Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Evaluation of Reproducibility for Mechanical Properties of Lightweight Concrete using Bottom Ash Aggregates and Foam

바텀애시 골재와 기포를 이용한 경량 콘크리트의 역학적 특성에 대한 재현성 평가

  • Ji, Gu-Bae (Department of Architectural Engineering, Kyonggi University) ;
  • Mun, Ju-Hyun (Department of Architectural Engineering, Kyonggi University) ;
  • Yang, Keun-Hyeok (Department of Architectural Engineering, Kyonggi University)
  • 지구배 (경기대학교 건축공학과 일반대학원) ;
  • 문주현 (경기대학교 건축공학과) ;
  • 양근혁 (경기대학교 건축공학과)
  • Received : 2019.05.26
  • Accepted : 2019.08.01
  • Published : 2019.09.30
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Abstract

The objective of this study is to examine the reproducibility for compressive strength development and mechanical properties of lightweight concrete made using bottom ash aggregates and foam(LWC-BF). Based on the mix proportions conducted by Ji et al., six identical mixes were prepared with different actual foam volume ratios from 0% to 25% and water-to-binder ratios from 25% to 30%. The presently measured properties, including initial slump, slurry density, compressive strength gains at different ages, splitting tensile strength, and modulus of rupture, were very close to those determined in the previous tests by Ji et al. Thus, the developed LWC-BF has a good potential in obtaining a reproducibility for compressive strength development and mechanical properties even though the troubles of mixing control owing to the addition of preformed foam.

이 연구의 목적은 저량의 기포가 혼입된 바텀애시 골재 기반 경량 콘크리트(Lightweight concrete made using bottom ash aggregates and foam, LWC-BF)의 압축강도 발현 및 역학적 특성에 대한 재현성 평가이다. 이를 위해 Ji et al.에 의해 수행되었던 동일한 배합표를 기준으로 총 6 배합을 수행하였다. 배합에서의 주요변수는 기포 혼입율과 물-결합재 비로서 각각 0~25% 및 25~30%로 변화하였다. 굳지 않은 콘크리트에서 초기 슬럼프, 슬러리 밀도와 굳은 콘크리트에서 재령별 압축강도, 쪼갬인장강도 및 파괴계수는 재현성 평가대상 이전 실험결과와 대체적으로 비슷하였다. 따라서, LWC-BF의 압축강도 및 역학적 특성은 기포 혼입에 의한 배합관리가 어려움에도 불구하고 그 재현성이 비교적 우수하였다.

Keywords

References

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