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研究生: 吳志偉
Jhih-wei Wu
論文名稱: 矽質微奈米材料對混凝土工程性質影響之探討
The Study on the Effect of Micro-Nano Siliceous material on the Performance of Concrete
指導教授: 黃兆龍
Chao-long Hwang
口試委員: 鄭大偉
none
王和源
none
楊錦懷
none
學位類別: 碩士
Master
系所名稱: 工程學院 - 營建工程系
Department of Civil and Construction Engineering
論文出版年: 2008
畢業學年度: 96
語文別: 中文
論文頁數: 226
中文關鍵詞: 細飛灰矽灰離心分選奈米材料黃氏富勒緻密混凝土微觀顯微圖片粒料界面
外文關鍵詞: fine fly ash, silica fume, hydrocyclone classification, micro-nano sized particle, Hwang-Fuller’s Demsified Mixture Design Algorit, micrograph, interface transition zone
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  • 本研究主要探討矽灰及細粒化飛灰二種奈米矽質材料對混凝土的影響性。飛灰細粒化係採用離心(渦錐)分選技術,使之接近奈米尺寸,渦錐分選上以礦漿濃度與噴流壓力為變數,利用粒徑分佈、中位徑(D50)以及產率分析,評估結果以礦漿濃度為10%和噴流壓力20psi有較佳渦錐分選效益,其D50較於原樣飛灰之D50降低61%。分選之溢流(細粒)飛灰與其他矽質微奈米材料(原樣飛灰、矽灰),以黃氏富勒緻密配比設計法設計高性能混凝土,以探討添加矽質奈米材料對其工程性質之影響。結果顯示,添加細粒化飛灰之混凝土,其新拌、硬固及耐久性質皆優於添加原樣飛灰之混凝土;與添加矽灰之混凝土相比較,除抗壓強度之外,其他工程性質以添加細粒飛灰之混凝土優於添加矽灰之混凝土。電子顯微圖片顯示混凝土使用細粒之矽質微奈米材料,對粒料界面除有填塞效益外,並透過卜作嵐反應改善界面之缺陷。


    The study is mainly to observe the effect of adding fine fly ash and silica fume on the performance of concrete. The fly ash grain is fined by employing hydrocyclone classification technology to approach micro-nano sized particle. The parameters for hydrocyclone classification are the concentration of fly ash pulp and the jet pressure, and the final process chosen is based on particle size distribution, mean diameter (D50), and the production rate. It indicates the one with 10% fly ash concentration and 20 psi jet pressure has the optimum performance of hydrocyclone classification. The D50 of fined fly ash reduced 61% as compared to that of raw fly ash. Overflow fly ash, fine fly ash, and siliceous micro-nano material (raw fly ash and silica fume) are used to design high performance concrete by Hwang-Fuller’s Densified mixture design algorithm and evaluated their effects on the performance of concrete. The results show that through the fresh, hardened and durability properties of concrete, the one with fine fly ash are superior to that with the raw fly ash. Besides compressive strength, the engineering properties of concrete with the addition of fine fly ash is superior to those with silica fume. The SEM micrograph indicates the addition of siliceous micro-nano size material does improve the interface transition zone through dense filled effect and the Pozzolanic reaction.

    中文摘要 I 英文摘要 II 誌謝 III 總目錄 V 表目錄 IX 圖目錄 XI 變數代號及符號說明 XIX 第一章 緒論 1 1.1研究動機 1 1.2研究目的 3 1.3 研究範圍及限制 3 1.4 研究步驟及流程 5 1.5 預期成果與貢獻 6 第二章 文獻回顧 7 2.1奈米材料 7 2.1.1 奈米材料的特徵 8 2.1.2 奈米尺寸所產生的效應 8 2.2飛灰粒徑細化 10 2.2.1飛灰粒徑細化技術 10 2.2.2飛灰粒徑細化對水泥材料影響 13 2.3 矽質奈米材料(卜作嵐材料) 15 2.3.1卜作嵐材料定義 15 2.3.2 矽質奈米材料特性 16 2.3.3卜作嵐反應之封孔效益 19 2.4 混凝土粒料界面 19 2.4.1 混凝土界面的形成 19 2.4.2 界面的結構 20 2.4.3 界面(界面區)對混凝土性質的影響 21 2.4.4 孔隙與界面微觀結構改善 22 2.5 配比設計 23 2.5.1 黃氏富勒緻密配比設計 23 第三章 試驗計劃 35 3.1試驗材料 35 3.1.1 水泥 35 3.1.2 水 36 3.1.3 粗、細粒料 36 3.1.4 原樣飛灰 36 3.1.4 矽灰 37 3.1.5 強塑劑 37 3.2試驗變數及項目 37 3.2.1 試驗變數 37 3.2.2 試驗項目 38 3.3試驗方法及設備 39 3.3.1 材料基本試驗 39 3.3.2 離心(渦錐)分選 41 3.3.4 黃氏富勒緻密混凝土試驗 46 3.3.4.1 混凝土新拌性質試驗 47 3.3.4.2 混凝土硬固性質試驗 49 3.3.4.3 混凝土耐久性質試驗 51 3.3.4.4 混凝土微觀性質觀測 54 第四章 結果分析與討論 73 4.1 濕式離心(渦錐)分選後飛灰與原樣飛灰之物理及化學性質 73 4.1.1 濕式離心(渦錐)分選後飛灰與原樣飛灰之物理性質 73 4.1.1.1 粒徑分佈 73 4.1.1.2 電子顯微鏡觀察(SEM) 75 4.1.1.3 卜作嵐材料活性指數 76 4.1.2 濕式離心(渦錐)分選後飛灰與原樣飛灰之化學性質 78 4.1.2.1 成分分析 78 4.1.2.2 燒失量分析 79 4.1.2.3 pH值測定與能量分散光譜(EDS)成分分析 80 4.2 富勒曲線粒料堆積分析 80 4.3 矽質奈米材料混凝土及水泥漿之工程性質 81 4.3.1 新拌性質分析 81 4.3.1.1 工作性 81 4.3.1.2 單位重 84 4.3.1.3 水化熱偵測 86 4.3.2 硬固性質分析 89 4.3.2.1 抗壓強度 89 4.3.2.2 水泥強度效益 94 4.3.2.3 超音波傳速率 96 4.3.2.4 塑性裂縫(裂縫敏感度試驗) 98 4.3.3 耐久性質分析 101 4.3.3.1 表面電阻 101 4.3.3.2 氯離子電滲 103 4.3.3.3 吸水率 105 4.3.4 微觀試驗分析 107 4.3.4.1壓汞孔隙(MIP) 108 4.3.4.3電子顯微鏡(SEM) 110 4.3.4.4能量分散光譜(EDS)成分分析 113 4.4 混凝土性質綜合討論 114 第五章 結論與建議 216 5-1 結論 216 5-1-1渦錐分級飛灰之結論 216 5-1-2 矽質奈米混凝土之工程性質之結論 217 5-2 建議 220 參 考 文 獻 221

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