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研究生:李文宏
研究生(外文):Wen-Hong Li
論文名稱:光纖量測技術於水泥質材料的熱膨脹系數與自體收縮之研究
指導教授:詹穎雯詹穎雯引用關係
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:土木工程學研究所
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:中文
論文頁數:150
中文關鍵詞:光鮮纖感測器自體收縮
外文關鍵詞:shrinkageautogenous
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  • 被引用被引用:3
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水泥質材料早齡期體積變形過程,水泥從拌合水至硬固的階段,此過程的量測十分困難,在以往的研究中,無不嘗試在試驗裝置作突破。在各學者先進的試驗裝置中,各有其優點與缺憾,主要有三點:1.精度要高;2.裝置的有效感測值於何時發生;3.水泥質材料從拌和水至硬固階段應有溫度所造成熱膨脹,此溫度所造成的影響應加以考慮。基於以上考量,本研究嘗試使用布拉格光纖光柵作為感測器,應用其高精度量測水泥漿體早齡期體積變形,設計裝置量測水泥漿體早齡期對光纖有效握裹強度,以定義何時漿體的體積變形能完全傳遞到光纖感測器上,並應用成熟度的概念與光纖波長多工的特性,測定水泥早齡期熱膨脹係數變化以求出溫度造成漿體的膨脹量,並進而求得試體的自體收縮量。

第一章 緒論 1
1.1研究動機 1
1.2研究內容 3
第二章 文獻回顧 7
2.1卜作嵐材料 8
2.2水泥漿水分存在形式[1,2] 9
2.3混凝土收縮變形種類[1,2] 11
2.3.1塑性收縮(plastic shrinkage] 11
2.3.2化學收縮(Chemical Shrinkage)[5] 12
2.3.3自體收縮(Autogenous Shrinkage)[5] 13
2.3.4乾燥收縮(Drying Shrinkage] 14
2.3.5自體收縮與化學收縮[5,6,7] 14
2.4水泥質材料收縮變形機制 15
2.4.1水化反應體積變化與自乾現象[3] 16
2.4.2乾燥現象造成收縮的機制 17
2.5溫度變形與熱膨脹係數 19
2.6影響混凝土自體收縮的原因 21
2.7成熟度法 23
2.7.1理論發展 23
2.7.2成熟度與成熟度函數 25
2.8早齡期體積變形量測與影響因子 27
2.8.1早齡期水泥質材料體積變形試驗方式 27
2.8.2早齡期體積變形的影響因子 32
2.9混凝土早齡期試驗其他方法[41,42,43] 33
第三章 光纖量測技術 35
3.1光纖感測器之種類[44] 35
3.1.1以感測器元件分類 35
3.1.2以解調方式分類 36
3.2光纖光柵感測器 37
3.2.1光柵的光學性質[38] 37
3.2.2FBG應變與波長飄移關係 39
3.2.3溫度變化與波長飄移關係 39
第四章實驗計劃 41
4.1國內外早齡期量測方法比較 41
4.2實驗內容 43
4.3實驗材料 46
4.4實驗儀器與設備 46
4.5配比設計 49
4.6試驗程序 49
4.6.1有效握裹力試驗[49] 49
4.6.2早齡期體積變形量測試驗[49] 51
4.6.3自體收縮試驗 53
第五章 結果與討論 55
5.1量測資料處理[49] 55
5.2有效握裹試驗 58
5.2.1分析流程 58
5.2.2分析結果 60
5.2.3與文獻比較 60
5.3早齡期變形式驗結果(測定TDC) 61
5.3.1分析流程 61
5.3.2分析結果 62
5.3.3與文獻比較 64
5.4自體收縮試驗 65
5.4.1實驗流程 66
5.4.2分析結果 67
5.4.3與文獻比較 68
第六章結論與建議 71
6.1結論 71
6.2建議 72
參考文獻 73















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