摘要
Abstract
To enhance the crack resistance of asphalt mixtures,this paper prepared carbon nanotube/carbon fiber composite modified conductive asphalt mixtures,determined the optimal carbon nanotube content,and deeply analyzed the conductive performance and self-healing performance of carbon nanotube conductive modified asphalt mixtures.The results showed that as the content of carbon nanotubes increased,the resistance value of the conductive asphalt mixture decreased first and then increased,while the electrical conductivity was the opposite.The optimal content of carbon nanotubes was 0.75％.With the extension of the charging time and the increase of the heating temperature,the healing level of the conductive asphalt mixture continuously decreased.Through practice,it was known that after the construction,the detection indicators such as the smoothness and compaction degree of the asphalt pavement all met the specification requirements;two years after the construction,no significant damage was found on the pavement,only a small number of micro-cracks were produced at the curb.This indicates that the carbon fiber conductive asphalt mixture has a good application effect.关键词
道路工程/沥青混合料/碳纳米管-碳纤维/自愈合特性/愈合机理Key words
Road engineering/Asphalt mixture/Carbon nanotubes-carbon fibers/Self-healing property/Healing mechanism分类
交通工程
