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Student Number 943202043
Author Yan-hua Guo(郭硯華)
Author's Email Address 943202043@cc.ncu.edu.tw
Statistics This thesis had been viewed 1724 times. Download 10 times.
Department Civil Engineering
Year 2006
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title The use of alkali-activated electric-arc furnace reductive slag as binding material for concrete
Date of Defense 2007-07-06
Page Count 126
Keyword
  • alkali-activator
  • electric-arc furnace reductive slag
  • flue gas desulfurization gypsum
  • Abstract The reductive slag is a byproduct of steel-making industry using electric-arc furnace. In order to replace some cement materials, reductive slag can be processed to make its property similar to the binder of Portland cement. Meanwhile, this achieves the purpose of recycling.
    This study used alkali activator to improve the activity of reductive slag so as to replace Portland cement as binder in concrete. By using sodium silicate and sodium hydroxide as alkali-activator, a high-pH environment is generated to excite the binding characteristics of reductive slag, and thus develops compressive strength of the mixes.
    The binding quality of reductive slag is influenced by the processes of steel-making. The study has established the procedures in the evaluation of the binding quality of reductive slag. Using this procedure, it is possible to determine if each batch of reductive slag is suitable for alkali activation directly or not. The reductive slag not satisfying the requirement is recommended to be added a 20~30% blast furnace slag (BFS) for improvement in activation effects. Test results show that alkali-activated reductive slag satisfies compressive strength requirement for type I Portland cement. In addition, the addition of desulphurization gypsum to the reductive slag-BFS mixes will reduce the shrinkage of alkali-activated reductive slag.
    Alkali-activated reductive slag as binding material is further extended to precast concrete products by applying it to the manufacture of concrete bricks. The compressive strength of mixes prepared using alkali-activated slag and fine aggregates was found to satisfy the domestic standard for Grade A concrete brick.
    Table of Content 目錄
    目錄I
    圖目錄IV
    表目錄IX
    第一章 前言1
    1.1 研究動機1
    1.2 研究目的2
    1.3 研究方法2
    第二章 文獻回顧4
    2.1電弧爐煉鋼4
    2.1.1電弧爐煉鋼簡介4
    2.1.2電弧爐煉鋼廢爐碴-還原碴之產量及特性5
    2.2卜作嵐反應9
    2.3常見水化產物之種類及特性10
    2.4鹼活化劑處理技術14
    2.4.1鹼活化劑之反應機理14
    2.4.2影響活化效果之因素17
    2.4.3運用鹼活化劑技術之優缺點22
    2.5硬固混凝土之體積變化28
    2.5.1混凝土體積變化之種類28
    2.5.2硬固水泥漿體收縮行為31
    2.5.3水泥漿體之孔隙水及孔隙結構32
    2.6抑制收縮之方法36
    第三章 實驗材料39
    3.1實驗材料39
    3.2實驗設備及儀器43
    3.3實驗流程及方法49
    3.3.1實驗流程49
    3.3.2實驗方法54
    3.3.3配比計算57
    第四章 結果與分析60
    4.1還原碴基本性質分析61
    4.1.1物理性質61
    4.1.2化學性質66
    4.2還原碴品質之基本試驗70
    4.2.1建立鹼活化劑之含鹼當量及鹼模數比70
    4.2.2摻配產業廢石膏對純還原碴活化效果之影響76
    4.3建立還原碴品質標準測試法81
    4.3.1還原碴品質檢驗81
    4.3.2還原碴添加爐石之活化成效84
    4.3.3還原碴添加爐石粉之鹼活化劑濃度評估90
    4.4脫硫石膏對鹼活化還原碴+爐石粉之活化成效影響96
    4.4.1健度及SO3含量檢驗97
    4.4.2脫硫石膏對乾縮之影響100
    4.4.3脫硫石膏對抗壓強度之影響102
    4.5鹼活化還原碴製作混凝土製品104
    4.5.1初步評估鹼活化還原碴之混凝土製品可行性104
    4.5.2水膠比之影響106
    4.5.3細粒料用量之影響110
    4.6微觀分析116
    第五章 結論與建議121
    5.1結論121
    5.2建議122
    參考文獻123
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    Advisor
  • Huang Wei-Hsing(黃偉慶)
  • Files
  • 943202043.pdf
  • disapprove authorization
    Date of Submission 2007-07-20

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