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研究生:黃宏隆
研究生(外文):H.L. Huang
論文名稱:新型聚羧酸系強塑劑對含飛灰水泥漿體流動行為的影響
指導教授:許貫中許貫中引用關係
指導教授(外文):K.C. Hsu
學位類別:碩士
校院名稱:國立臺灣師範大學
系所名稱:化學研究所
學門:自然科學學門
學類:化學學類
論文種類:學術論文
論文出版年:2003
畢業學年度:91
語文別:英文
論文頁數:125
中文關鍵詞:羧酸系強塑劑卜作嵐分子量反應物比例燒失量吸附量
外文關鍵詞:carboxylate-based superplasticizerpozzolanmolecular weightreactant ratioloss of ignitionadsorption amount
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卜作嵐材料與強塑劑都是製作高性能混凝土的重要成份。本論文主要研究水泥、卜作嵐材料與強塑劑三者間之相容性(compatibility)。實驗材料包括第I型波特蘭水泥、飛灰與羧酸系強塑劑(PMAMP),PMAMP係以甲基丙烯酸(MAA)與2-丙烯醯胺-2-甲基丙烷磺酸(AMPSA)為反應物,經自由基聚合反應而得。本研究探討PMAMP分子量、MAA / AMPSA比例、與飛灰燒失量等因素對於水泥漿體之迷你坍度、迷你坍度維持、視黏度、凝結時間的影響,並以強塑劑對漿體顆粒之吸附行為、表面電位等實驗來解釋之。
研究結果顯示添加重量平均分子量(Mw)為5.6 × 104者與MAA / AMPSA = 1 / 1的PMAMP之漿體迷你坍度最佳、視黏度最低,而添加Mw = 3.8×105與MAA / AMPSA = 3 / 2的PMAMP之漿體迷你坍度維持最佳。大體上,飛灰燒失量越低,漿體迷你坍度越佳;飛灰取代量越多時,若強塑劑AMPSA比例大於50%,則漿體迷你坍度、迷你坍度維持越佳。
Pozzolan and superplasticizer are two important components in making high performance concrete. In this research, the compatibility between cement, pozzolan, and superplasticizer was studied.
Experimentally, type I Portland cement, fly ash, and carboxylate- based superplasticizer (PMAMP) were used. PMAMP was prepared from methacrylic acid (MAA) and 2-acrylamido-2-methylpropane sulfonic acid (AMPSA) through free radical copolymerization. The effects of the MAA / AMPSA ratio and molecular weight of PMAMP, and the ignition loss of fly ash on the mini-slump, mini-slump retention, apparent viscosity, and setting time of cement pastes (water / cement = 0.3) were investigated. The results were explained by the adsorption behavior of PMAMP on solid particles and the zeta potential of particles.
It is indicated that cement pastes containing PMAMP with MAA / AMPSA = 1 / 1, Mw (weight-average molecular weight) = 5.6 × 104, show the highest mini-slump, and lowest apparent viscosity. Cement pastes containing PMAMP with MAA / AMPSA = 3 / 2, Mw = 3.8 × 105, show the best mini-slump retention.
Generally, the mini-slump of cement pastes increases with decreasing ignition loss of fly ash. The more fly ash added, the higher the mini-slump and mini-slump retention of cement pastes containing PMAMP (with MAA / AMPSA = 1 or more).
第一章 緒論 1
第二章 文獻回顧 2
2.1 水泥 2
2.1-1 波特蘭水泥之組成 2
2.1-2 波特蘭水泥之水化反應 3
2.2 飛灰 5
2.2-1 飛灰之品質 5
2.2-2 飛灰之化學性質 6
2.2-3 飛灰之物理性質 8
2.2-4 飛灰之卜作嵐反應 9
2.2-5 飛灰與水泥成份之反應 10
2.3 強塑劑 13
2.3-1 強塑劑之種類 13
2.3-2強塑劑之分散機制 17
A.靜電排斥機制 18
B.電雙層理論 19
C.立體障礙機制 22
D.輸氣與水披覆環繞機制 24
2.3-3 強塑劑之吸附行為 25
A.吸附理論 25
B.等溫吸附曲線 25
C.吸附模式 27
D.影響吸附之變因 28
E.相關文獻彙集 30
第三章 研究計劃與實驗方法 32
3.1 實驗流程 32
3.2 實驗方法 32
3.3 實驗變數 32
3.4 實驗材料 35
3.5 實驗儀器 36
3.6 實驗方法 37
3.6-1 PMAMP之合成 37
3.6-2 X光粉末繞射(XRD)分析 40
3.6-3 比表面積分析 40
3.6-4 表面電位測定 41
3.6-5 紅外線(IR)光譜分析 41
3.6-6 粒徑分析 41
3.6-7 核磁共振(NMR)光譜分析 42
3.6-8 掃描式電子顯微鏡(SEM)觀測 42
3.6-9 凝膠滲透層析(GPC)分析 42
3.6-10 水泥漿體拌製 43
3.6-11 水泥漿體視黏度測量 43
3.6-12 水泥漿體擴散直徑與流動性維持測量 43
3.6-13 水泥漿體凝結時間測量 44
第四章 結果與討論 45
4.1 材料基本性質分析 45
4.1-1 強塑劑之基本性質 45
4.1-2 水泥之基本性質 51
4.1-3 飛灰之基本性質 53
4.2 強塑劑分子量對水泥漿體之影響 57
4.2-1 強塑劑分子量對水泥漿體擴散直徑之影響 57
4.2-2 強塑劑分子量對水泥漿體流動性維持之影響 59
4.2-3 強塑劑分子量對水泥漿體視黏度之影響 61
4.2-4 強塑劑分子量對水泥漿體吸附行為之影響 62
4.2-5 強塑劑分子量對水泥漿體表面電位之影響 66
4.2-6 強塑劑分子量對水泥漿體凝結時間之影響 67
4.3 強塑劑單體比例對水泥漿體之影響 84
4.2-1 強塑劑單體比例對水泥漿體擴散直徑之影響 84
4.2-2 強塑劑單體比例對水泥漿體流動性維持之影響 86
4.2-3 強塑劑單體比例對水泥漿體視黏度之影響 87
4.2-4 強塑劑單體比例對水泥漿體吸附行為之影響 88
4.2-5 強塑劑單體比例對水泥漿體表面電位之影響 90
4.2-6 強塑劑單體比例對水泥漿體凝結時間之影響 91
第五章 結論 107
第六章 建議 109
第七章 參考資料 110
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