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系統識別號 U0026-2407201812385700
論文名稱(中文) 還原碴再利用於膠結材料及膨脹行為改善之研究
論文名稱(英文) Ladle Furnace Slag Reused in Bonding Materials and Improvement of Expansion Behavior.
校院名稱 成功大學
系所名稱(中) 資源工程學系
系所名稱(英) Department of Resources Engineering
學年度 106
學期 2
出版年 107
研究生(中文) 曾雅玟
研究生(英文) Ya-Wen Tseng
學號 N46051067
學位類別 碩士
語文別 中文
論文頁數 111頁
口試委員 指導教授-陳昭旭
口試委員-余憲睿
口試委員-廖志中
口試委員-林志平
口試委員-張慧蓓
中文關鍵字 還原碴  膠結材料  鹼活化  熱壓膨脹 
英文關鍵字 LFS  Bonding Materials  Alkali Activation  Volume Stability 
學科別分類
中文摘要 還原碴是電弧爐煉鋼過程中還原期所產生之工業副產品,早期多被認定為工業廢棄物。然而,由於還原碴的成分與組成和卜特蘭水泥以及常用的卜作嵐材料(飛灰、水淬爐石粉等)相當接近,故具有作為膠結材料替代水泥之潛力,現今多朝資源化再利用作為混凝土材料的方向進行研究,而非單純視為工業廢棄物來進行處置。
為了達到提升還原碴去化量與減少水泥用量之目的,本研究將以還原碴作為膠結材料替代水泥,並找出最佳還原碴水泥配比設計,且利用添加鹼活化劑之方式提升去化量及改善膨脹行為。所製備的砂漿試體則透過抗壓、熱壓膨脹、凝結時間和微觀分析等試驗項目,探討還原碴細度變化、還原碴用量與水膠比用量等應用方式,對砂漿試體的工程特性影響之差異,評估還原碴作為膠結材料取代水泥,製備成還原碴水泥的最佳應用方式和最佳配比。
從研究結果中可得知,無論以何種方式作為砂漿試體的膠結材料,隨還原碴用量增加,對強度發展與膨脹行為等都有負面影響,還原碴水泥之還原碴用量建議以膠結材料重量百分比的20 %為上限。而還原碴的細度變化則對強度發展趨勢與膨脹行為無嚴重的影響。在添加鹼活化劑的應用方式中,經過鹼活化劑之添加,膨脹行為可以大幅改善,且在替代量提升中可發現细度增加可以提升抗壓強度與降低膨脹量,添加鹼活化劑後替代量可達40 %(细度5000cm2/g的條件下),為極具潛力的膠結材料應用形式。
英文摘要 Bacuse the composition of Ladle furnace slag (LFS) is fairly similar to Ordinary Portland cement (OPC), it has the potential to be the bonding material or admixture for concrete. Therefore, instead of simply seeing it as a waste, recent studies focus mainly on recycling and reuse. In order to eliminate LFS and reduce cement consumption, this study will be divided into three parts to discuss the feasibility of LFS reutilization for cement and the improvement of expansion behavior: (1) Analysis of the basic characteristics of LFS and the relationship between grinding fineness and engineering properties, (2) Discussion on the relationship between water-cementitious material ratio (W/CM), LFS replacement cement dosage and engineering characteristics, and (3) Making alkali-activated cement mortar to explore the improvement of expansion behavior and compressive strength. After the above three parts of the results, we can get the best design of mix proportion of a group of blended cement of Ladle furnace slag and Ordinary Portland cement. The design of mix proportion of this group is evaluated by CNS 15286 to determine that the ratio meets the standards of hydraulic cement. According to the results, excessive LFS can have a negative impact on engineering performance, such as strength development, volume stability, and the like. And through the research results, the best ratio design is: LFS raw material over #30 sieve fineness is 1200 cm2/g, cement replacement amount is 20 wt%, water-cementitious material ratio (W/CM) is 0.485. According to the results of alkali-activated cement mortar, it is known that the addition of cement mortar to alkali-activated chemicals can effectively improve the expansion behavior, but the addition of an excess of alkali activator will lead to the negative impact of strength development, and the study found that FLS can be regarded as Alkali activators are used.
論文目次 摘 要 I
SUMMARY II
誌 謝 XIII
目錄 XIV
表目錄 XVI
圖目錄 XVIII
第一章 緒論 1
1.1研究動機與目的 1
1.2研究方法與內容 2
第二章 文獻內容 5
2.1電弧爐煉鋼與還原碴之簡介 5
2.2還原碴之去化與再利用 10
2.3水泥之水化反應 14
2.4鹼活化之反應機制與工程特性 25
第三章 研究方法與試驗設備 32
3.1研究架構與試驗流程 32
3.2實驗材料介紹 39
3.3試驗方法與設備介紹 43
第四章 結果與討論 69
4.1原料基本特性分析 69
4.2細度對還原碴水泥工程特性之影響 74
4.3還原碴水泥之替代量與工程特性之影響 81
4.4還原碴水泥之水膠比與工程特性之影響 89
4.5最適配比還原碴水泥之基本特性分析 92
4.6鹼活化對還原碴水泥之影響 96
第五章 結論與建議 105
5.1結論 105
5.2建議 106
參考文獻 107
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