Abstract:
To improve the cracking resistance of conductive Textile Reinforced Concrete (TRC) under chloride salt corrosion and impressed current. In this paper, a conductive fine-grained concrete by compounding carbon fibers and graphite was firstly proposed by the four-electrode method, and the effects of fine-grained concrete thickness, textile layers, and embedded CFRP bars on the flexural performance of conductive TRC under chloride salt corrosion and impressed current were investigated by four-point bending test. It is shown that the electrical resistivity of fine-grained concrete gradually increased with increasing age of curing. The dual incorporation of carbon fiber and graphite can effectively reduce the resistivity of fine-grained concrete, and the resistivity of fine-grained concrete decreases gradually with the increase of carbon fiber and graphite mixing. Increasing the thickness of fine-grained concrete has a relatively small effect on the flexural performance of TRC. While increasing the number of layers of textile and embedded CFRP bars can effectively improve the crack distribution characteristics of TRC and improve the crack resistance and bending resistance of conductive TRC. Based on basic assumptions, combined with experimental data and cross-sectional stress analysis diagrams, a calculation model for TRC four point bending bearing capacity under chloride salt corrosion and impressed current is established.