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J. Korean Ceram. Soc. > Volume 48(6); 2011 > Article
Journal of the Korean Ceramic Society 2011;48(6): 510.
doi: https://doi.org/10.4191/kcers.2011.48.6.510
시멘트의 수화특성에 대한 유·무기 복합 나노실리카의 영향
강현주, 송명신, 박종헌1, 송수재2
강원대학교 화학공학연구소
1강원대학교 삼척캠퍼스 화학공학과
2(주)윈텍글로비스
Influence of Nano Silica Dispersant on Hydration Properties of Cementitious Materials
Hyun-Ju Kang, Myong-Shin Song, Jong-Hun Park1, Su-Jae Song2
Reasearch Institute of Chemical Engineering, Kangwon National University
1Department of Chemical Engineering Kangwon National University
2Wintec Glovis Co., Ltd.
ABSTRACT
In this study, as a material used to replace silica fumes for high strength concrete, nano-silica compound with organic functional group for dispersion and with inorganic silica group that can cause a pozzolan reaction is synthesized, These nano silica compound is divided into IC, which is nano size $SiO_2$ with irregularly combined hydroxyl group and carboxyl group, and RC, which is nano size $SiO_2$ with regularly combined hydroxyl group and carboxyl group. The effects of these nano silica compound on the hydration of cement are reviewed. As a result, all of synthesized nano-silica compounds have excellent dispersion on the cement flow, we think that dispersion property is the effect of air entraining by synthesized nano-silica compounds. The result of the microstructure observation showed that the particle size of the synthesized nano-silica is smaller than silica fume and spread evenly among the cement particles. In initial The phenomenon of strength decreasing occurred due to delayed hydration reaction by the synthesized nano-silica with carboxyl(-COOH) and hydroxyl(-OH) functional group.
Key words: Nano-silica, Silicafume, Dispersion, Micel
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