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研究生:莊信一
論文名稱:Kramers-Kronig轉換法預測鋼筋混凝土結構之損傷狀態
指導教授:梁明德
學位類別:碩士
校院名稱:國立海洋大學
系所名稱:河海工程學系
學門:工程學門
學類:河海工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
中文關鍵詞:Kramers-Kronig轉換關係等效電路腐蝕使用壽命協合作用
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本文主要目的是使用Kramers-Kronig轉換關係探討交流阻抗試驗鋼筋混凝土腐蝕抑制劑的效果及二種腐蝕因子之協合效應。首先提出利用Kramers-Kronig轉換關係、Stern-Geary方程式、Kirchhoff方程式、CGI等效電路模型及法拉第定律來探討Gu et al.(1997)交流阻抗法試驗硝酸鈉及二硝苯酸等抑制劑對鋼筋混凝土結構遭受氯離子入侵引致腐蝕之抑制效果,以預估鋼筋混凝土結構的使用壽命做為抑制效果之表達方式。此外,其次再利用Kramers-Kronig轉換關係分析Somuah et al.(1991)以交流阻抗實驗數據來探討硫酸鈉及二氧化碳的協合效應。研究結果顯示:(1). 抑制劑對氯離子的抑制效果為:不含抑制劑<二硝苯酸<硝酸鈉。而氧氣和水會減少鈍態保護膜的使用壽命,致於鋼鋼筋腐蝕時間 約為氯離子由混凝土表面擴散到鈍態保護膜表面時間 的 ~ 。(2). 利用Randle等效電路來分析硫酸鈉及二氧化碳的腐蝕機制,Wenger等效電路來分析硫酸鈉及二氧化碳的協合作用,並由兩者等效電路的電路元件值來判斷出當二氧化碳與硫酸鈉協合作用時,整個腐蝕機制是屬於加速腐蝕。
中文摘要 Ⅰ
英文摘要 Ⅱ
目錄 Ⅲ
表目錄 Ⅴ
圖目錄 Ⅶ
符號說明 ⅩⅠ
第一章 緒論 1
1-1 研究動機 1
1-2 研究目的 1
1-3 研究方法 2
1-4 研究內容 2
第二章 電化學阻抗頻譜方法探討腐蝕抑制劑對氯離子侵蝕鋼筋混凝土
結構物之影響 4
2-1 前言 4
2-2 等效電路模型的應用 6
2-3 Kramers-Kronig轉換理論 6
2-4 CGI電路模型 8
2-4-1 CGI電效電路的應用 10
2-5 利用CGI等效電路預測鋼筋混凝土結構使用壽命 13
2-5-1 鋼筋壽命的推估 13
2-5-2 鈍態氧化膜與混凝土的壽命 14
2-6 範例證明 15
2-7 討論 18
2-8 結論 19
第三章 Kramers-Kronig轉換法探討混凝土劣化之協合效應 20
3-1 前言 20
3-2 等效電路和腐蝕行為的關係 21
3-2-1 Randle 等效電路模型 22
3-2-2 Wenger 等效電路模型 23
3-3 混凝土的電化學腐蝕 24
3-3-1 硫酸鈉對混凝土的腐蝕 25
3-3-2 二氧化碳對混凝土的腐蝕 25
3-3-3 硫酸鈉和二氧化碳的協合作用 26
3-4 實例計算 28
3-4-1 混凝土結構受硫酸鈉的侵蝕 28
3-4-2 混凝土結構受二氧化碳的侵蝕 30
3-4-3 混凝土結構受硫酸鈉及二氧化碳的同時侵蝕 31
3-5 討論 33
3-6 結論 34
第四章 結論與建議 35
4-1 結論 35
4-2 建議 36
參考文獻 93
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