臺灣博碩士論文加值系統

本研究主要在探討改變細骨材比例對鹼活化爐石粉混凝土新拌性質、力學性質、耐久性質、物理性質之影響。試驗項目包括單位重、坍度、空氣含量、抗壓強度、劈裂強度、彈性模數、電滲、健性、吸水率、吸水速率、表面電阻試驗等。
由研究結果顯示：鹼活化劑濃度SiO2=106 g/l，Na2O=105 g/l，H3PO4=0.74 M時，可改善鹼活化劑濃度SiO2=122 g/l，Na2O=123 g/l，H3PO4=0.84工作性不足之問題。隨著細骨材比例增加，工作性越差，造成坍度降低，空氣含量增高。在力學性質方面，細骨材比例增加將造成抗壓強度降低，這是因為細骨材為整個鹼活化爐石粉混凝土之最弱面所致，但增加細骨材卻能改善劈裂強度，此乃因鹼活化爐石粉漿體抗拉能力不佳。而隨著細骨材比例增加時，鹼活化爐石粉混凝土的電滲值、吸水率及吸水速率亦有增加之趨勢，此顯示內部有較鬆散的結構組織。然由健性試驗結果可知鹼活化爐石粉混凝土的抗硫酸鹽侵蝕能力係優於普通波特蘭混凝土。

In this study, the effects of Sand/Aggregate ratio (S/A ratio) on the fresh concrete property, mechanical performances, durability and physical properties of the alkali activated slag concrete (AASC). Experiments included the unit weight, slump test, air content, compressive strength, splitting tensile test, elastic modulus, electric permeability, soundness test, sorptivity, absorption rate and four-probe electrical resistivity.
Using the sodium silicate-based activator as SiO2=106 g/l, Na2O=105 g/l and H3P O4 = 0.74 M can achieve a better workability. As increment of fine aggregate, the workability reduced, the slump was lower and the air content increased. Increasing sand resulted in reduction in compressive strength but increment in the splitting tensile strength. Comparing to the paste, the sand itself was a weaker phase in compression but a stronger phase in tension. Experiments showed that increment in sand resulted in higher values in electric permeability, sorptivity and initial absorption rate, which indicated a looser microstructure were found. Soundness test showed that AASC could resist the attack of sulfate more effectively than the ordinary Portland cement concrete.

中文摘要.............................................. i
英文摘要.............................................. ii
目錄.................................................. iii
圖目錄................................................ v
表目錄................................................ vii
第一章 緒論
1-1 研究動機........................................ 1
1-2 研究目的與範圍.................................. 2
1-3 研究方法與流程.................................. 3
第二章 文獻回顧
2-1 鹼活化爐石粉混凝土之發展........................ 5
2-2 爐石性質與鹼活化爐石粉水化歷程.................. 6
2-2-1 爐石性質...................................... 6
2-2-2 鹼活化爐石粉水化歷程.......................... 8
2-3 普通混凝土配比設計.............................. 9
2-3-1 普通混凝土發展歷程............................ 10
2-3-2 普通混凝土配比設計............................ 11
2-4 鹼活化爐石粉混凝土之工作度...................... 24
2-5 鹼活化爐石粉混凝土之緩凝問題.................... 24
第三章 實驗計劃
3-1 實驗變數........................................ 30
3-2 實驗材料........................................ 31
3-3 試驗設備........................................ 37
3-4 試驗方法........................................ 42
3-4-1 新拌性質試驗.................................. 42
3-4-2 力學性質試驗.................................. 43
3-4-3 耐久性質試驗.................................. 45
3-4-4 物理性質試驗.................................. 47
第四章 結果與分析
4-1 前言............................................ 49
4-2 鹼活化爐石粉混凝土之新拌性質探討................ 49
4-2-1 鹼活化劑之配製................................ 49
4-2-2 坍度試驗...................................... 53
4-2-3 單位重試驗.................................... 55
4-2-4 空氣含量試驗.................................. 56
4-3 鹼活化爐石粉混凝土之力學性質探討................ 57
4-3-1 抗壓強度試驗.................................. 57
4-3-2 彈性模數試驗.................................. 62
4-3-3 劈裂強度試驗.................................. 64
4-4 鹼活化爐石粉混凝土之耐久性質探討................ 66
4-4-1 電滲試驗...................................... 66
4-4-2 健性試驗...................................... 70
4-5 鹼活化爐石粉混凝土之物理性質探討................ 72
4-5-1 吸水速率與吸水率試驗.......................... 72
4-5-2 電阻試驗...................................... 76
第五章 結論與建議
5-1 結論............................................ 79
5-2 建議............................................ 81
參考文獻.............................................. 82
謝誌
作者簡歷

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