Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Influence of Water Glass on Strength of Fly Ash-Cements

플라이 애쉬-시멘트의 강도특성에 대한 물유리의 영향

  • Park, Sang-Sook (Division of Civil and Environmental. Engineering, Sunchon National University) ;
  • Kang, Hwa-Young (Department of Civil and Environment, Hanyeong Technical College) ;
  • Han, Sang-Ho (Division of Civil and Environmental. Engineering, Sunchon National University) ;
  • Rim, Yu-Sup (Department of Bio-environmentla Chemistry, Sunchon National University) ;
  • Kim, Dong-Kuk (Division of Civil and Environmental. Engineering, Sunchon National University) ;
  • Kim, Se-Hoon (Division of Environmental and Chemical Engineering, Chonbuk National University)
  • 박상숙 (순천대학교 토목.환경공학부) ;
  • 강화영 (한영대학 토목환경과) ;
  • 한상호 (순천대학교 토목.환경공학부) ;
  • 임요섭 (순천대학교 생물환경화학과) ;
  • 김동국 (순천대학교 토목.환경공학부) ;
  • 김세훈 (전북대학교 환경.화학공학부)
  • Published : 2006.06.30
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Abstract

The compressive strength of a paste composed of a low-calcium Class F fly ash and alkaline activator solutions was investigated. These activator solutions, made with sodium hydroxide, water glass and water, have a very high $OH^-$ concentration. The composition of alkaline activator solution and temperature have been shown to notably influence the development of the compressive strength of the fly ash-cements paste. Compressive strength of 50 MPa could be achieved by curing of the fly ash at $60^{\circ}C$ for 48 hrs or $85^{\circ}C$ for 24 hrs. This study presented the optimum mixing ratio of Class F fly ash/sodium hydroxide/water glass as 25:8:2 in weight basis, and activator/fly ash as 0.6/1.0 for high strength paste.

칼슘함량이 낮은 F급 플라이 애쉬와 알칼리 활성화 용액으로 구성된 페이스트의 압축강도 특성에 대한 연구를 수행하였다. 수산화나트륨과 물유리 그리고 물을 혼합하여 제조한 이들 활성화 용액은 매우 높은 $OH^-$ 농도를 가지고 있다. 알칼리 활성화 용액의 조성과 온도는 플라이 애쉬-시멘트 페이스트의 압축강도 발현에 대한 현저한 영향 인자임을 보여주었다. 50 MPa 이상의 압축강도는 플라이 애쉬를 각각 $60^{\circ}C$에서 48시간과 $85^{\circ}C$에서 24시간 양생하여 얻었다. 본 연구결과, F급 플라이 애쉬/NaOH/물유리의 무게 비율 25:8:2와 활성화 용액/플라이 애쉬의 무게 비율 0.6/1.0은 높은 강도를 가진 페이스트를 위한 적정 혼합비율로 나타났다.

Keywords

References

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