Non-Steady-State Chloride Migration Test on Mortar with Supplementary Cementitious Materials

The non-steady-state migration test for measuring the chloride migration coefficient was performed on mortar specimens fabricated with supplementary cementitious materials. A careful examination of the test results revealed that the use of more than one specimen with different test durations is recommended for obtaining reliable chloride migration coefficients. Additionally, the voltage applied to the specimens should be set at values that prevent a substantial increase in electrical current and solution temperature during the test. The chloride migration coefficients derived from the non-steady-state migration test were subsequently compared with the chloride diffusion coefficients obtained from the immersion test. Although there were discrepancies between the values of these two coefficients, both test results indicated that the mixing of supplementary cementitious materials contributed to the improved resistance of mortar to chloride ingress.