Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Effect of Properties of Fly-ashes on the Characteristics of Fly-ash Mortars

플라이애시 종류에 따른 플라이애시 모르타르의 특성에 대한 연구

  • 김주형 (한국건설생활환경시험연구원 첨단건설재료센터) ;
  • 박병선 (한국건설생활환경시험연구원 첨단건설재료센터) ;
  • 정상화 (한국건설생활환경시험연구원 첨단건설재료센터) ;
  • 최영철 (한국건설생활환경시험연구원 첨단건설재료센터)
  • Received : 2016.11.28
  • Accepted : 2016.12.15
  • Published : 2016.12.30
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Abstract

Recently, a large number of researches about concrete containing high volume fly-ash(HVFA) have been carried to obtain carbon dioxide reduction, resource recycle and durable option in concrete industry. The quality of fly-ash such as chemical composition and fineness has high variability due to the differences of used fuels, operation condition in power plant. The aim of this study is to investigate the performances of fly-ash cement mortar containing different type of fly-ashes. The basic analysis of fly ash such as chemical composition, SEM image analysis were performed. Many mortar specimens were fabricated to evaluate the properties (compressive strength, drying shrinkage and carbonation) of mortar with various fly ash. From the test results, the quality of each fly ash must be considered and fully weighted in fly ash concrete.

최근 온실가스 저감 및 자원 재활용 등의 목적으로 플라이애시를 대량으로 사용하기 위한 연구가 활발히 진행되어오고 있다. 하지만, 플라이애시의 경우 생산 조건에 따른 품질 변동성이 크기 때문에 레드믹스트 콘크리트로의 대량 활용에 어려움이 있다. 본 연구에서는 국내 8개 화력발전소에서 생상되는 플라이애시를 대상으로 이를 이용한 플라이애시 모르타르에 대한 성능평가에 대한 연구를 수행하였다. 이를 위해 플라이애시에 대한 화학분석 등의 기초물성을 분석하였으며, 이를 활용한 플라이애시 모르타르에 대한 응결, 흐름, 압축강도 발현, 건조수축 및 탄산화 특성을 분석하였다. 각 화력발전소에서 생산된 플라이애시는 사용 연료 및 연소 조건 등의 상이에 의해 플라이애시의 구성 성분과 형상이 크게 다르게 나타났으며, 이러한 이유로 플라이애시 모르타르의 응결, 흐름, 압축강도, 건조수축, 탄산화에 대한 특성에 대한 변동성이 나타났다.

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References

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