Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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A Study for Analyzing the Mechanism of Enhanced Cementitious Reactivity of Bottom Ash by Using Functional Grinding Agent

기능성 분쇄조제를 통한 건조저회의 시멘트 반응성 메커니즘 분석 연구

  • Ahyeon Lim (Department of Civil and Environmental Engineering, Seoul National University) ;
  • Hyunuk Kang (Department of Civil and Environmental Engineering, Seoul National University) ;
  • Juhyuk Moon (Department of Civil and Environmental Engineering, Seoul National University)
  • 임아현 (서울대학교 건설환경공학부) ;
  • 강현욱 (서울대학교 건설환경공학부) ;
  • 문주혁 (서울대학교 건설환경공학부)
  • Received : 2024.07.13
  • Accepted : 2024.09.02
  • Published : 2024.09.30
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Abstract

In this study, commercially available chemical activator was utilized as a grin din g agen t for bottom ash to develop bottom ash blended cement. The hydration characteristics of the bottom ash blended cement were analyzed using X-ray diffraction and thermogravimetric analysis. In particular, the PONKCS method was employed to quantify the amorphous C-S-H and bottom ash. The use of chemical activator delayed the hydration reaction of the cement and reduced the reactivity of the bottom ash. However, appropriate delay of hydration and enhanced reaction of aluminate successfully led to the formation of a substantial amount of monocarboaluminate. Consequently, the use of chemical activator greatly improved the compressive strength of the bottom ash blended cement, resulting in the 20240713development of high-performance bottom ash blended cement.

본 연구에서는 상용화된 화학적 활성화제를 바텀애시의 분쇄조제로 활용하여 바텀애시 치환 시멘트를 개발하였다. X-선 회절분석과 열중량분석법을 사용하여 바텀애시 치환 시멘트의 수화 특성을 분석하였으며, 특히 PONKCS 방법을 활용하여 비정질인 C-S-H와 바텀애시를 정량화하였다. 분쇄조제 형태로 첨가된 화학적 활성화제에 의해 시멘트의 수화 반응이 지연되었을 뿐만 아니라 바텀애시의 반응성도 감소하였다. 그러나 적절한 수화 지연 현상과 알루미네이트 반응 촉진 효과로 인해 상당량의 헤미카르보알루미네이트 및 모노카르보알루미네이트가 생성되었다. 이에 따라 궁극적으로 바텀애시 치환 시멘트의 압축강도가 크게 향상되어 적정기술로서 바텀애시의 재활용에 기여할 수 있을 것으로 판단된다.

Keywords

Acknowledgement

본 연구는 한국중부발전 현장기술개발 사업(과제명: 바텀애시 분쇄촉매화를 통한 기존 플라이애시 동등 성능 이상의 SCM 개발 실증)의 연구비 지원으로 수행되었으며, 이에 감사드립니다.

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