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研究生:蕭遠智
研究生(外文):Yuan-Chih Hsiao
論文名稱:鹼活化電弧爐還原碴之水化反應特性
論文名稱(外文):Hydration properties of alkali-activated refining slag
指導教授:黃偉慶
學位類別:碩士
校院名稱:國立中央大學
系所名稱:土木工程研究所
學門:工程學門
學類:土木工程學類
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:177
中文關鍵詞:乾縮還原碴鹼活化劑速凝
外文關鍵詞:reining slagalkali-activatorrapid settingd
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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。
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.
目錄
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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