臺灣博碩士論文加值系統

氯離子誘發鋼筋發生腐蝕生銹，導致R.C.結構物損壞崩塌，是一般公認的事實。鋼筋的腐蝕是評估結構物耐久性及使(適)用性之重要指標之一。因此，減少或去除混凝土內之氯離子，是降低或防止鋼筋繼續發生腐蝕生銹的可行方式。文獻顯示，電化學去鹽處理對遭受氯鹽侵襲結構物之腐蝕改善及防治效應有正面的評價。研究中特從多方面進行探討，分別為影響電化學去鹽效果之因素、外加電力(能)場作用後對混凝土漿體性質之變化、鋼筋腐蝕狀態的改善以及由外界輸入鋼筋腐蝕抑制劑至混凝土內鋼筋表面之可行性。
試驗結果顯示，電化學處理過程為一簡單、有效且可行之除鹽方法，在短時間內可大量去除氯離子，對於鋼筋的腐蝕狀態可大幅改善，其混凝土性質諸如孔隙溶液之組成、化性、分佈及漿體孔隙率等均有一定程度之變化。同時，由外在強制輸入鋼筋腐蝕抑制劑至混凝土內鋼筋表面，以達到抑制鋼筋腐蝕之作用是可行的，但是，在通電期間曾短暫發生鋼筋腐蝕、銹水外滲之現象，試體表面有微裂縫產生，因此，在處理技術上應做適當的改善。整體而言，電化學去鹽處理對R.C.結構物耐久性之提升有一定程度的效果。

Chloride-induced corrosion of steel reinforced concrete structures is generally acknowledged. In some aspects, rebar corrosion rate could be considered as one of the major indexes in assessing its durability and serviceability of reinforced concrete. Therefore, reducing and eliminating chlorides in concrete should be a feasible way to prevent the rebar from further corrosion. Recent studies indicated that removing of chloride by means of electric migration force appears to be the newest, simplest and a very promising rehabilitation technique for improving and preventing the corrosion of reinforcement in chloride ingress concrete. In the study, three topics were investigated. They are included influence factors that affected the efficiency of chloride removal, concrete properties variation, and rebar corrosion resistance improvements. The results showed that chloride removal efficiencies increased with increasing applied current density and their treatment time, rebars corrosion were prevented and durability elevated.

封面
摘要
Abstract
目錄
圖目錄
表目錄
第一章 緒論
1-1 研究背景與動機
1-2 研究目的
1-3 研究範圍及內容
1-4 論文架構
第二章 文獻回顧
2-1 金屬之腐蝕
2-2 鋼筋混凝土腐蝕之行為
2-3 鋼筋混凝土結構劣化之原因
2-4 鋼筋混凝土結構物損壞之模式
2-5 評估R.C.結構物腐蝕損壞之方法
2-6 電化學技術應用於R.C.結構物之修護與腐蝕防治
2-7 電化學技術處理後對混凝土品質之影響
2-8 鋼筋腐蝕抑制劑之應用
第三章 試驗規劃與研究方法
3-1 試驗目的
3-2 研究規劃
3-3 試驗材料
3-4 配比與試體製作
3-5 試驗裝置
3-6 試驗參數與組合
3-7 研究方法
3-8 試驗步驟
3-9 主要試驗儀器
第四章 去鹽成效之試驗分析
4-1 影響去鹽效率之因素
4-2 通電時間
4-3 電流密度
4-4 電荷移動路徑(電化學作用區域)
4-5 電通量
4-6 鋼筋分佈(數量、排列)
第五章 混凝土基本性質之變化分析
5-1 混凝土表面之滲出物
5-2 孔隙溶液變化
5-3 混凝土孔隙變化
5-4 X-光線繞射分析
5-5 混凝土電阻係數之變化
5-6 其它非破壞性檢測之分析
第六章 陽極槽電解質溶液之變化分析
6-1 陰離子濃度變化
6-2 陽離子濃度變化
6-3 電解質溶液之pH值變化
6-4 電化學去鹽系統供應電壓之穩定性
第七章 鋼筋腐蝕狀態之分析
7-1 鋼筋腐蝕電位值之變化
7-2 電化學交流阻抗頻譜分析
7-3 鋼筋腐蝕電流(密度)之變化
第八章
8-1 滲入深度
8-2 試體內陰離子濃度分佈
8-3 試體內陰陽離子濃度分佈
8-4 腐蝕抑制劑對鋼筋腐蝕狀態之影響
8-5 電化學去鹽系統供應電壓之穩定性
第九章 結論與建議
9-1 結論
9-2 建議
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