The relationship between migration time in ACMT and ponding time in ponding test for cementitious materials

Abstract

The objective of this study is to investigate the relationship between the diffusion behaviors of chloride ions and the migration of chloride ions in the cementitious materials. Different kinds of mortars with different binder combination (fly ash, slag and fly ash plus slag) and w/b ratios (w/b = 0.35, 0.45, 0.55, and 0.65) were used. In this study, the diffusion test and the migration test were carried out with the ponding test (AASHTO T259) and the accelerated chloride migration test(ACMT), respectively. The chloride profiles were obtained under different ponding time with ponding test and different migration time with ACMT. The penetration depth of chloride ions was obtained from the chloride profile. The testing time relation between ponding and ACMT was determined, when they were the same penetration depth. The experimental result shows a good linear relationship between the ponding time from ponding test and migration time from ACMT.