高韌性纖維混凝土(ECC)之材料配比及添加物對收縮及力學性質影響

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姓名

施閏澶(Jun-Chan Shih) 查詢紙本館藏

畢業系所

土木工程學系

論文名稱

高韌性纖維混凝土(ECC)之材料配比及添加物對收縮及力學性質影響
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摘要(中)

高韌性纖維混凝土(Engineered Cementitious Composites，簡稱ECC)是經由微觀力學設計的水泥基工程複合材料，是在基體中添加聚乙烯醇纖維(polyvinyl alcohol，簡稱PVA)，在拉力和撓曲作用下呈現高延展性，具有應變硬化和多重開裂的特性。
本研究透過比較飛灰含量、纖維含量、膨脹劑含量來探討ECC材料之收縮性質與力學性質之影響，包括乾燥收縮試驗、自體收縮試驗、圓柱壓力試驗、直接拉力試驗和四點彎矩試驗。結果顯示，飛灰含量越多之ECC材料會使乾縮增加而自收縮漸少。而纖維含量越多之ECC材料會使乾縮和自收縮同時增加。在所有添加膨脹劑之配比中，膨脹劑含量0.5%擁有最低之乾縮與自收縮。

摘要(英)

Engineered Cementitious Composites (ECC) is a material using polyvinyl alcohol (PVA) fibers in the matrix. The most important performance characteristic of ECC is that it can exhibit multiple cracks and strain-hardening under tensile and flexural behavior.
In this study, the content of fly ash, PVA fiber and expansive agent are used to investigate ECC’s characteristics. Including drying shrinkage test, autogenous shrinkage test, uniaxial Compressive test, uniaxial tensile test and four points flexural test. The result shows that drying shrinkage increase and autogenous shrinkage decrease while the more content of fly ash in ECC. The more fiber content in ECC cause drying shrinkage and autogenous shrinkage increase. Among all proportions with expansive agent. The specimen adding 0.5% of expansive agent has the lowest drying shrinkage and autogenous shrinkage.

關鍵字(中)

★ 乾縮
★ 自體收縮

關鍵字(英)

論文目次

摘要 i
誌謝 iv
Abstract iii
目錄 iv
圖目錄 ix
表目錄 xi
第一章緒論 1
1.1 研究動機 1
1.2 研究目的 2
1.3 研究方法 2
第二章文獻回顧 3
2.1高韌性纖維混凝土(Engineered Cementitious Composites, ECC) 3
2.2 水泥的收縮變形機制 4
2.2.1塑性收縮(Plastic shrinkage) 5
2.2.2自體收縮(Autogenous shrinkage) 5
2.2.3乾燥收縮(Drying shrinkage) 6
2.3 防範水泥基材料發生裂縫之對策 6
2.3.1使用飛灰當作摻料 7
2.3.2使用纖維當作摻料 11
2.3.3使用膨脹劑當作摻料 14
2.3.4使用爐石粉當作摻料 17
2.3.5其他對收縮性質影響參數 19
第三章實驗規劃及設置 22
3.1 實驗規劃 22
3.2 實驗材料 22
3.3 試體參數及編號 26
3.4 試體製作與養護流程 30
3.4.1 實驗設計流程 30
3.5 試驗內容與方法 35
3.5.1 乾縮試驗與自體收縮試驗 35
3.5.2 圓柱壓力試驗 36
3.5.3 單軸拉力試驗 37
3.5.4 四點彎矩試驗 38
第四章試驗結果與討論 40
4.1飛灰對收縮及力學性質影響 40
4.1.1乾燥收縮試驗 40
4.1.2 自體收縮試驗 41
4.1.3 圓柱壓力試驗 43
4.1.4 直接拉力試驗 46
4.1.5 四點彎矩試驗 50
4.2 纖維對收縮及力學性質影響 52
4.2.1 乾燥收縮試驗 52
4.2.2 自體收縮試驗 54
4.2.3 圓柱壓力試驗 55
4.2.4 直接拉力試驗 58
4.2.5 四點彎矩試驗 62
4.3 膨脹劑對收縮及力學性質影響 64
4.3.1 乾燥收縮試驗 64
4.3.2 自體收縮試驗 66
4.3.3 圓柱壓力試驗 67
4.3.4 直接拉力試驗 70
4.3.5 四點彎矩試驗 74
4.4 不同混凝土對收縮影響 76
4.4.1 不同配比差異之乾縮 76
4.4.2 試體大小差異之乾縮 78
第五章結論與建議 81
參考文獻 85

參考文獻

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指導教授

洪崇展、李顯智

審核日期

2016-8-29

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