纳米管-碳纤维沥青混合料的自愈合水平。结果表明,碳纳米管掺量在0.5%,1.0%时可以显著提高沥青混合料的自愈合能力;导电沥青混合料的自愈合水平与愈合前、后电阻率比值存在Sine函数关系;在50℃、20 min环境下小梁试件的极限承载力和断裂应变能得到最大限度的恢复。
To address the issue of crack propagation problem caused by vehicle loading,temperature loading,etc.of asphalt pavement,the electrically conductive asphalt mixtures was prepared with carbon nanotubes-carbon fibers.The resistivity values,fracture energy,ultimate load bearing capacity and microstructure of asphalt mixtures before and after the healing of cracks were analyzed,and the self-healing level of the carbon nanotubes-carbon fiber asphalt mixtures under conductive action was studied.The results show that carbon nanotubes can significantly improve the self-healing ability of asphalt mixtures at 0.5% and 1.0% of carbon nanotube content.The self-healing level of conductive asphalt mixtures has a Sine function relationship with the resistivity ratio before and after the healing process.The ultimate load carrying capacity and fracture strain of the trabecular specimens can be maximally recovered at 50℃ for 20 min.
作者
栾利强
任俊颖
余和德
文双寿
江永盛
LUAN Liqiang;REN Junying;YU Hede;WEN Shuangshou;JIANG Yongsheng(School of Civil Engineering and Architectural Engineering,Guilin University of Technology,Guilin 541004,China;Guangxi Key Laboratory of Rock and Soil Mechanics and Engineering,Guilin 541004,China;Guangdong Hualu Transportation Technology Co.,Ltd.,Guangzhou 510000,China)
出处
《功能材料》
CAS
CSCD
北大核心
2024年第1期1151-1157,共7页
Journal of Functional Materials
基金
国家自然科学基金(51369010)
广西科技计划项目(桂科AD-19110085)。
关键词
沥青路面
导电沥青混合料
碳纳米管-碳纤维
电-热
自愈合
asphalt pavement
conductive asphalt
carbon nanotubes-carbon fibers
electricity-heat
self healing
