Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Hydration Properties of High-strength Cementitious Composites Incorporating Waste Glass Beads

폐유리발포비드를 혼입한 고강도 시멘트 복합체의 수화 특성

  • Pyeon, Su-Jeong (Department of Architectural Engineering, Chungnam National University) ;
  • Kim, Gyu-Yong (Department of Architectural Engineering, Chungnam National University) ;
  • Lee, Sang-Soo (Department of Architectural Engineering, Hanbat National University) ;
  • Nam, Jeong-Soo (Department of Architectural Engineering, Chungnam National University)
  • 편수정 (충남대학교 건축공학과) ;
  • 김규용 (충남대학교 건축공학과) ;
  • 이상수 (한밭대학교 건축공학과) ;
  • 남정수 (충남대학교 건축공학과)
  • Received : 2022.02.23
  • Accepted : 2022.03.17
  • Published : 2022.03.30
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Abstract

In this study, the effect of a sudden decrease in internal humidity and a decrease in hydration level due to the tight internal structure of high-strength concrete and cement composites was investigated. To verify the change in the internal Si hydration, waste glass foam beads were used as a lightweight aggregate, and the internal unreacted hydrate reduction and hydrate formation tendency were identified over the mid- to long-term. Waste glass foam beads were mixed with 5, 10, and 20 %, and were used by pre-wetting. As the mixing rate of the waste glass foamed beads increased, the strength showed a tendency to decrease. In addition, when the mixing amount of pre-wetted waste glass foam beads increases inside through XRD analysis, TGA analysis, and Si NMR analysis, it is judged that the hydration degree of internal Si is different because moisture is supplied to the paste.

본 연구에서는 고강도 콘크리트 및 시멘트 복합체의 밀실한 내부 구조로 인한 급격한 내부 습도 저하 및 수화도 저하 등의 영향을 파악하고자 하였다. 내부 Si 수화도 변화 검증을 위해 폐유리발포비드를 경량골재로 사용하였으며, 중장기에 걸쳐 내부 미반응 수화물의 저감 및 수화물 형성 경향을 파악하였다. 폐유리발포비드는 5, 10, 20 % 혼입되었으며 프리웨팅하여 사용하였다. 폐유리발포비드의 혼입률이 증가함에 따라 강도는 감소하는 경향을 보였다. 이와 함께 XRD 분석, TGA 분석 및 Si NMR 분석을 통해 프리웨팅된 폐유리발포비드의 혼입량이 내부에 증가할 때, 페이스트에 수분이 공급되는 것으로 내부 Si의 수화 정도는 달라지는 것으로 판단된다.

Keywords

Acknowledgement

본 논문은 2020년 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임(No. 2020R1C1C101403812).

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