Research on conductive mechanism of carbon fiber reinforced cement

The electrical behavior between carbon and cement was studied by single fiber pull-out testing in this paper. The contact electrical resistance increased as the interfacial bonding force increasing and had good electromechanical reversibility. The variation of the interfacial shear stress causes the change of interfacial structure and results in the change of the conductive network of the composites. The irreversibly increasing resistance during the loading is attributed to interface debonding between fiber and matrix and the reversibly increasing resistance is attributed to elastic deformation of interfacial structure. The reversible deformation of the interfacial structure causes a reversible increase in the electrical contact resistance.