导电作用下碳纳米管-碳纤维沥青混合料的自愈合研究.

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 ().5% and 1.()% 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 5() °C for 20 min. [ABSTRACT FROM AUTHOR]