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.
维普
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