Abstract
In this study, mass transport models in multi-scale thermodynamic analytical system were enhanced focused on the nano-meter-scale phenomena with the purpose of reproducing high resistivity against chloride attack with the low W/C concrete materials and studying its causes. Based on the results of sensitivity analyses and past researches, modified water amount considering the threshold radius about chloride ion movement was introduced in the chloride ion transport model, and also friction force between pore wall and pore water was installed to the water permeability coefficient in the liquid water transport model. Proposed model was verified with the results of salt water immersion tests and the analytical results showed that enhanced models reproduced the high resistivity against the chloride ion penetration in the low water-to-cement ratio materials properly.
