Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Basic Characteristics of Slag Cement using CO2 Fixed Desulfurized Gypsum

CO2 고정 탈황석고를 사용한 슬래그 시멘트의 기초적 특성

  • Chun-Jin Park (Specialized Materials R&D Team, SAMPYO Industry Co., Ltd) ;
  • Jong-Ho Park (Specialized Materials R&D Team, SAMPYO Industry Co., Ltd) ;
  • Sung-Kwan Seo (Carbon Neutrality & Materials Digitalization Division, KICET)
  • 박천진 ((주)삼표산업 특화소재연구팀) ;
  • 박종호 ((주)삼표산업 특화소재연구팀) ;
  • 서성관 (한국세라믹기술원 저탄소‧디지털전환사업단)
  • Received : 2022.12.15
  • Accepted : 2023.02.25
  • Published : 2023.03.30
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Abstract

In this study, the basic properties of CO2 immobilized desulfurized gypsum (CFBG) and the possibility of being used as a stimulus for slag cement were reviewed, and performance evaluation was conducted through a concrete mixing test. The main components of CFBG were CaO and SO3, and CaO and SO3 increased as the drying temperature increased. The moisture content of undried CFBG was 15.7 %, the drying temperature was 1.7 % and the drying temperature was 0.03 % at 105 ℃. Mortar using CFBG tended to have a lower flow value as the drying temperature increased, and the compressive strength was equivalent to that of the FGB use mixture. As a result of the concrete experiment using CFBG SC, both slump and air volume satisfied the target range after 60 minutes, and the compressive strength tended to increase overall compared to the ternary binder mixture.

본 연구에서는 CO2 고정화 탈황석고(CFBG)의 건조온도에 따른 기초 물성 및 슬래그 시멘트의 자극재로 활용 가능성을 검토하였으며, 콘크리트 배합 시험을 통한 성능평가를 진행하였다. CFBG의 주요 성분은 CaO 및 SO3로 나타났으며 건조온도가 증가함에 따라 CaO 및 SO3가 증가하였다. 미건조 CFBG는 함수율이 15.7 %로 나타났으며 건조온도 85 ℃는 1.7 %, 105℃ 는 0.03 %로 나타났다. CFBG를 사용한 모르타르는 건조온도 증가에 따라 플로값이 저하하는 경향이었으며 압축강도는 FGB 사용 배합과 동등 수준을 나타냈다. CFBG SC를 사용 콘크리트 실험 결과 슬럼프 및 공기량은 60분 경과 후 모두 목표 범위를 만족하였으며, 압축강도는 일반 3성분계 배합 대비 전반적으로 증가하는 경향이었다.

Keywords

Acknowledgement

본 연구는 중소벤처기업부의 규제자유특구혁신사업육성 지원에 의해 수행되었습니다.

References

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