Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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Compressive Strength Development of Concrete using Electric Arc Furnace Oxidizing Slag Aggregates

전기로 산화슬래그 골재 콘크리트의 압축강도 발현 특성

  • 정기태 (경기대 건축공학과) ;
  • 양근혁 (경기대 건축공학과) ;
  • 김도범 (엔아이스틸 R&D LAB) ;
  • 이동섭 (포스코 철강솔루션 R&D센터 구조연구그룹)
  • Received : 2023.08.10
  • Accepted : 2023.09.14
  • Published : 2023.10.30
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Abstract

This study examined the compressive strength development of concrete using electric arc furnace oxidizing (EAFO) slag particles as a coarse aggregate. The main parameters considered were water-to-binder (W/B) ratio, maximum size of aggregates, and curing temperature (T). The test results showed that the 28-day compressive strength [fc(28)] of EAFO slag aggregate concrete was commonly lower than the conventional concrete using natural aggregates with the same W/B ratio, indicating greater differences under T of 5 ℃ and 35 ℃ than under T of 20 ℃. Additionally, a lower decreasing rate of fc(28) with respect to the increase in W/B ratio was observed for EAFO slag aggregate concrete than for the conventional concrete using natural aggregates. No crossover effect was observed for EAFO slag aggregate concrete cured under the different temperatures. The previous models formulated from equivalent age method were not reasonable in assessing the compressive strength development of EAFO slag aggregate concrete. Therefore, this study modified the parameter explaining the compressive strength gain rate specified in KDS 14 20 to assess the effect of curing temperature on the strength gain rate of EAFO slag aggregate concrete.

Keywords

Acknowledgement

이 연구는 2022년도 철강융합신기술연구조합의 연구사업지원에 의해 수행되었습니다.

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