Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Influence of Nano Silica Dispersant on Hydration Properties of Cementitious Materials

시멘트의 수화특성에 대한 유·무기 복합 나노실리카의 영향

  • Kang, Hyun-Ju (Reasearch Institute of Chemical Engineering, Kangwon National University) ;
  • Song, Myong-Shin (Reasearch Institute of Chemical Engineering, Kangwon National University) ;
  • Park, Jong-Hun (Department of Chemical Engineering Kangwon National University) ;
  • Song, Su-Jae (Wintec Glovis Co., Ltd.)
  • 강현주 (강원대학교 화학공학연구소) ;
  • 송명신 (강원대학교 화학공학연구소) ;
  • 박종헌 (강원대학교 삼척캠퍼스 화학공학과) ;
  • 송수재 ((주)윈텍글로비스)
  • Received : 2011.10.10
  • Accepted : 2011.11.28
  • Published : 2011.11.30
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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.

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References

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