Synthesis of High-Performance Polycarboxylate(PC)-Type Superplasticizer, and Its Fluidity and Hydration Behavior in Cement Based-System

폴리카복실레이트계 고성능 유동화제의 합성과 시멘트계 내의 유동 및 수화 반응 거동

  • 신진용 (한국화학연구원 신화학연구단) ;
  • 채은진 (한국화학연구원 신화학연구단) ;
  • 홍지숙 (한국화학연구원 신화학연구단) ;
  • 서정권 (한국화학연구원 신화학연구단) ;
  • 황의환 (공주대학교 화학공학부)
  • Published : 2006.05.11

Abstract

Graft copolymerized polycarboxylate(PC)-type superplasticizers(PCs) which have carboxylic acid with $\pi$ bond among the molecular structure and polyethyleneglycol methyl ether methacrylate(PMEM) were synthesized by free radical reaction and investigated the chemical structure, polymerization condition, and physical and chemical properties. Also, the effects of PCs in the dispersion, adsorption and hydration of cement were evaluated. As the molecular weight of graft chain decreases, the adsorption amount on cement particles increased. It was advantageous for the flow to reduce molar ratio, the lower the side bone molecular weight, and increase the molar ratio, the larger the side bone molecular weight. The hydration reaction speed was highly delayed at day 1, due to increase in molar ratio and reduction in side bone molecular weight, but it was recovered in the days after.

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