飛灰及底灰混凝土碳養護對抗壓強度及耐久性之研究

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游正宇(Chen-Yu Yo) 查詢紙本館藏

畢業系所

土木工程學系

論文名稱

飛灰及底灰混凝土碳養護對抗壓強度及耐久性之研究
(Study on compressive strength and durability of fly ash and bottom ash concrete with CO2 curing)

相關論文

★ 混凝土碳養護尺寸效應與耐久性之研究

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至系統瀏覽論文 (2027-8-18以後開放)

摘要(中)

隨著工業化的發展，對於碳排放議題逐漸重視，推動二氧化碳封存，以及減少水泥用量，成為關注議題，本研究透過CO2養護飛灰及底灰混凝土，探討經過碳養護後試體之變化。試驗中規劃製作Ф5*10cm、Ф10*20cm、Ф15*30cm及大尺寸40*40*40cm立方試體，進行抗壓強度試驗、中性化試驗、吸水率試驗、氯離子滲透試驗及SEM試驗。
結果顯示，CO2養護對飛灰及底灰混凝土早期強度影響甚大，早期強度可提升達30%，直至中晚期強度仍可提升10%，並且藉由反應所生成之碳酸鈣，改善混凝土的孔隙結構，影響混凝土之耐久性。混凝土經過碳養護可以降低15%氯離子電滲量，以及降低混凝40% 吸水率。試驗中說明適當添加飛灰及底灰並不會降低抗壓強度，甚至可以有效改善混凝土滲透性以及降低氯離子侵蝕。
中性化試驗證明飛灰及底灰混凝土，在CO2養護後有中性化反應，中性化深度最高達1.45 mm，同時藉由SEM試驗驗證，混凝土在碳化反應過程生成之碳酸鈣，能夠改變孔隙結構。
關鍵字: 二氧化碳養護、抗壓強度、尺寸效應、中性化、氯離子滲
透、吸水率試驗

摘要(英)

With the development of industrialization, more and more attention has been paid to the issue of carbon emissions.
This study uses CO2 curing of fly ash and bottom ash concrete to explore the changes in the specimens after CO2 curing.
In the test, Ф5*10cm, Ф10*20cm, Ф15*30cm, and large-sized 40*40*40cm cubic specimens are planned to be produced, and the compressive strength test, neutralization test, water absorption test, chloride ion penetration test, and SEM test are carried out.
CO2 curing has a great influence on the early strength of concrete, the early strength can be increased by 30%, and it still is increased by 10% until the late stages.
The calcium carbonate generated by the reaction can improve the pore structure of concrete and affect durability.
CO2 curing of concrete can reduce chloride ion penetration by 15%, and reduce concrete water absorption by 40%.
The neutralization test proves that the concrete has a neutralization reaction after CO2 curing, the neutralization depth is up to 1.45 mm. And the SEM test result verifies that the calcium carbonate generated in the carbon reaction process of concrete can change the pore structure.

Keywords: CO2 Curing, Compressive Strength, Size Effect, Neutralization, Chloride ion Penetration, Water Absorption Test

關鍵字(中)

★ 二氧化碳養護
★ 抗壓強度
★ 尺寸效應
★ 中性化
★ 氯離子滲透
★ 吸水率試驗

關鍵字(英)

★ CO2 Curing
★ Compressive Strength
★ Size Effect
★ Neutralization
★ Chloride ion Penetration
★ Water Absorption Test

論文目次

摘要..................................................... i
Abstract................................................. ii
目錄..................................................... iv
圖目錄..................................................viii
表目錄..................................................xiii
第 1 章緒論..............................................1
1.1 研究動機..............................................1
1.2 研究目的..............................................2
2 章文獻回顧.............................................3
2.1 卜作嵐材料-飛灰.......................................3
2.1.1 飛灰的介紹........................................3
2.1.2 飛灰的組成........................................4
2.1.3 飛灰混凝土之耐久性................................5
2.2 卜作嵐材料-底灰................... ...................9
2.2.1 底灰的介紹........................................9
2.2.2 底灰混凝土之物理性質.............................10
2.3 二氧化碳加速養護.....................................15
v
2.3.1 二氧化碳加速養護介紹.............................15
2.3.2 二氧化碳養護之抗壓強度影響.......................17
2.3.3 二氧化碳養護之滲透性影響.........................24
2.3.4 二氧化碳養護之氯離子滲透影響.....................30
2.3.5 SEM 電子顯微鏡...................................36
2.3.6 二氧化碳養護隨後飽和石灰水養護...................38
2.3.7 小結.............................................41
第 3 章試驗規劃與實驗介紹...............................42
3.1 試驗規劃與製作.......................................43
3.2 試體配比及編號.......................................47
3.2.1 試驗配比.........................................47
3.2.2 試驗編號 ........................................48
3.3 試驗材料及儀器.......................................49
3.3.1 試驗材料.........................................49
3.3.2 試驗設備.........................................54
3.4 試驗介紹.............................................58
3.4.1 抗壓強度試驗.....................................58
3.4.2 混凝土圓柱試體尺寸效應試驗.......................59
3.4.3 混凝土鑽心取樣...................................60
vi
3.4.4 中性化試驗.......................................62
3.4.5 混凝土吸水試驗...................................63
3.4.6 快速氯離子滲透試驗...............................64
第 4 章試驗結果討論.....................................68
4.1 混凝土添加飛灰或底灰碳養護圓柱試體抗壓強度之影響.....68
4.1.1 高強度圓柱試體之抗壓強度.........................69
4.1.2 低強度圓柱試體之抗壓強度.........................72
4.2 圓柱試體抗壓強度尺寸效應之影響.......................76
4.2.1 圓柱試體之尺寸效應之影響.........................76
4.2.2 碳養護尺寸效應之影響.............................80
4.3 混凝土添加飛灰及底灰碳養護大尺寸立方鑽心試體抗壓強度之影響..................................................83
4.4 混凝土添加飛灰及底灰碳養護對中性化之影響.............87
4.4.1 中性化深度預測...................................87
4.4.2 飛灰及底灰混凝土中性化影響探討...................89
4.4.3 中性化影響之探討.................................90
4.5 混凝土添加飛灰及底灰碳養護對氯離子滲透之影響.........93
4.5.1 快速氯離子滲透試驗...............................93
4.5.2 飛灰及底灰取代率對氯離子滲透性之影響.............93
4.5.3 水膠比對氯離子滲透性之影響.......................94
4.5.4 碳養護對氯離子滲透性之影響.......................95
4.6 混凝土添加飛灰及底灰碳養護對吸水率之影響.............98
4.6.1 混凝土滲透性影響.................................98
4.6.2 飛灰及底灰取代水泥對混凝土吸水率之影響...........98
4.6.3 水膠比對混凝土吸水率之影響.......................99
4.6.4 碳養護對混凝土吸水率之影響......................100
4.7 掃描式電子顯微鏡試驗(SEM) ..........................103
4.7.1 SEM 試驗分析....................................103
4.7.2 SEM 試驗結果分析................................104
第 5 章結論與建議......................................108
5.1 結論................................................108
5.2 建議................................................110
參考文獻................................................112
附錄....................................................117

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指導教授

王勇智李明君(Yung-Chih Wang Min-Gin Lee)

審核日期

2022-8-25

推文