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http://dx.doi.org/10.4334/JKCI.2009.21.1.003

Decision of Optimized Mix Design for Lightweight Foamed Concrete Using Bottom Ash by Statistical Procedure  

Kim, Jin-Man (Dept. of Architecture, Kongju National University)
Kwak, Eun-Gu (Dept. of Architecture, Kongju National University)
Cho, Sung-Hyun (Central Research Center of Hanil Cement Company Ltd.)
Kang, Cheol (Dept. of Architecture, Kongju National University)
Publication Information
Journal of the Korea Concrete Institute / v.21, no.1, 2009 , pp. 3-11 More about this Journal
Abstract
The increased demand and consumption of coal has intensified problems associated with disposal of solid waste generated in utilization of coal. Major utilization of coal by-products has been in construction-related applications. Since fly ash accounts for the part of the production of utility waste, the majority of scientific investigations have focused on its utilization in a multitude of use, while little attention has been directed to the use of bottom ash. As a consequence of this neglect, a large amount of bottom ash has been stockpiled. However, the need to obtain safe and economical solution for its proper utilization has been more urgent. The study presented herein is designed to ascertain the performance characteristics of bottom ash, as autoclaved lightweight foamed concrete product. The laboratory test results indicated that tobermorite was generated when bottom ash was used as materials for hydro-thermal reaction. According to the analysis of variance, at the fresh state, water ratio affects on flow and slurry density of autoclaved lightweight foamed concrete, but foam ratio influences on slurry density, while, at the hardened state, foam ratio affects on the density of dry and the compressive strength but doesn't affect on flexural and tensile strength. In the results of response surface analysis, to obtain target performance, the most suitable mix condition for lightweight foamed concrete using bottom ash was water ratio of 70$\sim$80% and foaming ratio of 90$\sim$100%.
Keywords
bottom ash; autoclave; lightweight foamed concrete; statistical analysis;
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  • Reference
1 Taylor, H. F. W., The Chemistry of Cements, Vol. 1, Academic Press, London and New York, 1964, pp. 186-190
2 光田 式, “¾水熱反とケイ酸カルツウム工業,”セラミクス, Vol. 15, No. 3, 1990, pp. 184-196.
3 恒松修二, 井上憲弘, 原 尙道, “¾フライツシコと石灰, セツコウとの水熱反應性,”Gypsum & Lime, No. 211, 1987, pp. 12-18.
4 Tada, M., “Autoclaved Lightweight Concrete,”Gypsum & Lime, No. 222, 1989, pp. 27-34
5 Sudo, N. and Akiba, T., Introduction to Cement Chemistry, Japan Cement Industry Association, 1991, pp. 15-20
6 산업자원부, 비정제 석탄회를 이용한 소음저감재 개발, 산업자원부, 2005, pp. 179~272
7 오세출, 서치호, 지석원, “플라이애쉬를 혼입한 기포콘크리트의 압축강도 특성에 관한 실험적 연구,”대한건축학회논문집, 19권, 4호, 2003, pp. 125-129
8 손양훈, 전력산업의 장기한계비용-장기전력수급계획에 기초하여, 에너지경제연구원, 1992, pp. 5-11.
9 Zhang, Q., Li, Z. L., and Wang, H., “A Study on the Beneficiation and Application of Fly Ash from Power Plants,”XVIII International Mineral Processing Congress, Sydney, 1993, pp. 1447-1452
10 光田 式, “ºオ一トクレ一ブ 處理ケイ酸カルツウム材料,”~セラミクス, Vol. 12, No. 8, 1988, pp.748-752.
11 오성원, “석탄회처리 현황과 대책,”석탄회 활용 국제 워크숍, 1996, pp. 3-16