沥青路面材料导电性能的实验研究.docVIP

沥青路面材料导电性能的实验研究 摘 要 本文实验研究了不同掺量的导电石墨和不同细度的天然鳞片石墨对导电沥青混凝土的导电性能的影响，结果表明：随着石墨掺量的增加，电阻率不断减小，石墨掺量为40%时导电性能最好，电阻率趋于稳定；随着天然鳞片石墨细度的增加导电沥青混凝土的导电性能是降低的。同时还研究了在不同温度，不同湿度下导电沥青混凝土的电导率的变化：在不同温度下，当掺量较小时主要表现为PTC效应；当掺量较大时还要受粒子的热扰动性影响，温度与导电性呈非线性关系。选取合适的掺量对导电沥青混合料的电阻稳定性有较大的帮助；在不同湿度下，湿度对电阻率的影响不是很明显，对电阻率的升高影响不大。 关键词：导电沥青混凝土，石墨，电学性能，电阻率 Asphalt pavement materials conductive performance study ABSTRACT In this paper,we mainly analysis the conductivity of conductive asphalt oncrete,the different dosage of conductive graphite and different fineness of natural flake graphite effect on conductivity of conductive asphalt concrete are expounded.through the experiment ,Graphite production 40% conductive performance is best;conductivity decreases continuously,after reach a certain content,conductivity tends to be stable.At the same time with the increase of fineness of natural flake graphite conductive performance of conductive asphalt concrete is lower. Finally, this article also studied at different temperature, the change of the conductivity of conductive asphalt concrete under different humidity. Experimental results show that under different temperature, when the dosage is small mainly for PTC effect; When the dosage is bigger was mainly affected by particle thermal disturbance of sex, temperature and electrical conductivity is nonlinear relationship. Select the appropriate dosage of conductive resistance stability of the asphalt mixture has a great help. Under different humidity, humidity influence on resistivity is not very obvious, the resistivity increases. Keywords: Electrically conductive asphalt concrete; Graphite; Electrical properties; Resistivity 目 录 1 绪论 1 1.1 研究的背景和意义 1 1.2 导电沥青混凝土的研究与应用现状 4 1.3本文的主要研究内容 5 2 文献综述 6 2.1 导电沥青混凝土的导电介质分类 6 2.2 导电机理 7 2.2.1复合导电材料的导电机理 7 2.2.2石墨导电沥青混凝土的导电机理 10 2.2.3 导电沥青混凝土的导电模型 12 2.2.4 沥青用量对导电性能的影响 13 2.2.5 石墨用量对导电性能的影响 14 2.2.6压实度对导电性能的影响 14 2.3 温敏特性概述 14 3 实验部分 16 3.1主要仪器与设备 16 3.2制备