The reinforce concrete structure is complex of the concrete and the steel , and the steel frame reinforces the concrete which omits in the tensile, and each other is a structural body which supplements the fault of facing each other as a concrete protects a steel which easily being corroded from the durability side.
But, the passivity layer of the steel is destroyed by decrease of pH in compliance with the acid rain or carbon dioxide, calcium chloride used snow removal in winter or inflow of salinity. And then, it operates with a primary factor which promotes the corrosive action. The corrosion product made by corrosive action like this expands about 2.5times comparing with volume of the steel and occurred a crack in the structure. Resultantly, brings about the decrease of structural performance and internal troubles efficiency of the concrete structure.
Rebar is corroded in atmosphere because external environment. Tensile force decrease of corroded rebar not find in currently portable measuring instrument.
Therefore in this study rebar is corroded by Iron(II) chloride, rebar corrosion influence by Iron(II) chloride is investigated and rebar tensile force decrease ratio according to rebar corrosion ratio will find.