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Influence of Fly Ash Content with Respect to the Fresh and Mechanical Properties in Concrete

플라이애쉬 함유량이 콘크리트의 굳기전 성질 및 역학적 특성에 미치는 영향

  • 이진용 (동아건설 기술연구원 수석연구원) ;
  • 최수홍 (동아건설 기술연구원) ;
  • 강석화 (동양중앙연구소 건설재료연구실장) ;
  • 이광명 (성균관대학교 토목공학과)
  • Published : 1999.12.01

Abstract

The role of fly ash in concrete become impotant with finding the charateristics of fly ash in which it is used as cement replacement material. An experimental study is carried out to investigate the characteristics of concrete containing fly ash. The loss of slump and air content of fly ash concrete tested up to 120 minutes are lower than those of ordinary concrete, but the setting time and bleeding are increased with increasing fly ash content. The compressive and tensile strength of fly ash concrete are slightly lower than those of ordinary concrete between 7 and 28 days, however, the long-term (at 180 days) compressive strength of fly ash concrete is significantly higher. In addition, fly ash reduces the heat of hydration and peak of temperature rise in concrete.

Keywords

References

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