Evaluation of Sait Damage Environment of Gunkanjima Concrete Structures

It is necessary to evaluate the chloride attack environment for durability design and maintenance of the structure under marine environment. The amount of salt penetration into the concrete structure is influenced by weather conditions and neighboring topography. Chloride attack environment also depends on the shape and the dimension of structures. However, these effects have not been clarified. Although many researches about chloride attack caused by airborne salt had been conducted in past time, most of those were related to macro environment. Under such circumstances, the exposure test using thin plate mortar specimens was conducted on the Gunkanjima concrete structures. As a result, it is confirmed that amount of airborne salt penetration into the structure is influenced by neighboring topography and weather conditions, and it can be evaluated that the deterioration condition of each sp structures by short term exposure test using the thin plate mortar specimens. By the thin mortar exposure test, micro chloride attack environment can be evaluated