Carbon fiber powder (CFP) was first applied to conductive asphalt concrete as a conductive phase material, but its action mechanism has not been clarified. In this paper, atomic force microscopy (AFM) and molecular dynamics (MDs) simulation are used to study the carbon fiber powder mechanism of action, guide the preparation of conductive asphalt concrete, and study the electrothermal properties of conductive asphalt concrete. The results show that carbon fiber powder weakens the adhesion property of asphalt mastic, and this weakening further strengthens in the water–temperature coupling, so water stability and conductivity are used as evaluation indicators to determine that the optimal content of carbon fiber powder is 2.0% and that the optimal content of carbon fibers (CFs) is 0.4%. Carbon fiber–carbon fiber powder conductive asphalt concrete with a resistivity of 0.98 Ω·m was finally prepared. In the temperature rise test of the Marshall specimen and rutting slab, its warming effect is obvious, and the heat transformation rate is more than 75%, so it has a very good ability to melt snow and ice.

中文翻译：

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基于导电相材料作用机理的导电沥青混凝土制备

碳纤维粉（CFP）首先作为导电相材料应用于导电沥青混凝土，但其作用机理尚未阐明。本文利用原子力显微镜（AFM）和分子动力学（MDs）模拟研究碳纤维粉末的作用机理，指导导电沥青混凝土的制备，并研究导电沥青混凝土的电热性能。结果表明，碳纤维粉削弱了沥青玛蹄脂的粘结性能，且这种减弱作用在水温耦合作用下进一步加强，因此以水稳定性和电导率作为评价指标，确定碳纤维粉的最佳掺量为2.0%碳纤维(CFs)的最佳含量为0.4%。最终制备出电阻率为0.98Ω·m的碳纤维-碳纤维粉导电沥青混凝土。在马歇尔试件和车辙板的温升试验中，其升温效果明显，热转化率达到75%以上，因此具有非常好的融冰雪能力。