Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Characteristic analysis of mortar using desulfurization gypsum and carbon dioxide conversion capture materials as a cement admixture

탈황석고와 탄산화물을 혼합재로 사용한 모르타르의 특성 분석

  • Hye-Jin Yu (Korea Institute of Ceramic Engineering and Technology, Carbon Neutral Materials Center) ;
  • Sung-Kwan Seo (Korea Institute of Ceramic Engineering and Technology, Carbon Neutral Materials Center) ;
  • Yong-Sik Chu (Korea Institute of Ceramic Engineering and Technology, Carbon Neutral Materials Center) ;
  • Keum-Dan Park (Korea Institute of Ceramic Engineering and Technology, Carbon Neutral Materials Center)
  • 유혜진 (한국세라믹기술원 탄소중립소재센터) ;
  • 서성관 (한국세라믹기술원 탄소중립소재센터) ;
  • 추용식 (한국세라믹기술원 탄소중립소재센터) ;
  • 박금단 (한국세라믹기술원 탄소중립소재센터)
  • Received : 2024.05.29
  • Accepted : 2024.06.13
  • Published : 2024.06.30
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Abstract

In this study, the characteristics of mortar using carbondioxide conversion capture materials (CCMs), fabricated by reacting CO2 with desulfurization gypsum (DG) by-produced from a oil refinery, as a cement mixture. Based on the chemical component and particle size analysis results, it estimated that desulfurized gypsum reacted with carbon dioxide to produce carbonate crystals such as CaCO3. Using CCMs as a cement mixture, physical property and durability analysis were conducted by measuring such as workability, compressive strength, compressive strength ratio after freezing-thawing and accelerated carbonation depth. The experimental results showed that as the content of the admixture increased, workability and compressive strength characteristics decreased. Compressive strength after freezing-thawing and accelerated carbonation depth also showed similar characteristics to the physical property measurement results. In addition, compared to desulfurized gypsum, using CCMs showed better physical properties and durability. This was assumed to be due to differences in the crystal phases of the mixed materials such as free-CaO and CaCO3.

본 연구에서는 국내 정유사에서 발생하는 탈황석고(DG)와 이산화탄소를 반응시켜 제조한 이산화탄소전환탄산화물(CCMs)을 시멘트 혼합재로 적용한 모르타르의 특성 분석을 실시하였다. 화학성분, 입도 분석 결과를 통해 탈황석고와 이산화탄소가 반응하여 CaCO3 등의 탄산화물 결정이 생성된 것을 추정할 수 있었으며, 이를 시멘트 혼합재로 활용하여 작업성, 압축강도 등의 물성과 동결융해 후 압축강도 및 촉진탄산화 깊이 측정을 실시하여 내구성 분석을 실시하였다. 실험 결과, 혼합재의 함량이 증가할수록 작업성 및 압축강도 특성이 낮아지는 것을 확인할 수 있었으며, 동결융해 후 압축강도, 촉진 탄산화 깊이 또한 물성 측정 결과와 유사한 경향을 나타내었다. 아울러 탈황석고 대비 탄산화물을 혼합할 경우 물성 및 내구성이 양호하게 나타나는 것을 확인할 수 있었으며, 이는 미반응 CaO 및 CaCO3 등 혼합재의 결정상 차이에 따른 것으로 판단되었다.

Keywords

Acknowledgement

본 연구는 중소벤처기업부의 규제자유특구혁신사업육성 지원에 의한 연구임.

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