Effects of Carbon Content and Fineness of Fly Ash on Properties of Concrete

플라이애쉬의 미연탄소량 및 분말도가 콘크리트의 성질에 미치는 영향

  • 김훈 (동양중앙연구소 건설재료연구실) ;
  • 박연동 (동양중앙연구소 건설재료연구실) ;
  • 손명수 (동양중앙연구소 건설재료연구실) ;
  • 김호영 (동양중앙연구소 건설재료연구실) ;
  • 이복기 (동야시멘트(주) 고객지원부)
  • Published : 1997.10.01

Abstract

In this study, effects of carbon content and fineness of fly-ash on the workability an the strength development of concrete and investigated experimentally. Carbon content with 6 levels (0, 2, 3, 4, 5, 7%) and fineness with 3 levels (4, 000, 5, 000, 6, 000 $\textrm{cm}^2$/g) are selected for test variables. Besides, the effect of fly-ash with variation of initial concrete temperature is tested. To measure slump and air losses, small laboratory agitator is used. As the results, the used AE admixture content to maintain constant initial air content is increased linearly with increasing carbon content in fly-ash. With increasing fineness of fly-ash, the strengths at 3 and 7 days are slightly increased, however, there is no clear difference among 28 day strengths within the scope of this study.

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