镍粉/碳纤维复合导电沥青胶浆的电热性能  

Electrothermal Properties of Nickel Powder/Carbon Fiber Composite Conductive Asphalt

作　　者：汤智杰 王路生 杨景玉 TANG Zhijie;WANG Lusheng;YANG Jingyu(School of Traffic and Transportation Engineering,Changsha University of Science and Technology,Changsha 410114,China;School of Highway,Chang’an University,Xi’an 710064,China)

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410114 [2]长安大学公路学院,陕西西安710064

出　　处：《材料科学与工程学报》2024年第2期290-298,共9页Journal of Materials Science and Engineering

摘　　要：基于电阻率、升温速率、车辙因子和劲度模量等指标优选出镍粉/碳纤维复合导电沥青胶浆Ni-CF-2,研究了其电性能和热性能,并根据其内导电材料微观分布研究其导电机理。结果表明,Ni-CF-2在交流电下的电流值显著大于直流电,但非线性伏安特性离散性较大,且同时存在温敏效应和压敏效应;10 mm厚Ni-CF-2的导热系数比基质沥青高18.8%,通电时热量呈现层状的均匀分布,20 min内升温幅度达50℃以上,并具有良好切缝愈合能力;Ni-CF-2试样由导电颗粒的接触或电子跃迁形成导电通路。Nickel powder/carbon fiber composite conductive asphalt(Ni-CF-2)was selected based on resistivity,heating rate and rutting factor and stiffness modulus,and its electrothermal properties were studied.The conductive mechanism was explored according to the micro distribution of conductive materials in Ni-CF-2.Results show that the average current value of Ni-CF-2 under alternating current(AC)is higher than that under direct current(DC),but the nonlinear volt ampere characteristics are discrete,and there are temperature-sensitive effect and pressure-sensitive effect.The thermal conductivity of Ni-CF-2 with 10 mm thickness is 18.8%higher than that of matrix asphalt.When powered on,the heat of Ni-CF-2 is evenly distributed in layers.The temperature rise range exceeds 50℃within 20 min,and it has good crack healing ability.The Ni-CF-2 samples can form conductive paths by contact or electron migration of conductive materials.

关 键 词：镍粉 碳纤维 导电沥青胶浆 伏安特性 导热系数 

分 类 号：U414[交通运输工程—道路与铁道工程]