碳纤维水泥基复合材料（CFRC）Peltier效应能显著降低冬季路面热融除雪能耗，但解耦提高其电导率并稳定Seebeck系数是应用前提，确切的强化机理和方法尚未明确。CFRC具有的高密度微观结构缺陷（本质为多类型界面组合）使其电导率行为规律和电导率-Seebeck系数耦合规律与晶态热电材料显著不同，水泥基材料电导率解耦强化的相关理论，迄今国内外也尚无报道。本课题前期研究发现，增加碳纤维或金属氧化物与基体界面的界面密度，可显著提高CFRC电导率并稳定Seebeck系数。在此基础上，本课题将通过缺陷界面对载流子输运过程的影响研究，阐明高密度缺陷界面对CFRC电导率强烈影响的微观机制，然后在缺陷界面构造二维电子气异质界面，研究电子气对高密度缺陷界面载流子输运过程迁移率的影响规律，阐明CFRC电导率的高密度缺陷界面电子气解耦强化机理，获得电导率解耦强化的工艺方法，为降低路面热融除雪能耗提供新途径。

Energy consumption of pavement resistance heating for deicing and snow removal in winter can be reduced greatly by Peltier effect of carbon fiber reinforced cement-based composites (CFRC). However, decoupled electric conductivity of CFRC has to be increased before realizing this application. Up to the present, the enhanced mechanism and method are not clear. The behavior of CFRC electric conductivity and the coupling behavior between CFRC electric conductivity and Seebeck coefficient are greatly different from the crystalline thermoelectric materials, because of the extreme density microstructure defects in CFRC which consist of polytype defect interfaces. In addition, the decoupled enhanced theory for electric conductivity of relative cement-based materials has not been reported until now. In our previous research, the electric conductivity of CFRC was increased and decoupled with holding Seebeck coefficient at a high value, by increasing the content of interface between metallic oxide or carbon fiber and cement matrix. Take into account these results, the effect of defect interfaces in CFRC on carrier transport will be first researched to explain the strong effect mechanism of high density defect interfaces on CFRC electric conductivity. After the two-dimensional electron gas is introduced into the defect interfaces, the effect of electron gas on carrier mobility along the network of high density defect interfaces in CFRC will be also researched. Then, the decoupled enhanced mechanism of CFRC electric conductivity via cooperative action of high density defect interfaces and two-dimensional electron gas can be made clear. Finally, the decoupled enhanced method of CFRC electric conductivity by material technology and the estimation of energy consumption for pavement deicing and snow removal by CFRC-Peltier effect will be obtained. In this work, the electric conductivity enhanced mechanism of cement-based materials will be explained from a new perspective, and a new approach reducing energy consumption of pavement resistance heating for deicing and snow removal will be provided.