Self-healing study of carbon nanotube-carbon fiber asphalt mixture under conductive action
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-car-bon 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 nano-tubes-carbon fiber asphalt mixtures under conductive action was studied.The results show that carbon nano-tubes 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 trabecu-lar specimens can be maximally recovered at 50 ℃ for 20 min.
万方数据
维普
