Kazuhiro IKEDU
Microscopic Mechanism of Shielding Effect of Surface Coating Material and Impregnating Material against Chloride Ion
SuperviserFTakumi SHIMOMURA
Nowadays, surface coating and impregnating materials are sometimes applied to concrete structure to enhance its durability. In this study, the shielding effect of these materials against chloride ion is focused on.
To know the Shielding performance of concrete material, on that, surface coating or impregnating material is applied, permeability of chloride ion is examined by electric erosion test. Both ionic mobility and electrical conductivity is strongly associated with micro-pore structure of concrete material. Besides, past researcher explained that ionic mobility is expressed by electrical flux. As a result, it's clarified that chloride diffusion coefficient of surface coating material and impregnating material can be evaluated from electrical conductivity by utilizing numerical simulation in the condition of assumed thickness. Microscopic mechanism of improvement effect of surface impregnating material on shielding performance against chloride ion is clarified from the test data of pore size distribution and the result of numerical simulation.