Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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The Effect of Recycled Glass Sand Usage Conditions on the Mechanical Properties and Alkali-Silica Reaction of Mortar

순환유리 잔골재의 사용 조건이 모르타르의 역학적 특성 및 알칼리-실리카 반응에 미치는 영향

  • Min-Jae Son (Korea Institute of Civil Engineering and Building Technology) ;
  • Gyu-Yong Kim (Department of Architectural Engineering, Chungnam University) ;
  • Hyun-Sang Choi (Korea Institute of Civil Engineering and Building Technology) ;
  • Gyeong-Cheol Choi (Korea Institute of Civil Engineering and Building Technology) ;
  • Tae-Hyeob Song (Korea Institute of Civil Engineering and Building Technology)
  • 손민재 (한국건설기술연구원 미래스마트건설연구본부) ;
  • 김규용 (충남대학교 건축공학과) ;
  • 최현상 (한국건설기술연구원 미래스마트건설연구본부) ;
  • 최경철 (한국건설기술연구원 건축연구본부) ;
  • 송태협 (한국건설기술연구원 건축연구본부)
  • Received : 2024.07.01
  • Accepted : 2024.07.24
  • Published : 2024.09.30
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Abstract

In recent years, there has been an increasing amount of waste glass that cannot be recycled and is landfilled among construction and household waste. To address this issue, research has been conducted to recycle waste glass as sand, but conflicting results have emerged depending on the type of waste glass and the manufacturing method of recycled glass sand(RGS). To promote the use of RGS, it is necessary to review its performance under field conditions, such as mass production processes and real scale concrete applications. This study introduces examples of mass production system process for RGS and evaluates the effects of the usage conditions(color, content, particle size) of mass-produced RGS on the mechanical properties and alkali-silica reaction(ASR) of mortar. As a result, the mass production system process of RGS causes microcracks inside the particles, which are the cause of mortar strength reduction and ASR expansion. The number of microcracks is highest in clear RGS. Based on these results, it is proposed that RGS can be used as a replacement for natural sand with a content of less than 25 % or a particle size of less than 0.5 mm.

최근 건설 및 생활폐기물 중에서 재활용되지 못하고 매립되는 폐유리가 증가함에 따라 이를 잔골재로써 재활용하기 위한 연구들이 진행되고 있다. 그러나 폐유리의 종류 및 순환유리 잔골재(RGS) 제조 방법에 따라 상반되는 연구 결과가 나타나 RGS의 활용을 촉진하는데 어려움을 겪고 있다. RGS의 활용을 촉진하기 위해서는 대량 생산 공정 또는 실제 콘크리트 적용 등 현장 조건에서의 검토가 필요하다. 이에 본 연구에서는 RGS의 대량 생산 공정 사례를 소개하고, 대량 생산된 RGS의 사용 조건(색상, 함량, 입자 크기)이 모르타르의 역학적 특성 및 알칼리-실리카 반응(ASR)에 미치는 영향에 대하여 평가하였다. 그 결과, RGS의 대량 생산 공정은 입자 내부에 미세균열을 유발하여 모르타르의 강도 저하 및 ASR 팽창의 주요 원인이 되었다. 이러한 미세균열은 투명한 RGS에 가장 많은 것으로 나타났다. 결과적으로, RGS의 사용 가능한 조건으로 함량 25 % 미만 또는 입자 크기 0.5 mm 미만의 천연 잔골재 대체를 제안하였다.

Keywords

Acknowledgement

본 논문은 국토교통과학기술진흥원 건축물 안전해체 계획 및 시공 기술 개발(과제코드: RS-2023-00246154)의 지원에 의해 수행되었습니다. 이에 감사드립니다.

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