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姓名 郭明峰(Ming-Feng Kuo)  查詢紙本館藏   畢業系所 土木工程學系
論文名稱 皂土-碎石混合物之壓實性質
(The compaction properties of bentonite-crushed rock mixtures)
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摘要(中) 高放射性廢料於地下深層處置中常利用緩衝材料阻隔放射性核種外移,目前之候選緩衝材料以膨潤土為首要考慮對象。目前世界各國主要以單軸壓實法製作緩衝材料塊體,因壓實過程中材料與壓實模具間會產生壁面摩擦力,故無法有效獲得塊體實際壓實應力與密度之關係。故本研究依據瑞典單軸壓實法之概念,及直接量測法量測壁面摩擦力之方式設計壓實模具,進行不同膨潤土重量壓實試驗,並利用Gurnham提出之壓縮方程式,求取膨潤土無摩擦力影響之壓縮曲線。
同時針對可能影響壓實行為之因素進行分析探討。最後利用Tien等人(2004)所提出膨潤土-碎石混合物壓縮曲線之預測方法,預測純膨潤土添加不同體積比之花崗岩碎石及矽砂時的壓縮曲線。
摘要(英) Buffer materials are used to retard the migration of radionuclides emitted from high level wastes in a repository. Bentonite is the primary candidate for the buffer materials at the present day. The uniaxial compaction method is generally used to produce the bentonite block. The wall friction is produced between the materials and the compaction mold during the compaction process, so we can’t obtain the relationship between the actual compaction stress and the density of the bentonite block. The first target for this study is to search the literature of compaction techniques for buffer materials. Designing the compaction mold according to the concept of uniaxial compaction method. Adopting the direct method to measure the wall friction during bentonite block compaction and ejection. Using the compression equation developed by Gurnham to obtain the friction-free compressive curve of bentonite block. To analyze and discuss the effects that will influence the compaction behavior. To examine the effect of crushed rock content on the compaction characteristics, a series of uniaxial compaction tests for bentonite-crushed rock mixtures with different sand fractions (by weight) were performed. A prediction model based on micromechanics for predicting the compaction curves of bentonite-crushed rock mixtures was proposed by Tien et al. (2004).
關鍵字(中) ★ 緩衝材料
★ 膨潤土
★ 壓實
★ 壁面摩擦力
★ 壓縮曲線
關鍵字(英) ★ Wall fraction
★ Bentonite
★ Compaction
★ Compaction curve
★ Buffer material
論文目次 中文摘要 I
英文摘要 II
誌 謝 III
目 錄 IV
圖目錄 VIII
表目錄 XII
第一章 緒 論 1
1.1 研究動機與目的 1
1.2 研究方法 2
1.3 論文內容 2
第二章 文獻回顧 4
2.1 放射性廢棄物簡介 4
2.2 放射性廢棄物處置概念 5
2.2.1 低放射性廢棄物處置 5
2.2.2 高放射性廢棄物處置 7
2.3 緩衝材料之概念與功能 9
2.4 緩衝材料壓實技術分類 11
2.5 壁面摩擦效應對單軸壓實法壓製塊體之影響 15
第三章 壁面摩擦力量測方法及壓實模具設計 16
3.1 壁面摩擦力量測方法及量測誤差比較 16
3.1.1 間接量測法 16
3.1.2 直接量測法 18
3.1.3 誤差來源與量測誤差比較 20
3.1.3.1 壁面摩擦力量測誤差比較 20
3.1.3.2 密度量測誤差比較 25
3.1.3.3 推出力量測誤差比較 30
3.1.4 綜合討論 32
3.2 壓實模具設計 33
3.2.1 壓實模具設計概念 34
第四章 試驗材料、儀器及試驗程序 37
4.1 試驗材料選取 37
4.1.1 美國皂土 37
4.1.2 日興土 37
4.1.3 花崗岩碎石 40
4.2 材料準備 41
4.2.1 膨潤土 41
4.2.2 花崗岩碎石 45
4.3 試驗儀器設備 45
4.3.1 壓力系統 45
4.3.2 環型荷重計 47
4.3.3 位移計 47
4.3.4 資料擷取系統 48
4.3.5 顎式碎石機 49
4.4 壓實試驗程序 49
4.4.1 膨潤土塊體壓實程序 49
4.4.2 膨潤土塊體推出程序 50
第五章 壓縮曲線特性 52
5.1 壓縮方程式 52
5.2 無摩擦力影響之壓縮曲線 52
5.2.1 求取無摩擦力影響之壓縮曲線的方法 54
5.2.1.1 選用之壓縮方程式 54
5.2.1.2 不同膨潤土重量壓實試驗(壁面無潤滑情況) 54
5.2.1.3 不同膨潤土重量壓實試驗(壁面潤滑情況) 64
5.2.2 綜合討論 69
5.3 影響壓實行為之因素 70
5.3.1 壓實速率 70
5.3.2 壁面條件 75
5.3.3 膨潤土重量 81
5.3.4 碎石含量 86
5.3.5 碎石粒徑 92
5.3.6 含水量 96
第六章 模式預測皂土-碎石混合物之壓縮曲線 103
6.1 微分模式基本概念 106
6.2 加壓階段模擬 109
6.3 預測成果說明 111
第七章 結論與建議 116
7.1 結論 116
7.2 建議 118
參考文獻 119
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指導教授 田永銘、黃偉慶
(Yong-Ming Tien、Wei-Hsing Huang)
審核日期 2004-7-19
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