Study on the conductive properties of carbon fiber-graphite on fine-grained concrete in TRC

In order to cost-effectively reduce the resistivity of fine-grained concrete in TRC. In this paper, the effect of two different conductive phase materials, carbon fiber and graphite, on the mechanical and conductive properties of fine-grained concrete was investigated by incorporating different conductive phase materials to modify fine-grained concrete in TRC. The research shows that compared with graphite, the fluidity of carbon fiber for fine-grained concrete decreases significantly. When two conductive phase materials were incorporated into the fine-grained concrete, the compressive strength was reduced to varying degrees. For the fine-grained concrete specimens mixed with different conductive phase materials, the resistivity of the specimens increases with the age, and the resistivity of the specimens gradually decreases with the increase of the content of the two conductive phase materials. Finally, the conductive paths in the fine-grained concrete with double-doped conductive phase materials are divided into a triple conductive path, and the resistivity calculation model of fine-grained concrete after doping with conductive phase materials is established based on the Ezquerra model.