Durability analysis on reactive powder concrete as barrier materials for low-level radioactive waste disposal

Mei Ling Chuang, Wei Hsing Huang

研究成果: 書貢獻/報告類型會議論文篇章同行評審

摘要

Reactive powder concrete (RPC) has been proposed as barrier materials for the construction of engineered barrier in a low-level radioactive waste disposal site. The durability characteristics of RPC in such applications become paramount for the success of the containment of the wastes. The adverse environmental conditions at the disposal site could attack concrete barrier material and result in degradation of the material. Laboratory tests were conducted on RPC with various compositions to investigate the physical and durability properties of RPC. The effects of the addition of cement, silica fume, quartz powder, silica sand, steel fiber, and 2 levels of water-to-binder ratio (W/B = 0.25 and 0.30) on the properties of RPC specimens were investigated. Experimental results indicate that the long-term durability of RPC is significantly improved with the hydration of pozzolanic materials, which produces a very dense structure and thus exhibiting improved durability. The coefficient of permeability of RPC matrix determined using gas permeability apparatus demonstrated that RPC has much lower permeability than that of ordinary concrete. Heat-treating of concrete at 80°C accelerates the hydration process of RPC and shows enhanced physical and durable characteristics, as demonstrated by the chloride penetration test results.

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主出版物標題Innovation for Applied Science and Technology
頁面1295-1299
頁數5
DOIs
出版狀態已出版 - 2013
事件2nd International Conference on Engineering and Technology Innovation 2012, ICETI 2012 - Kaohsiung, Taiwan
持續時間: 2 11月 20126 11月 2012

出版系列

名字Applied Mechanics and Materials
284-287
ISSN(列印)1660-9336
ISSN(電子)1662-7482

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???event.eventtypes.event.conference???2nd International Conference on Engineering and Technology Innovation 2012, ICETI 2012
國家/地區Taiwan
城市Kaohsiung
期間2/11/126/11/12

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