Comparison of Chloride Binding Capacity of Binary and Ternary Binders

Reinforced concrete structures work in the marine environment are easily erroded by the environment, the most dangerous intrusion by chloride ions. Chloride ions from the environment penetrate into concrete layer and cause reinforcement corrosion. The high chloride binding capacity in concrete helps reducing the reinforcement corrosion. The chloride binding capacity in concrete is largely dependent on the cement type. This paper investigated the chloride binding capacity of various binary and ternary binders. Chloride contents in mortars prepared with various binary and tinery binders were determined by chemical titration methods combining with microstructure analysis SEM. The experimental results showed that the chloride binding capacity of tinery binders which contains Ordinary Portland cement (OPC), blast furnace slag mixed with silica fume is highest.