Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Research on Design Mixing and Manufacturing of Recycled Aggregate for Concrete and Coarse Aggregate of Steelmaking Slag

콘크리트용 순환골재와 제강슬래그의 굵은골재 설계배합 및 제조에 관한 연구

  • Jong-Gil Kim (Department of Civil Engineering, Chungwoon University) ;
  • Seung-Tae Lee (Department of Civil Engineering, Kunsan National University) ;
  • Tae-Han Kown (Department of Civil Engineering, Kunsan National University)
  • 김종길 (청운대학교 토목환경공학과) ;
  • 이승태 (군산대학교 토목공학과) ;
  • 권태한 (군산대학교 토목공학과)
  • Received : 2023.10.13
  • Accepted : 2023.10.16
  • Published : 2023.12.30
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Abstract

In this study, in order to minimize the increase in the amount of various industrial by-products due to the rapid growth of the industry and the intensification of the depletion of natural aggregate resources, the material test using recycled aggregate and steelmaking slag and the proper mixing ratio of recycled concrete were to be derived. In this study, first, the conformity of the quality standards of the materials used in the field was confirmed, and the workability and molding results were shown when used alone or mixed. Therefore, the feasibility of application as aggregate for concrete was evaluated through a total of 4-type mixtures of cement types, admixtures, coarse aggregates, and fine aggregates. As a result of the experiment, it was confirmed that the slump of unhardened concrete, the amount of air, chloride and compressive strength of hardened concrete according to the replacement rate were different from the measured values of general concrete quality characteristics. According to this, it was confirmed that the quality characteristics of the standard design criteria were satisfied.

본 연구는 산업의 급성장으로 각종 산업부산물의 발생량이 크게 증대되고 천연골재 자원의 고갈 현상이 심화되는 것을 최소화 하기 위해 순환골재와 제강슬래그를 이용 재료시험 및 재생 콘크리트 적정 혼합 배합비를 도출하고자 하였다. 본 연구에서는 먼저 현장에서 사용되고 있는 재료의 품질기준 적합도를 확인 단독 및 혼합 사용할 경우 작업성, 성형에 맞는 결과를 나타내었다. 따라서 시멘트의 종류 및 혼화재, 굵은골재, 잔골재를 구분 총 4-TYPE 배합을 통해 콘크리트용 골재로 활용 가능성을 평가하였다. 실험 결과 치환율에 따른 굳지않은 콘크리트 슬럼프와 공기량, 염화물과 경화된 콘크리트 압축강도를 실험 결과는 일반적인 콘크리트 품질특성 측정값과 차이가 있음을 확인할 수 있었고, 또한 콘크리트용 순환골재 및 제강슬래그를 굵은골재 치환율에 따라 표준 설계기준 품질특성을 만족함을 확인할 수 있었다.

Keywords

Acknowledgement

본 연구는 2021년도 청운대학교 학술연구비 지원에 의해 수행되었습니다.

References

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