This invention relates to the civil engineering materials field, which is a method of testing volume resistivity of conductive cement-based materials. The method tests sample voltammetric with four electrodes based on principle of resistance first, and calculate the resistivity values of the sample based on the formula. With the following steps: 1) select the cement-based material samples, and take the pretreatments; 2) take two ends of the testing sample as current access electrode, and two middle parallel surfaces of the sample as voltage test electrodes, and link current into the test; 3) measure resistance based on Principle V and calculate the corresponding resistivity value. The invention takes the entire face of the sample as current access electrode; and central surface electrode as voltage test electrode. Save the tedious process of ordinary electrode testing method embedding electrodes and dispel the one-sidedness of ordinary electrode voltage testing. Test the voltage drop of the sample voltage electrode more accurately. |