An Experimental Study on Bond Strength of Corroded Bars Before and After Placement

콘크리트 타설 전과 후에 부식된 이형철근의 부착강도에 대한 실험적 연구

Recently, use of sea-sand as fine aggregates in reinforced concrete structures is increasing because of lacking of supply due to destructive of environment caused by obtaining and exhausting of resource. It rise up issue, some field reconstruction, interrupted construction works occurring to the trouble on the site because sometimes engineer does not agree to use of corroded bar, even slighly corroded. This study investigates the properties of bond strength and the structural behavior of corroded bars before and after placement. The purpose of the study is to present the database estimating degree of damaged bond strength according to corrosion level and deciding on whether using corroded bars or not.