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http://dx.doi.org/10.4334/JKCI.2009.21.1.029

An Experimental Study on the Influence of High Fineness Fly Ash and Water-Binder Ratio on Properties of Concrete  

Lee, Sang-Soo (Dept. of Architectural Engineering, Hanbat National University)
Song, Ha-Young (Dept. of Architectural Engineering, Hanbat National University)
Lee, Seung-Min (Dept. of Architectural Engineering, Hanbat National University)
Publication Information
Journal of the Korea Concrete Institute / v.21, no.1, 2009 , pp. 29-35 More about this Journal
Abstract
Recently, the press and institute recognized fly ash as it had excellent performance. Its research and applications are on the rise largely as a substitute for cement. On the contrary, it is in a situation that the regulation of high fineness fly ash remains at a low level. As for the fly ash in $3,000{\sim}4,500\;cm^2/g$ class fineness regulated in KS L 5405, it is used by substituting it around the unit weight of cement 20%. Accordingly, the regulation in upper classification is in a situation of being insufficient. Therefore, this study aimed to establish 4000, 6000, and 8000 class of fineness of fly ash and three levels of substitute like 15%, 30%, and 45% in order to analyze the substitute and effect of water-binder ratio for fly ash that affected the properties of ternary system concrete. As a result of experiment by planning water-binder ratio for two levels like 40% and 50%, the more replacement ratio and fineness of fly ash increased in the performance not hardened, the more the fluidity increased. This study has found out that the air content decreased, and that there was setting acceleration and it decreased the heat of hydration. In addition, as for the strength properties in a state of performance hardened concrete, the more the replacement ratio and the ratio of water-binding materials increased, the more it had a tendency of being decreased.
Keywords
ternary system concrete; fly ash; fluidity; heat of hydration;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 이동하, 박재한, 강태경, 백민수, 김우재, 정상진 “하이볼륨 플라이애쉬 콘크리트의 초기강도 성상에 관한 실험적 연구,”대한건축학회 학술발표논문집, 22권, 2호, 2002, pp. 311-314.
2 규광일, 윤병수, 김진만, 남상일, 김무한 “플라이애쉬를 대체한 초고강도 콘크리트의 시공성 및 공학적 특성에 관한 기초적 연구,”한국콘크리트학회 학술대회 논문집, 5권, 2호, 1993, pp. 5-10.
3 이동하, 공민호, 박선길, 백민수, 이영도, 정상진, “플라이애쉬를 다량 치환한 콘크리트의 초기 특성에 관한 실험적 연구,”대한건축학회 추계학술발표대회 논문집, 21권, 2호, 2001, pp. 347-350.
4 백민수, 이영도, 정상진, “플라이애쉬를 다량 치환한 콘크리트의 수화열 및 강도특성에 관한 실험적 연구,”대한건축학회 논문집, 19권, 9호, 2003, pp. 87-94.
5 Brook, J. W., Berkey, Reynold A., and Farzam, H. “A Nonchloride Accelerating Admixture for Class CF Fly Ash,” Concrete International, Vol. 12, No. 10, 1990, pp. 51-54.
6 노영섭, 노형남, 김주상, 최세진, 이상수, 송하영, “고분말도 플라이애쉬를 사용한 모르타르의 공학적 특성에 관한 실험적 연구,”대한건축학회 학술발표논문집, 27권, 1호, 2007, pp. 563-567.
7 박영수, 노형남, 김주상, 김성수, 이상수, 송하영, “고품질 플라이애쉬를 사용한 모르타르의 물-결합재비 및 치환율에 따른 영향에 관한 연구,”한국콘크리트학회 학술대회 논문집, 19권, 2호, 2007, pp. 709-712.
8 이상수, 송하영, 원철, “F급 플라이애쉬를 사용한 콘크리트의 공학적 특성에 관한 연구,”대한건축학회논문집, 20권, 11호, 2004, pp. 67-74.