Chloride attack III / Corrosion & Corrosion prevention I

[1149] EFFECT OF CORROSION-INDUCED CRACK AND CORRODED REBAR PROFILE ON BOND STRESS AND SLIP RELATIONSHIP

Yizhou YANG¹, Hikaru NAKAMURA², Taito MIURA², Yoshihito YAMAMOTO² (1.Nagoya University 2.名古屋大学)

Keywords:bond-slip relationship, corroded rebar profile, corrosion crack, rebar corrosion, two ends pull-out test, 両引き試験, 付着-すべり関係, 腐食ひび割れ, 腐食鉄筋形状, 鉄筋腐食

This paper investigated individual effect of corrosion-induced crack and corroded rebar profile on bond behavior. Test specimens were corroded by an accelerated electric corrosion method and bond-slip relationship was measured by two ends pull-out test. Under various corrosion degrees, the influence of corrosion crack, shape of corroded rebar and rust around rebar on bond behavior were discussed separately. Moreover, corroded rebar profile was measured by laser meter and correlation between corrosion degree and geometry change was demonstrated. Corrosion crack in concrete was clarified to be more dominant factor than corrosion profile in bond deterioration mechanism.