Properties of Flowable High-volume Fly Ash-Cement Composites

다량의 플라이애쉬를 사용한 유동성 시멘트복합체의 특성

  • 원종필 (건국대학교 농공학과) ;
  • 신유길 (건국대학교 농공학과 대학원) ;
  • 안태송 (한국도로공사 도로연구소 재 료연구실장)
  • Published : 1998.10.01

Abstract

The purpose of this was to examine the used of fly ash as a type of construction material. In this paper the results from a recent study on development of a cement composite utilizing relatively large amount of fly ash are presented. The flowable fly ash-cement sand composite was investigated for strength and flowability characteristics. The independent variable considered were: fly-ash content, sand content, and ratio of water to cementitious materials. Results of this study show that high volume fly-ash composite can be proportioned to obtain 10~15kg/$\textrm{cm}^2$ compressive strength at 28 days. For applications requiring strength between 10kg/$\textrm{cm}^2$ and 15kg/$\textrm{cm}^2$, the mixture with fly ash-cement ratio of 5.6 and sand-cement ratio of 28 with relatively high water content may be used. Slump was held at 25$\pm$1cm for all mixtures produced compressive strength at 28 days were found to range from 5kg/$\textrm{cm}^2$ to 13.7kg/$\textrm{cm}^2$.

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