Influence of aggregate content on the percolated interfacial transition zone of cement-based materials by using accelerated chloride migration test

In this study, the effect of the aggregate content on the chloride migration coefficient at the percolated interfacial transition zone (ITZ) was studied in cement-based materials. Specimens with three different water-to-cement ratios and five different aggregate volume fractions were used. The chloride migration coefficient was measured with the accelerated chloride migration test (ACMT). A three-phase composite model was used to determine the approximate chloride migration coefficient at the percolated ITZ. The results showed that the approximate chloride migration coefficient at the percolated ITZ increased significantly as more rod-shaped aggregate was used in the mortar.