臺灣博碩士論文加值系統

本研究係以矽酸鈉及氫氧化鈉溶液為鹼性激發劑，經試拌後決定於固定液固比為0.5，藉由改變鹼激發量、矽鈉比及水淬爐石粉與飛灰混合比，以探討各參數對於鹼激發爐灰混凝土新拌、物理性質、耐久性及微觀性質之影響。
研究結果顯示：(1)新拌性質方面，鹼激發爐灰混凝土坍度在220 mm至270 mm之間；坍流度在360 mm至600 mm之間；初凝與終凝時間分別為529~684分鐘與556~745分鐘之間，增加鹼激發量對於工作性及凝結時間並無明顯變化。(2)鹼激發爐灰混凝土含氣量在0.3~2.8%之間，增加鹼激發量與矽鈉比，含氣量皆會下降。(3)鹼激發爐灰混凝土28天齡期抗壓強度在21.43~48.03 MPa之間，增加溶液鹼濃度可提升材料強度，但因飛灰為惰性材料使得飛灰組別強度皆低於純水淬爐石粉組別，50%飛灰混合降低28天抗壓強度13.1~38.3%之間。(4)全試驗組鹼激發爐灰混凝土熱傳導係數範圍在1.227~1.854 w/m·k之間，低於一般傳統混凝土約18.2~47%，顯示鹼激發爐灰混凝土具良好隔熱性能，且粉體種類對於材料熱傳導係數值之影響性大於溶液配比因子。(5)鹼激發爐灰混凝土長度變化量結果顯示，鹼溶液參數中矽鈉比與鹼激發量增加皆會提高材料長度變化量。(6)鹼激發爐灰混凝土表面電阻率結果顯示，矽鈉比與鹼激發量增加皆會提高混凝土表面電阻率。(7) 鹼激發爐灰混凝土吸水率結果顯示，矽鈉比與鹼激發量增加皆會降低混凝土吸水率，吸水率愈大則混凝土內部孔隙愈多。

In this study, the sodium silicate and sodium hydroxide were used as the alkali activator. After trial mixes, the liguid-solid ratio was fixed as 0.5, and the experimental parameters including different dosages of activator, silicon-sodium ratio and proportions of slag-fly ash mixtures were used to investigate the effects of various combinations of parameters on the fresh, physical, durable and microstructural properties of the alkali-activated concrete with slag and fly ash.
The research results show that: (1) For the fresh properties, the slump of alkali-activated slag-fly ash concrete were in the range from 220 to 270 mm, and the slump flow were in the range from 360 to 600 mm, and the initial and finial setting times of concrete were from 529 to 684 and 556 to 745 min, respectively. Increase of dosages of activator could not significantly change the workability and setting times. (2) The air content of alkali-activated slag-fly ash concrete was in the range from 0.3 to 2.8 %. Increase of dosages of activator and silicon-sodium ratio could decrease the air content. (3) The increase of dosages of activator could enhance the material strength such that the compressive strength of all mixture at 28 days were in the range from 21.43 to 48.03 MPa. However, when the slag powder mixed with fly ash being the inert ingrident, the concrete had lower compressive strength at 28 days by a decreaseof 13.1 to 38.3% if the amount of fly ash replacement replaced 50 wt. % of slag. (4) The thermal conductivities of all mixtures were in range from 1.227 to 1.854 w/m•k, which were lower than these of normal concrete by 18.2 to 47 %, that in turn showed that thealkali-activated slag-fly ash concrete had much better insulation properties. In addition, the properties of thermal conductivity were primarily controlled by composition of powder material rather than by the mixing liquid. (5) The increase of dosages of activator and and silicon-sodium ratio could increase the drying shrinkage of alkali-activated slag-fly ash concrete. (6) The increase of dosages of activator and and silicon-sodium ratio could increase the surface resistivity of alkali-activated slag-fly ash concrete. (7) The increase of dosages of activator and and silicon-sodium ratio could reduce the water absorption of alkali-activated slag-fly ash concrete. The higher the water absorption is, the higher the internal voids of concrete will be.

摘要
Abstract
致謝
總目錄
表目錄
圖目錄
第一章 緒論
1-1 研究動機
1-2 研究目的
1-3 研究內容與流程
第二章 文獻回顧
2-1 前言
2-2 鹼激發材料源起
2-3 鹼激發基礎材料
2-3-1 水淬爐石粉
2-3-2 飛灰
2-4 鹼激發水淬爐石粉反應機制
2-4-1 水化反應影響因子
2-4-2 水化反應機制與水化反應物
2-4-3 鈣與鋁元素之影響
2-5 鹼激發材料配比因子
2-5-1 鹼激發溶液
2-5-2 鹼激發溶液濃度
2-5-3 混合鹼激發溶液影響
2-5-4 水淬爐石粉-飛灰混合型鹼激發材料
2-6 鹼激發材料流動性
第三章 試驗計畫與流程
3-1 試驗內容與流程
3-2 試驗材料
3-3 試驗變數與項目
3-3-1 試驗內容範圍
3-3-2 試驗變數與項目
3-4 試驗拌合說明
3-5 試驗方法
3-5-1 粒料基本性質試驗
3-5-2 新拌性質試驗
3-5-3 物理性質試驗
3-5-4 耐久性試驗
3-5-5 微觀分析試驗
3-6 試驗儀器與設備
3-6-1 粒料基本性質儀器
3-6-2 新拌試驗儀器
3-6-3 物理性質試驗儀器
3-6-4 耐久性試驗儀器
3-6-5 微觀試驗儀器
第四章 鹼激發爐灰混凝土試驗結果與分析
4-1 混凝土新拌性質
4-1-1坍度
4-1-2坍流度
4-1-3凝結時間
4-1-4含氣量
4-2鹼激發爐灰混凝土物理性質
4-2-1抗壓強度
4-2-2超音波速
4-2-3動態彈性模數
4-2-4熱傳導係數
4-3鹼激發爐灰混凝土耐久性質
4-3-1長度變化量
4-3-2表面電阻率
4-3-3吸水率
4-4鹼激發爐灰混凝土微觀性質
4-4-1 掃描式電子顯微鏡 (SEM)
4-1-2 元素分析 (EDS)
第五章 結論與建議
5-1結論
5-2建議
參考文獻

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