Chloride binding capacity in cementitious materials is a crucial factor for service life prediction of marine concrete. C-S-H phase have significant physical binding capacity for chloride ions. In this study, specific surface area of C-S-H with various Ca/Si ratio was measured. This study suggested effective way to compute maximum adsorption of bound chloride by C-S-H based on theory single molecular layer. In addition, surface potential is very important as a main mechanism for chloride binding adsorption. Thus, intrinsic equilibrium constant was obtained and surface potential of C-S-H was calculated in chemical equilibrium solution by means of PHREEQC. Based on the experiment results, to develop integrated system for prediction of chloride binding behaviors is final goals.

• 윤인석(인덕대학교 건설정보과 교수) | Yoon, In-Seok