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J. Korean Ceram. Soc. > Volume 47(3); 2010 > Article
Journal of the Korean Ceramic Society 2010;47(3): 216.
doi: https://doi.org/10.4191/kcers.2010.47.3.216
알루미노 실리케이트계 지오폴리머의 압축강도에 미치는 알카리 활성화제의 영향
김진태, 서동석, 김갑중1, 이종국
조선대학교 신소재공학과
1(주)에코닉스
Influence of Alkaline-activator Content on the Compressive Strength of Aluminosilicate-based Geopolymer
Jin-Tae Kim, Dong-Seok Seo, Gab-Joong Kim1, Jong-Kook Lee
Department of Advanced Materials Engineering, Chosun University
1ECONIX Co., Ltd.
ABSTRACT
Portland cement has been restricted in applications to ecological area because of its environmental harmfulness and the $CO_2$ emission during a production process. Geopolymer materials attract some attention as an inorganic binder due to their superior mechanical and eco-friendly properties. In this study, geopolymer-based cement was prepared by using aluminosilicate minerals (flyash, meta-kaolin) with alkaline-activators and its compressive strength with concentration of alkaline-activators was investigated. Aluminosilicate-based geopolymers were obtained by mixing aluminosilicate minerals, alkaline solution (NaOH or KOH with different concentration) and water-glass under the vigorous stirring for 20 min. Compressive strength after curing at $30^{circ}C$ for 3 days increased with the concentration of alkaline-activator due to the enhanced polymerization of the aluminosilicate materials and dense microstructure. Aluminosilicate-based geopolymer cement using KOH as an alkaline-activator showed high compressive strength compared with NaOH activator. In addition, geopolymer cement using fly-ash as a raw material showed higher compressive strength than that of meta-kaolin.
Key words: Geopolymer cement, Aluminasilicate, Fly-ash, Meta-kaolin, Alkaline-activator
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