臺灣博碩士論文加值系統

本文考量氯離子的消耗問題，進而推導出來一個統一的理論來描述電場加速氯離子擴散試驗。在理論當中，基於實驗的事實，假設氯離子消耗對於氯離子增加速率的效果是常數，與時間無關。並且，因為此常數為正，表示實際上氯離子的消耗造成控制體積內氯離子的增加。由此，我們提出這種現象是因為控制體積內的氯離子消耗速率低於因氯離子消耗造成對混凝土內氯離子的吸力效應所致。
經由實驗數據的應證，顯示出本理論可以在統一的邏輯下針對不同的氯離子加速試驗得到相近的擴散係數。由此，可以證實本理論是可行的一種理論。

In this thesis, a unified modified diffusion theorem, considering the consumption of chloride ions in the determine cell, to model the mass transportation of chloride ions for the accelerated chloride diffusion experiments is proposed. In this theorem, the effect of chloride consumption on the volumetric chloride-increasing rate is assumed to be constant (independent of time) based on the facts from experimental data. Furthermore, it is observed from the experiments that the consumption of chloride ions increases the volumetric chloride-increasing rate. From this fact, we proposed two mechanisms to explain the effects of chloride consumption: chloride consumption rate and sucking force due to chloride consumption. And the experimental data shows that the second mechanism is stronger than the first one.
Using various experimental data, we have shown the validity of the current theorem. Basically, our theorem can obtain close diffusion coefficients for all kinds of accelerated chloride diffusion tests (two-cell or three-cell test).

中文摘要 i
英文摘要 ii
目錄 iii
圖目錄 v
表目錄 vi
第一章 緒論
1-1 前言 1
1-2 研究動機與目的 2
1-3 論文範疇 3
第二章 文獻回顧
2-1 前言 5
2-2 混凝土中氯離子的來源及存在的型態 6
2-3 氯離子對鋼筋的腐蝕過程 9
2-4 氯離子在混凝土中的擴散行為 10
2-5 擴散係數隨著齡期的演化 15
2-6 傳統上混凝土內氯離子擴散係數測定方法 17
2-7 加速氯離子遷移試驗 20
第三章 理論推導
3-1 通量方程式 27
3-2 非穩態的擴散：擴散方程式推導、其解以及試驗方法 29
3-3 擬穩態擴散方程式以及求擴散係數方法 34
3-4 考慮修正項的加速氯離子擴散係數 38
第四章 結果與討論
4-1 使用數據 43
4-2 分析方法 47
4-3 基本結果……………………………………………………49
第五章 結論與建議
5-1 結論 58
5-2 建議 59
參考文獻 61
謝誌

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