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研究生:楊文怡
研究生(外文):Wen-Yi Yang
論文名稱:黏土漿體流變性之量測
論文名稱(外文):Experimental Study of The Rheological Behaviors of Clay Grout
指導教授:蔡佐良蔡佐良引用關係
指導教授(外文):Cho-Liang
學位類別:碩士
校院名稱:國立雲林科技大學
系所名稱:營建工程系碩士班
學門:工程學門
學類:土木工程學類
論文種類:學術論文
畢業學年度:92
語文別:中文
論文頁數:101
中文關鍵詞:流變性
外文關鍵詞:Rheological
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近年來有許多學者以賓漢流體模式來闡述新拌混凝土之流變性,本研究是將流體理論模式導入均質流體流經圓球之理論中,量測圓球所受阻力,以計算流體之黏滯係數μ及降伏剪應力 ,以代表該流體之流變行為,此試驗方法稱之為移動球法,試圖以移動球法精確且穩定的量取賓漢流體之黏滯係數μ及降伏剪應力 ,但因混凝土有凝結之問題使實驗無法順利進行,故採用性質相似黏土漿體取代之。

經麥芽糖漿試驗後發現移動球法可測得穩定且精確的黏滯係數μ及降伏剪應力 ,當漿體改變為黏土漿體時,經沉降試驗證實可忽略黏土漿體所造成的沉降效應。而黏滯係數μ會隨著球體表面的變化隨之改變,因此,不使用鋼球採用陶球較為適當,且經試驗後發現,慢速度並不符合理論推導故將使用快速度進行試驗。

不論含水量為何皆可測得誤差量較小的降伏剪應力 ,但黏滯係數μ存在著球徑效應之影響,且隨著含水量的增加其所需之拉力及黏滯係數μ與降伏剪應力 隨之減少。若再將漿體顆粒放大,於黏土將體中加砂,發現此試驗方法無法量得黏滯係數μ,因此,應將此試驗方法應加以修正,使適用流體之範圍更加廣大。
Recently, many researchers describe the behavior fresh concrete by Bingham fluid model. In this study, Bingham model is applied in the theoretical solution of Stokes'' flow, which describes the force applied on a sphere in fluid flow. The solution is used to calculate the Bingham constants, shear yield stress and viscosity, of fluid from the force measured experimentally, which stand for the Rheological properties of the fluid. This method is named moving object method. The force pulling a sphere to move steadily in fluid can be used to calculate Bingham constants precisely. However, normal fresh concrete hardens swiftly. Clay grout which is similarly to fresh cement and won''t harden is used.
Maltose was tested to gain confidence in the method. When clay grouts with different moisture concentrations were tested, the Bingham constants can be obtained easily, and the data were steady. However, the data of the viscosity seems to be slightly dependent on the radius of the sphere, which implies some imperfection of this method requiring some improvement in the future.
目 錄
中文摘要………………………………………………………………………….Ⅰ
英文摘要……………….…………………………………………………………Ⅱ
致謝……………………….………………………………………………………Ⅲ
目錄……………………………………….………………………………………Ⅳ
圖目錄……………………………………….……………………………………Ⅵ
表目錄………………………………………….…………………………………Ⅹ
符號說明………………………………………………………….……….……ⅩⅡ
第一章 緒論 1
1.1 研究動機 1
1.2 研究目的 1
1.3 研究方法 2
1.4 研究流程 2
第二章 文獻回顧 3
2.1 質流基本原理 3
2.1.1 質流之定義 3
2.1.2 黏滯性之定義 4
2.1.3 黏性流體之分類 6
2.2 水泥漿之質流行為與模式 10
2.3 水泥砂漿之質流行為與模式 11
2.4 新拌混凝土之質流行為與模式 12
2.5 新拌混凝土之流變性 14
2.5.1 新拌混凝土流變性之定義 14
2.5.2 影響新拌混凝土流變性之因素 15
2.6 一般常用之混凝土流變儀 18
2.6.1 可得一個參數之試驗 18
2.6.2 可得二個參數之試驗 22
第三章 理論推導 27
第四章 流變性之量測實驗計劃 34
4.1 實驗設備 34
4.2 黏土實驗 38
4.2.1 實驗參數 38
4.2.2 實驗步驟 38
4.3 沉降實驗 47
4.4 麥芽糖漿試驗 48
第五章 黏土漿體實驗數據之分析與討論 52
5.1 各類球拉力與速度關係之分析 52
5.2 陶球於不同含水量之分析 53
5.2.1 含水量為50%之分析 53
5.2.2 含水量為55%之分析 54
5.2.3 含水量為60%之分析 55
5.3 黏土漿體加砂之分析 56
第六章 結論與建議 99
6.1 結論 99
6.2 建議 100
參考文獻 101
參考文獻

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