English：

To solve the problems of damage and the long cycle of traditional concrete performanceevaluation methods, this paper focuses on the key electrical characteristics of concrete resistivity andsystematically studies its test methods and influencing factors. The superiority of the Wenner probemethod was verified by comparing the test accuracy and applicability of the two⁃point uniaxial method,the Wenner probe method (four⁃point method), and the outer electrode method. The L9(33) orthogonaltest was used to explore the influence of water⁃binder ratio, curing age, and aggregate gradation onresistivity, and a multiple linear regression prediction model was established. The results indicate that thecoefficient of variation of the Wenner probe method is only 3. 5%, and the test accuracy is the highest,which can take into account both laboratory and on⁃site non⁃destructive testing. The order of significanceof the factors affecting the resistivity of concrete is water⁃binder ratio > curing age > aggregate gradation.For every 0. 1 increase in water⁃binder ratio, the resistivity decreases by 16% ~ 18%, and the resistivitydecreases by 22. 0% when the curing age is extended from 7 days to 90 days. The established regressionmodel has a high degree of fitting, and the relative error of prediction is less than 4%.