碩士 / 義守大學 / 土木與生態工程學系 / 107 / Sand is an important bulk material for construction, and sea sand is a possible source. However, unlike many other countries allowing use of washed (de-chloride) sea sand, Taiwan still prohibits sea sand applications in construction. Three worries are associated with the chloride contents in sea sand: expediting rebar corrosion, decreased long-term concrete strength, and increased efflorescence formation. While the problems of rebar corrosion and decreased long-term concrete strength have been thoroughly investigated, there is a lack of research efforts on the formation of efflorescence with sea sand concrete. This research therefore aims at comparing the efflorescence occurrence on unwashed sea sand concrete, washed sea sand concrete, and normal concrete. Our experiments have shown that the main cause of efflorescence occurrence is the environment that promotes the water penetration within concrete, while chloride contents do not play a noticeable role. However, the occurrence of efflorescence does have negative impact on the concrete strength.
| Identifer | oai:union.ndltd.org:TW/107ISU05731002 |
| Date | January 2019 |
| Creators | Shih-Tse Lin, 林世澤 |
| Contributors | Kuo-Liang Lin, 林國良 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 64 |
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