Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Evaluation of Mechanical Properties and Alkali-Silica Reaction of High Strength Mortar Using Waste Glass Sand

폐유리 잔골재를 치환한 고강도 모르타르의 역학적 특성 및 알칼리-실리카 반응 평가

  • Eu, Ha-Min (Department of Architectural Engineering, Chungnam national University) ;
  • Kim, Gyu-Yong (Department of Architectural Engineering, Chungnam national University) ;
  • Choe, Gyeong-Cheol (Institute of Social Infrastrusture Technology, Chungnam national University) ;
  • Son, Min-Jae (Department of Architectural Engineering, Chungnam national University) ;
  • Nam, Jeong-Soo (Department of Architectural Engineering, Chungnam national University)
  • 유하민 (충남대학교 건축공학과) ;
  • 김규용 (충남대학교 건축공학과) ;
  • 최경철 (충남대학교 사회기반시설기술연구소) ;
  • 손민재 (충남대학교 건축공학과) ;
  • 남정수 (충남대학교 건축공학과)
  • Received : 2020.11.05
  • Accepted : 2020.12.10
  • Published : 2020.12.30
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Abstract

In this study, high strength mortar and normal strength mortar using waste glass sand were evaluated. The main parameters studied were mechanical properties, alkali-silica reaction(ASR) and residual mechanical properties after ASR. As a result of this experiment, it was found that the increase in strength of the mortar has a limitation in improving the slip of the waste glass sand(GS), and rather, it causes a larger ASR. However, the possibility of improving the slip of GS was confirmed by the temporary increase of initial residal compressive and flexural strength of the mortar containing GS after the ASR. Therefore, to improve the slip of GS, the additional research is required, such as modification of the surface of GS and the incorporation of a binder which can increase the strength and makes matrix compact.

본 연구에서는 천연골재의 대체골재로써 폐유리 잔골재(이하 GS)를 고강도 모르타르에 혼입하여 일반강도 모르타르와의 역학적 특성, 알칼리-실리카 반응(이하 ASR), ASR 후 모르타르의 잔류 역학적 특성을 비교·분석하였다. 실험 결과, GS를 모르타르에 혼입하는 경우, 혼입률이 증가할수록 역학적 특성 저하 및 ASR 증가 현상이 확인되었다. 특히, 모르타르의 고강도화는 GS의 Slip 현상을 개선하기에는 한계가 있을 뿐만 아니라, 오히려 ASR을 더욱 촉진하는 것으로 확인되었다. ASR 후 잔류 역학적 특성에서 반응 초기에는 강도가 증가하였으나, 반응이 지속됨에 따라 강도가 감소하는 경향이 나타났다. 이를 통하여, ASR 생성물이 GS의 Slip 현상을 개선할 가능성이 있을 것으로 사료된다. 따라서, 폐유리 잔골재 Slip 현상을 개선하기 위한 GS 표면 개질 및 ASR 저감을 위한 혼화재 사용 등과 같은 후속 연구가 필요하다고 판단된다.

Keywords

References

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