博碩士論文 100322043 完整後設資料紀錄

DC 欄位	值	語言
DC.contributor	土木工程學系	zh_TW
DC.creator	張哲維	zh_TW
DC.creator	Che-Wei Chang	en_US
dc.date.accessioned	2014-7-29T07:39:07Z
dc.date.available	2014-7-29T07:39:07Z
dc.date.issued	2014
dc.identifier.uri	http://ir.lib.ncu.edu.tw:444/thesis/view_etd.asp?URN=100322043
dc.contributor.department	土木工程學系	zh_TW
DC.description	國立中央大學	zh_TW
DC.description	National Central University	en_US
dc.description.abstract	摘要 　　國內低放射性廢棄物將進行最終處置，故處置場工程障壁設施的耐久性就顯得非常重要。低放射性廢棄物最終處置場處置窖主體由混凝土構成，台灣在四面環海情形下，處置場可能遭受外在環境多種因素的侵蝕。因此處置場障壁在此服務環境下，可能對混凝土造成損傷或劣化甚至影響其耐久性。 　　本研究針對低放射性廢棄物最終處置場可能使用之混凝土材料，以實驗室模擬其受硫酸鹽侵蝕下，探討混凝土材料長期在此環境之行為分析其耐久性之影響。利用費克第二定律的衍伸式得知在硫酸鹽侵襲下混凝土材料的擴散係數。並應用於反應動力方程式來計算其內部的應力、應變情形，再計算其剝落臨界值。後可得其劣化深度、劣化時間及劣化速率。若以台東地下水的硫酸鹽濃度來推估，結果顯示高完整性容器HIC配比較傳統配合設計ACI配比能夠抵抗硫酸鹽侵蝕。	zh_TW
dc.description.abstract	Abstract The final disposal of low-level radioactive waste calls for engineered barriers for containment of the waste. Since concrete is a major component of the engineered barriers, the durability of concrete under adverse environment is of great importance for safety disposal of the wastes. This study aims at studying the durability of concrete, attacked by sulphate ions in the laboratory. The diffusion coefficient of concrete under sulphate attack was determined from laboratory specimens immersed in sulphate solution for varying period of time. Then the reaction kinetics of sulphate in concrete material was adopted to calculate the internal stress, strain, such that the time and depth of spalling can be estimated. Finally, the degradation rate of concrete with for different mixes can be determined. It was found that the concrete designed for the highly integrated containers exhibits improved ability in resisting sulphate attack than traditional concrete mixes.	en_US
DC.subject	硫酸鹽侵蝕	zh_TW
DC.subject	擴散係數	zh_TW
DC.subject	反應動力學	zh_TW
DC.title	工程障壁混凝土受硫酸鹽侵襲之劣化行為及速率推估	zh_TW
dc.language.iso	zh-TW	zh-TW
DC.type	博碩士論文	zh_TW
DC.type	thesis	en_US
DC.publisher	National Central University	en_US