臺灣博碩士論文加值系統

為符合現今建築物正朝著高層樓、擴大樓層及綠地開放空間的發展趨勢，那麼材料強度及性能上的發展勢必是不可缺少的元素，因此為發展超高強度的混凝土，將以高細度爐石粉為主要之卜作嵐材料，制定出高細度爐石粉高強度混凝土之配比特性，目標在於發展出水膠比、膠結料用量的合宜範圍之混凝土配比，並瞭解高強度混凝土的力學性質，研發適合台灣建築結構之高強度混凝土，期使所發展之高強度混凝土配比在一般具備良好品管水準之混凝土拌和廠皆可拌製，並制定台灣高強度混凝土之規格與標準。
本研究結果為發展出目標強度70MPa與100MPa之兩種混凝土配比，探討水膠比效應、爐石取代量、總粉體含量及齡期時間效應這些配比變數對於抗壓強度的影響，以便作為高強度發展的配比基礎。並進一步進行性質試驗，以瞭解高強度混凝土的力學性質，藉以分析高強度混凝土在單軸壓力下的受力行為以及破壞行為，結果得知高強度混凝土的力學性質有明顯的提升，然而在破壞行為則過於脆性，因此高強度混凝土是需要良好的圍束能力，並瞭解高強度混凝土的收縮性質，這些性質對於應用在建築結構上是相當重要。
並由實驗結果，我們對於ACI現有的經驗規範公式進行比對，結果顯示經驗公式對於彈性模數有高估的情形，而劈裂強度有低估的疑慮，所以根據實驗結果加以修正以符合國內材料之特性。

誌謝I
摘要III
目錄IV
表目錄VIII
圖目錄X
照片目錄XIV
第一章 緒論- 1 -
1.1 研究背景- 1 -
1.2 研究動機與目的 - 1 -
1.3 研究內容- 3 -
第二章 文獻回顧- 5 -
2.1 高強度混凝土之簡介- 5 -
2.1.1 定義- 5 -
2.1.2 不同於普通混凝土之性質- 6 -
2.1.3 高強度混凝土之受力行為- 6 -
2.2 影響混凝土強度之因素- 8 -
2.2.1 水泥漿體- 9 -
2.2.1.1 水灰比- 9 -
2.2.1.2 水泥的水化機理- 9 -
2.2.2 骨材- 11 -
2.2.3 卜作嵐材料- 12 -
2.2.4 界面鍵結強度 - 14 -
2.2.5 孔隙結構- 15 -
2.3 爐石混凝土之性質- 17 -
2.3.1 爐石的成分性質- 18 -
2.3.2 爐石主要水化反應機理- 19 -
2.3.3 爐石對混凝土性質的影響- 20 -
2.4 混凝土之收縮變形- 24 -
2.4.1 混凝土作用水 - 24 -
2.4.2 收縮變形機制 - 25 -
2.4.3 影響高強度混凝土收縮因素- 27 -
2.4.3.1 影響自體收縮之因子- 27 -
2.4.3.2 影響乾燥收縮之因子- 30 -
2.5 混凝土之劈裂強度- 31 -
2.5.1 劈裂試驗- 31 -
2.5.2 劈裂強度與抗壓強度的關係- 32 -
第三章 實驗計畫- 35 -
3.1 實驗背景- 35 -
3.2 實驗內容- 35 -
3.3 高強度混凝土配比設計- 36 -
3.3.1 組成材料- 36 -
3.3.2 活性指數- 37 -
3.3.3 配比設計- 37 -
3.3.4 實驗變數- 38 -
3.4 實驗儀器與設備 - 38 -
3.4.1 大型拌合試驗 - 38 -
3.4.2 小型拌合試驗 - 38 -
3.4.3 性質試驗- 39 -
3.5 試驗內容與方法 - 40 -
3.5.1 砂漿拌合試驗過程- 40 -
3.5.2 混凝土拌合試驗流程- 41 -
3.5.3 抗壓強度之量測- 42 -
3.5.4 彈性模數之量測- 42 -
3.5.5 劈裂抗張試驗 - 43 -
3.5.6 收縮試驗- 44 -
第四章 實驗結果與討論- 46 -
4.1 前言- 46 -
4.2 抗壓強度發展之因素- 46 -
4.2.1 水膠比效應- 47 -
4.2.2 爐石取代效應 - 48 -
4.2.3 齡期時間效應 - 50 -
4.2.4 總粉體量- 51 -
4.2.5 粗細骨材比例 - 52 -
4.3 高強度混凝土之受力行為- 52 -
4.3.1 應力-應變曲線- 52 -
4.3.2 破壞機制- 54 -
4.4 彈性模數- 55 -
4.5 劈裂強度- 59 -
4.5.1 劈張強度發展趨勢- 59 -
4.5.2 劈張強度之預測關係式- 60 -
4.6 收縮性質- 61 -
4.6.1 高強度混凝土之收縮性質- 61 -
4.6.2 高強度混凝土之乾燥收縮- 62 -
第五章 結論與建議- 64 -
5.1 結論- 64 -
5.1.1 配比設計- 64 -
5.1.2 基本性質- 65 -
5.2 建議- 67 -
參考文獻- 69 -

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