한국건설순환자원학회논문집 (Journal of the Korean Recycled Construction Resources Institute)

한국건설순환자원학회 (Korean Recycled Construction Resources Institute)
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탄산화 양생이 순환유동층 보일러 애시의 수화특성에 미치는 영향

Effect of Carbonation Curing on the Hydration Properties of Circulating Fluidized Bed Boiler Ash

  • 차수원 (울산대학교 건설환경공학부) ;
  • 이시은 (가천대학교 토목환경공학과) ;
  • 이원준 (가천대학교 토목환경공학과) ;
  • 최영철 (가천대학교 토목환경공학과)
  • Soo-Won Cha (Department of Civil and Environmental Engineering, University of Ulsan) ;
  • Shi-Eun Lee (Dept. of Civil & Environment Engineering, Gachon University) ;
  • Won-Jun Lee (Dept. of Civil & Environment Engineering, Gachon University) ;
  • Young-Cheol Choi (Dept. of Civil & Environment Engineering, Gachon University)
  • 투고 : 2023.09.25
  • 심사 : 2023.10.25
  • 발행 : 2023.12.30
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초록

본 연구에서는 유리석회 함량이 다른 순환유동층 보일러 애시의 수화특성 및 탄산화 특성에 대해 조사하였다. 또한, free-CaO 함량이 높은 CFBC ash를 탄산화 양생 전처리를 하여 시멘트계 재료로의 활용 가능성을 살펴보았다. Free-CaO 함량이 높은 CFBC ash를 혼합한 경우 급결의 양상을 보였으며 낮은 초기 압축강도를 나타냈다. Free-CaO 함량이 높은 CFBC ash를 탄산화 양생하였을 때, 양생 기간에 따라 이산화탄소 포집량이 증가하였다. 또한, free-CaO 값이 함께 감소하였으며 free-CaO가 이산화탄소와 반응한 것으로 보인다. Free-CaO 함량이 높은 CFBC ash를 탄산화 양생 전처리를 한 경우 급결이 나타나지 않았으며, 초기 압축강도도 향상된 것을 확인할 수 있었다. 연구 결과 free-CaO 함량이 높은 CFBC ash의 경우 적절한 탄산화 양생을 통해 시멘트계 재료로 활용 가능성이 높은 것으로 나타났다.

In this study, the hydration and carbonation properties of circulating fluidized bed boiler (CFBC) ash with different free-CaO contents were investigated. In addition, the possibility of utilizing CFBC ash with a high free-CaO content as a cementitious material was investigated by carbonation curing as a pretreatment. The CFBC ash with high free-CaO content exhibited rapid setting behavior and low early compressive strength when mixed with cement. For CFBC ash with high free-CaO content, carbon dioxide capture increased with the duration of carbonization curing. In addition, the free-CaO value decreased together, indicating that the free-CaO reacted with carbon dioxide. When the CFBC ash with high free-CaO content was pretreated by carbonation, no fresh set appeared, and the initial compressive strength was improved. From the results of this study, it is confirmed that CFBC ash with high free-CaO content has a high potential to be utilized as a cementitious material through proper carbonation curing.

키워드

과제정보

본 연구는 2023년도 산업통상자원부 및 한국산업기술평가관리원(KEIT)의 연구비 지원에 의해 수행되었음. (과제번호 20018156)

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