해양골재로 제작한 철근 콘크리트의 부식특성

Corrosion Characteristics of Reinforcement Concrete made by Marine Aggregate

In these days, mostof marine structures are constructed by reinforcement concrete due to economic reason. Theoretically, it is widely recognized that rebar in sound concrete is safe against corrosion because of the high alkalinity of concrete. However, corrosion for reinforcement concrete made by marine aggregate and exposed to ocean enviroments has become serious social problem. Especially in Korea, with the rapid economic growth construction activities have been accelerated and needed more natural aggregate. Therefore, inevitably marine aggregate had to be used due to limitation of good quality aggregate. In this study, as a part of efforts to establish the fundamental counterplan on corrosion problems related to marine aggregate, concrete specimens with chloride containing material and inhibitor have been studied. And, in order to analyze corrosion characteristics several electrochemical techniques including half-cell potential survery, linear and cyclic polarization tests were carried out.