丙烯酸系粉體聚合物與強塑劑應用於水泥砂漿之反應影響研究

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蕭博元(Po-Yen Xiao) 查詢紙本館藏

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土木工程學系

論文名稱

丙烯酸系粉體聚合物與強塑劑應用於水泥砂漿之反應影響研究

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摘要(中)

土木工程技術日新月異，在材料方面，從礦物摻料到化學摻料均可應用於水泥基材以求改善產品性質，但除了不同的摻料對產品的性質有不同的影響外，混合使用時常會顧此失彼，所以摻料的選擇、使用方法與用量，將是應用上的重要課題。
本研究在符合一般施工條件與考量混凝土工作性不佳的前提下，尋找適當粉體型態的聚合物與促進劑，與水泥混合製成粉體複合水泥，並進而探討其在新拌與硬固漿體的工程性質。另外也添加了數種強塑劑，藉以觀察其對聚合物效用的影響。
新拌漿體的試驗結果顯示粉體聚合物與促進劑的摻用具有30～60分鐘緩凝效果，同時也增加了新拌漿體的流動性，尤其是長時間（90~120分鐘）的流動性增加5~10%。其次，在部分實驗條件下，聚合物對硬固砂漿的抗彎與抗壓強度，有提升的效果；再者，亦有效減少吸水率與吸水膨脹率。另外，為了控制相同起始流度而摻入的強塑劑，種類與用量的不同會影響粉體聚合物對水泥漿體的效用。

摘要(英)

The technique of civil engineering is being continuously updated. The usage of mineral or chemical admixtures in cement can both improve the cement properties. Besides taking into consideration the different effects of different admixtures on cement properties, the selection, application method and quantity of admixtures are also very important issues to be discussed since all factors can hardly be taken care simultaneously during mixture.
Under the general requirements of practical construction and considering the unsatisfactory workability of concrete, we seek by this research a suitable powdered polymer and promoter to be mixed with cement for forming a powdered polymer-modified cement (powdered PMC), and we further look into the engineering properties of powdered PMC on fresh-mixed and hardened mortar. We have also added several superplasticizer for observing their effects on polymer.
The test results of setting time on fresh-mixed mortar show that the application of powdered polymer and promoter has a 30 to 60 minute retarding effect, and at the same time it increases the flowability of fresh-mixed mortar, especially the long-period flowability (90 ~ 120 minutes) which is by 5 ~ 10%. Also, under some testing conditions, the polymer improves the flexural and compressive strength of hardened mortar. Furthermore, the absorption and sorptive expansion ratio can be improved when the polymer be added. As for the usage of superplasticizer for the control of initial flow, the different types and quantities of superplasticizer have different effect of powdered polymer on cement mortar.

關鍵字(中)

★ 強塑劑
★ 強度
★ 流度
★ 粉體聚合物

關鍵字(英)

★ flow
★ powdered polymer
★ superplasticizer
★ strength

論文目次

摘要 II
Abstract III
誌謝 IV
目錄 VI
圖目錄 VIII
表目錄 VIII
第一章緒論 1
1.1 研究動機 1
1.2 研究方法與目的 2
第二章文獻回顧 3
2.1 聚合物水泥複合材料發展史簡述 3
2.2 複合機構的形成與模型 4
2.3 聚合物水泥複合材料種類 5
2.4 新拌混凝土的性質 8
2.4.1 水化速率 9
2.4.2 凝結時間 9
2.4.3 工作性 10
2.4.4 拌合水量 12
2.5 硬固混凝土的性質 12
2.5.1 強度 12
2.5.2 體積穩定性 15
第三章試驗材料及研究方法 16
3.1 試驗材料 16
3.2 試驗設備 18
3.3 試驗規劃 24
3.3.1 研究範圍 24
3.3.2 試驗內容 24
3.4 試驗方法 26
第四章試驗結果與分析 36
4.1 粉體篩選 36
4.2 新拌水泥砂漿 38
4.2.1 凝結時間 38
4.2.2 流度值 40
4.3 硬固水泥砂漿 46
4.3.1 強度 46
4.3.2 體積變化 86
4.3.3 吸水率 91
第五章結論與建議 94
5.1 結論 94
5.2 建議 95
參考文獻 97

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指導教授

李釗(Chau Lee)

審核日期

2007-1-13

推文