Preparation of steel fiber/graphite conductive concrete for grounding in substation

In high soil resistivity regions, values of grounding resistance of substations are usually difficult to meet the requirements of working earthing and safety earthing. The common methods for reducing the grounding resistance are not practical. In order to solve this problem, a steel fiber/graphite conductive concrete is developed in this paper. Steel fiber and graphite are added as conductive fillers. Orthogonal experimental design is applied to formulation optimization. The resistivity, compressive strength and flexural strength of steel fiber/graphite conductive concrete are measured for obtaining the optimal formula. The results demonstrate that the steel fiber/graphite conductive concrete not only has the advantage of small resistivity, but also has excellent mechanical property and good material dispersion effect.