Electrothermal Properties of Nickel Powder/Carbon Fiber Composite Conductive Asphalt
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.
国家科技期刊平台
NSTL
万方数据
维普
