대한건축학회논문집 (Journal of the Architectural Institute of Korea)

  • 제38권2호
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  • Pages.187-195
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  • 2022
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  • 2733-6239(pISSN)
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  • 2733-6247(eISSN)
대한건축학회 (Architectural Institute of Korea)
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순환 잔골재에 부착된 시멘트 페이스트의 영향에 의한 고강도 콘크리트의 물리적 특성 변화

Changes in Physical Properties of High-strength Concrete due to the influence Cement Paste Attached to Recycled Fine Aggregates

  • Kim, Han-Sic (Lab. of Noise Complaint, Samsung C&T) ;
  • Ha, Jung-Soo (Dept. of Architectural Engineering, Dankook University) ;
  • Lee, Young-Do (Dept. of Architectural Engineering, Kyungdong University)
  • 투고 : 2021.12.27
  • 심사 : 2022.02.14
  • 발행 : 2022.02.28
⟨ 이전 논문 다음 논문 ⟩

초록

This study is to confirm an appropriate substitution rate by evaluating the autogenous shrinkage and physical properties of high-strength concrete by supplying moisture required for hydration reaction by recycled fine aggregates containing a lot of moisture by attached cement paste. The experimental variables were the moisture content and substitution rate of the recycled fine aggregate, and the hydration temperature, length change, and compressive strength characteristics were evaluated. As moisture was supplied by recycled fine aggregates, cement paste at a low water-cement ratio was able to reduce autogenous shrinkage and continue hydration reactions. However, when the substitution rate of the recycled fine aggregate exceeds 30%, the decrease in strength was large due to the influence of the attached cement paste. From these results, it was confirmed that the decrease in strength due to the attachment cement paste was not significant and the substitution rate of the recycled fine aggregate that helps to continue the hydration reaction was 30%.

키워드

과제정보

이 연구는 2020년도 정부(교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업임. (No. NRF-2020R1I1A3072819) 이 논문은 2021년도 경동대학교 교비연구비로 연구되었음.

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