Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Early Hydration Properties of BFS by a Change of pH

pH 변화에 따른 고로수쇄 BFS의 초기 수화 특성

  • Kang, Hyun Ju (Reasearch Institute of Chemical Engineering, Kangwon National University) ;
  • Lee, Woong Geol (Reasearch Institute of Chemical Engineering, Kangwon National University) ;
  • Song, Myong Shin (Reasearch Institute of Chemical Engineering, Kangwon National University) ;
  • Kang, Seung Min (Department of Advenced Materials Engineering, Kangwon National University) ;
  • Kim, Kyeng Nam (Department of Advenced Materials Engineering, Kangwon National University)
  • 강현주 (강원대학교 삼척캠퍼스 화학공학연구소) ;
  • 이웅걸 (강원대학교 삼척캠퍼스 화학공학연구소) ;
  • 송명신 (강원대학교 삼척캠퍼스 화학공학연구소) ;
  • 강승민 (강원대학교 삼척캠퍼스 신소재공학과) ;
  • 김경남 (강원대학교 삼척캠퍼스 신소재공학과)
  • Received : 2012.08.08
  • Accepted : 2012.09.24
  • Published : 2012.09.30
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Abstract

This study investigated on the early hydration and physical characteristics of BFS by pH variation. NaOH solution was used as a pH activator. In the range from pH 12 to pH 14, Experiment was compared the hydration propertied of OPC(Ordinary Portland Cement) and BFS(Blast Furnace BFS) and BFS containing 2 wt% of gypsum. It was found that CAH(Calcium Aluminate Hydrates) phases and CSH(Calcium Silicate Hydrates) phases were formed during the early hydration of BFS, and that CAH phases, CSH phases and ettringites were formed during the early hydration of BFS containing 2 wt% of gypsum. Furthermore, early hydration of BFS and BFS containing 2 wt% of gypsum were faster then OPC at pH 14, and the 1 day compressive strength of BFS increased by approximately 30% compared to OPC, and BFS containing 2 wt% of gypsum also increased by approximately 40% compared to OPC.

Keywords

References

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