抄録
The chloride permeability of the concrete has to be evaluated it adequately to carry out the effective maintenance repair plan of the concrete structure for damage by salt attack. Because the existence of the crack lets chloride permeability of the concrete accelerate more, it must be evaluated adequately in particular. However, the calculation is difficult by the existing evaluation method with the complicated crack cases. In this study, the crack cases of the subject is much irregularity crack and a little short crack in a wide area like the floor slab in such crack cases. This study tried that it was made clear by the electrical migration test method. The test method was carried out by mortar which changed some cases such as crack width, crack depth, crack length and crack number to clarify the chloride permeability of the concrete and the influence of the difference of those cases on effective diffusion coefficient was examined experimentally. Furthermore, the possibility of the consideration of the crack cases for the calculation method of the chloride ion content of reinforcement position was examined based on the experiment results.
