臺灣博碩士論文加值系統

本研究主要旨在探討碳化對鋼筋混凝土結構物劣化之影響，其中包括評估影響混凝土中性化速率的因素及中性化後各項性質的改變。試驗研究採加速中性化法來瞭解溫濕度及組成材料，對中性化速率之影響，並以中性化後的混凝土試體進行中性化深度、化學性質、物理性質、力學性質、電化學等試驗。
研究結果顯示，在相對濕度90%、70%、55%，水膠比0.62，飛灰取代量0%、10%、20%的條件下之混凝土試體，相對濕度越低、飛灰取代量越高者則其中性化深度越深、中性化速率越快。
混凝土中性化後其抗壓強度、劈裂強度皆提高，而中性化後之混凝土的吸水率、電滲量隨著飛灰取代量的增加而減少，另外，氧氣之氣體滲透係數卻隨著飛灰取代量的增加而增加。但隨著碳化時間的增加，鋼筋混凝土的腐蝕速率提高。而鋼筋的腐蝕速率隨著飛灰取代量的增加而減小。

中文摘要 i
英文摘要 ii
目錄 iii
表目錄 v
圖目錄 vi
第一章 緒論...................................................1
1.1 研究動機...................................................1
1.2 研究目的...................................................2
1.3 研究的範圍.................................................3
1.4 研究的方法與流程...........................................3
第二章 文獻回顧...............................................5
2.1 混凝土之耐久性 .............................................5
2.2 水泥水化作用與飛灰波索蘭反應................................6
2.3 混凝土中性化的機理..........................................7
2.4 波索蘭反應對中性化之影響....................................8
2.5 混凝土中性化之性質差異......................................9
2.5.1 物理、化學性質...........................................9
2.5.2 力學性質................................................10
2.5.3 電化學性質..............................................10
2.6 混凝土中性化之量測方法.....................................13
2.7 混凝土中性化之影響因子.....................................14
第三章 實驗計畫..............................................18
3.1 實驗變數..................................................18
3.2 試驗材料與配比............................................21
3.3 試驗設備..................................................25
3.4 試驗方法..................................................33
第四章 結果與分析.............................................44
4.1 前言......................................................44
4.2 中性化深度................................................44
4.3 化學性質..................................................55
4.3.1 試片pH值量測...........................................55
4.4 物理性質..................................................60
4.4.1 吸水率試驗..............................................60
4.4.2 吸水速率試驗 ............................................62
4.4.3 氧氣之氣體滲透係數.......................................64
4.5 力學性質..................................................67
4.5.1抗壓強度.................................................67
4.5.2 劈裂強度................................................69
4.6 電化學試驗................................................72
4.6.1 快速氯離子滲透試驗.......................................72
4.6.2 鋼筋腐蝕試驗............................................74
第五章 結論與建議.............................................82
5.1 結論......................................................82
5.2 建議......................................................84
參考文獻 .....................................................85

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