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

The Korea Association of Crystal Growth (한국결정성장학회)
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Analysis of mechanical properties of secondary concrete products using CO2 captured material

이산화탄소 고정 탄산화물을 적용한 콘크리트 2차 제품의 기초 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) ;
  • Kuem-Dan Park (Korea Institute of Ceramic Engineering and Technology, Carbon Neutral Materials Center) ;
  • Hyuk-Joon Kwon (SinWoo Industry Development Co., Ltd., Technical Research Center) ;
  • Jeong-Hwan Kim (HANILECO INDUSTRY Co., Ltd., Technical Rsearch Center)
  • 유혜진 (한국세라믹기술원 탄소중립소재센터) ;
  • 서성관 (한국세라믹기술원 탄소중립소재센터) ;
  • 박금단 (한국세라믹기술원 탄소중립소재센터) ;
  • 권혁준 (신우산업개발(주) 기술연구소) ;
  • 김정환 (한일에코산업(주) 기술연구소)
  • Received : 2024.04.11
  • Accepted : 2024.04.19
  • Published : 2024.04.30
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Abstract

In this study, the applicability of CCMs (Carbondioxide conversion capture materials) manufactured by reacting carbon dioxide gas with DG (Desulfurization gypsum) as a cement substitute for secondary concrete products were evaluated and the basic physical properties of CCMs-mixed mortar and concrete specimens were measured to derive the optimal mixing ratio. The main chemical oxides of CCMs were CaO and SO3, and the main crystalline phases were CaSO4·2H2O, Ca(OH)2, CaCO3, and CaSO4. In addition, by the results of particle size analysis and heavy metal measurement, the applicability of CCMs as a cement substitute for secondary concrete products was confirmed. As a result of measuring the strength behavior using mortar and concrete specimens with CCMs, the compressive and flexural strength decreased as the mix ratio of CCMs increased, but requirements by the standards for interlocking blocks and retaining wall blocks, which are target products in this study, were satisfied up to the optimal mixing ratio of 10 wt.% substitution. Therefore, its applicability as a cement substitute for secondary concrete products was confirmed.

본 연구에서는 탈황석고(DG)에 이산화탄소를 반응시켜 제조한 탄산화물(CCMs)을 콘크리트 2차 제품의 시멘트 대체재로서 적용 가능성을 평가하고 최적 배합비 도출을 위한 탄산화물 혼입 모르타르 및 콘크리트 시편의 기초 물성 측정을 실시하였다. 탄산화물은 다량의 CaO 및 SO3로 이루어져 있으며, 주요 결정상은 CaSO4·2H2O, Ca(OH)2, CaCO3 및 CaSO4로 나타났다. 또한 입도 분석 및 폐기물공정시험기준에 따른 중금속 측정 결과 콘크리트 2차 제품의 시멘트 대체재로서 탄산화물의 적용 가능성이 확인되었다. 모르타르 및 콘크리트 공시체 제작 후 강도 거동 측정 결과 탄산화물 혼입량이 증가할수록 강도가 감소하는 경향을 나타내었으나 최적 배합인 치환 비율 10 wt.% 배합까지 대상 제품인 인터로킹 블록 및 옹벽 블록의 기준에서 요구하는 모든 조건을 만족하였다. 따라서 콘크리트 2차 제품의 시멘트 대체재로서 적용 가능성이 확인되었다.

Keywords

Acknowledgement

본 연구는 중소벤처기업부의 규제자유특구혁신사업육성 지원에 의한 연구임.

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