| 姓名 |
蕭遠智(Yuan-Chih Hsiao)
查詢紙本館藏 |
畢業系所 |
土木工程學系 |
| 論文名稱 |
鹼活化電弧爐還原碴之水化反應特性
(Hydration properties of alkali-activated refining slag)
|
| 相關論文 | |
| 檔案 |
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| 摘要(中) |
鋼筋混凝土結構物中所使用之水泥屬高耗能產物，在能源及資源日益貧乏的今天，尋求具有良好性質之替代性材料將是未來工程界不可避免的發展趨勢，本文就電弧爐煉鋼所產生之爐石-還原碴，運用添加鹼活化劑之方法提昇其性質做一探討。矽酸鈉、碳酸鈉、氫氧化鈉及磷酸鈉等為一般常用於提昇灰碴性質之活化劑，因其具有高pH值的特性而被稱為鹼活化劑；根據以往研究指出經鹼活化劑激發其活性之灰碴具有較佳抗壓強度、耐久性及抗化學侵蝕之能力，但因鹼活化劑快速的激發效果常有其負面之影響，如速凝、乾縮量大的缺點。
本文除對碳酸鈉、氫氧化鈉及磷酸鈉進行試驗外，特別針對矽酸鈉添加於還原碴之提昇效果進行探討；試驗結果顯示，在水膠比為0.5之純還原碴漿體，其抗壓強度有隨矽酸鈉添加濃度增加而增加的趨勢；而在收縮量與速凝行為之表現上亦隨濃度增加而有愈形明顯之趨勢。另外，在抑制收縮的試驗中，以添加石膏與提昇養治溫度兩種方式所得之抑制效果最好；而在以添加輸氣劑作為抑制收縮之方法中，其效果雖不及前兩者，但在抑制收縮之成效上卻有隨劑量增加而持續提昇之穩定特性。無論何種抑制收縮之方法，對抗壓強度均有其負面之影響，而對凝結時間而言皆具緩凝之效果。 |
| 摘要(英) |
The cement used in the construction of reinforced concrete is the highly consumable production. It is impossible in future to avoid the trend that in engineering. People look for the good qualitative aggregate, which can replace the first one. This paper is discussing about the usage of refining slag of steel-making of arc furnace, and of alkali activator. As usual, the sodium silicate, sodium carbonate, sodium phosphate and sodium hydroxide are named both “Activator” and “Alkali-Activator” after its pH. The long-chapter researches report that the slag, which is aroused by alkali activator, is capable of compressive strength, durability and resistance to chemical attack; however, the influence aroused by alkali activator is also prone to the defect of rapid setting, a plenty of drying shrinkage.
Except the experiment with sodium silicates, sodium hydroxides and sodium phosphates, this paper especially researches the influence of refining slag, whereby the sodium silicates put. After the experiment, we found that the pure refining slag with o.5 w/b, whose compressive strength must be added, is following the dosage of the sodium silicate; the behavior of drying shrinkage and rapid setting must be evident, are also following the dosage of the sodium silicate. In addition, the most effective method were adding gypsum and raising temperature in the experiment of the restraining shrinkage; the effect which adding air-entraining isn’t as well as the methods of adding gypsum and raising temperature, but it possesses better stability and the property which shrinkage must be reduced, is following the dosage of medicament. All of methods about restraining shrinkage in this paper are not beneficial to the compressive strength and the effect of the rapid setting is light. |
| 關鍵字(中) |
★ 鹼活化劑
★ 還原碴
★ 乾縮
★ 速凝 |
關鍵字(英) |
★ reining slag
★ alkali-activator
★ rapid setting |
| 論文目次 |
目錄 I
圖目錄 VI
表目錄 XI
第一章 序論 171
1.1研究動機 1
1.2研究目的 2
1.3研究內容及方法 3
第二章 文獻回顧 4
2.1電弧爐煉鋼廢爐碴-還原碴 4
2.1.1 產源、產量及特性 4
2.1.2 電弧爐煉鋼廢爐碴之物化特性 5
2.2卜作嵐反應 7
2.3常見水化產物之種類及特性 8
2.4提昇卜作嵐活性之技術 12
2.5活化劑處理技術 15
2.5.1活化劑種類 15
2.5.2添加活化劑之方式 25
2.6影響鹼活化效果之因素 26
2.6.1材料種類之影響 26
2.6.2活化劑種類之影響 28
2.6.3活化劑濃度之影響 29
2.6.4活化劑濃度及灰碴屬性之交互影響 30
2.6.5灰碴細度之影響 31
2.6.6水灰比之影響 31
2.6.7添加方式之影響 32
2.7運用鹼活化技術之優缺點 34
2.7.1鹼活化劑之優點 34
2.7.2鹼活化劑之缺點 35
2.7.2.1速凝 35
2.7.2.2收縮 39
2.7.2.3水化熱 47
2.8抑制收縮之方法 52
2.8.1抑制方式-添加藥劑 52
2.8.2抑制機理 54
第三章 實驗計畫 57
3.1實驗材料 57
3.2實驗設備及儀器 63
3.2.1瓷球研磨機 63
3.2.2氣透儀 63
3.2.3 高溫電爐 64
3.2.4數位式電子天平 65
3.2.5水泥漿砂拌合機 65
3.2.6 恆溫恆溼控制箱 66
3.2.7承壓座 66
3.2.8萬能試驗機 67
3.2.9數位式比長計 68
3.2.10 費開氏試驗儀 68
3.2.11 pH 計量儀 69
3.2.12 X光繞射分析儀（XRD） 70
3.2.13壓汞式孔隙分析儀（MIP） 70
3.2.14 場放射-掃描式電子顯微鏡（FE-SEM） 71
3.3實驗流程及方法 72
3.3.1實驗設計 72
3.3.2實驗方法 78
3.3.2.1 新拌性質試驗 78
3.3.2.2 硬固性質試驗 79
3.3.2.2 微觀試驗 80
3.3.3 考慮變數 82
第四章 結果與分析 86
4.1基本性質分析 87
4.1.1物理性質 87
4.1.2化學性質 91
4.2還原碴之卜作嵐反應試驗 95
4.2.1卜作嵐活性指數 95
4.2.2 電子顯微鏡觀察 103
4.3添加鹼活化劑提升還原碴之活性 104
4.3.1粉末型鹼活化劑對還原碴活化效果 105
4.3.2溶液型鹼活化劑對還原碴活化效果 111
4.3.2.1鹼活化劑對抗壓強度之影響 111
4.3.2.2鹼活化劑對凝結時間之影響 124
4.3.2.3鹼活化劑對收縮量之影響 130
4.3.2.4 電子顯微鏡觀察 137
4.3.3添加鹼活化劑之爐石與還原碴漿體之比較 139
4.3.4鹼活化漿體之長期抗壓強度 141
4.4抑制因鹼活化劑產生之收縮 143
4.4.1抑制方式對抗壓強度之影響 144
4.4.2抑制方式對凝結時間之影響 149
4.4.3抑制收縮之效果 153
4.4.4微觀分析 163
第五章 結論與建議 165
5.1結論 165
5.2建議 170
參考文獻 171 |
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| 指導教授 |
黃偉慶(Wei-Hsing Huang)
|
審核日期 |
2002-6-26 |
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