熔射鋼筋混凝土之腐蝕行為與握裹強度之研究

Investigation of the Bonding Strength for Corrosion Surface Fusing Reinforced Concrete

由於台灣地理環境之特殊因素，鋼筋銹蝕的問題屢見不鮮，因此，如何增加鋼筋混凝土結構物之防蝕及耐久性便成為一重要的課題。有鑑於此，本研究探討熔射鋼筋對混凝土握裹強度之影響，並透過加速腐蝕的方法，探討熔射鋼筋經過加速腐蝕試驗後，其握裹力之變化情況。應用鋼筋腐蝕檢測儀，量測鋼筋加速腐蝕前後，腐蝕電位的變化對握裹力的影響。經由拉拔試驗，比對鋼筋腐蝕與無腐蝕試體之握裹力變化之機理。期望能結合電化學檢測技術與握裹強度拉拔試驗對熔射鋼筋之握裹效能作更進一步的了解，然後評估熔射鋼筋混凝土之握裹效能，以作為日後工程設計應用之參考。

Due to the environmental factors in Taiwan, the loss of bond strength of reinforced concrete resulting from corrosion has become the important indicator of evaluate the residual life of construction. The current study investigate the bonding strength for several different surface fusing rebars under corrosion state. Furthermore, this study conduct an empirical formula and comparison between the bonding strength measured by the standard pull-out specimen. This study expects that for the damage of reinforced concrete caused by corrosion, it could interpretate the relationship between electrochemical measurement and bonding strength for corrosion fusing rebars.