Chemical-mechanical characteristics of crushed oyster-shell |
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Authors: | Yoon Gil-Lim Kim Byung-Tak Kim Baeck-Oon Han Sang-Hun |
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Institution: | Coastal & Harbor Engineering Research Division, Korea Ocean Research & Development Institute, 1270 Sadong, Ansan City, 425-744, South Korea. glyoon@kordi.re.kr |
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Abstract: | Enormous amount of oyster-shell waste has been illegally disposed at oyster farm sites along the southern coast of Korea. To seek for a possibility to recycle the waste as construction materials, chemical and mechanical characteristics of crushed oyster-shell were investigated. Chemical and microstructure analyses showed that oyster-shells are predominantly composed of calcium carbonate with rare impurities. Compressive strength tests for soil mortar specimens with varying blending ratio of cement, water, sand, and oyster-shell were compared with normal cement mortar. There was no significant reduction in the compressive strength up to 40% of dosages of oyster-shell instead of sand. The experimental results demonstrate that oyster-shells can be resources of pure calcareous materials and effective in replacement of sand, indicating promising reusable construction materials. |
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