한국건축시공학회지 (Journal of the Korea Institute of Building Construction)

  • 제24권3호
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  • Pages.309-318
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  • 2024
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  • 1598-2033(pISSN)
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  • 2233-5706(eISSN)
한국건축시공학회 (The Korean Institute of Building Construction)
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산업부산물을 적용한 무 시멘트 프리캐스트 콘크리트의 물리적 특성 검토

A Review of Physical Properties of Cement-Free Precast Concrete Using Industrial By-Products

  • Jung, Young-Woong (School of Architecture, Kyungpook National University) ;
  • Yun, Ja-Yeon (School of Architecture, Kyungpook National University) ;
  • Shin, Kyung-Su (Department of Architecture Engineering, Woosong University) ;
  • Lee, Taegyu (Department of Fire and Disaster Prevention, Semyung University) ;
  • Choi, Hyeonggil (School of Architecture, Kyungpook National University)
  • 투고 : 2024.03.05
  • 심사 : 2024.04.11
  • 발행 : 2024.06.20
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초록

본 연구는 산업부산물인 STS슬래그, 열병합애시, 리턴더스트를 고로슬래그와 천연석고를 기반으로 한 프리캐스트 콘크리트에 적용하였을 때 미치는 영향에 대해 검토하였다. 본 연구의 범위에서 산업부산물의 사용량에 따른 공기량, 슬럼프, 압축강도를 측정하여 실험에 사용된 산업부산물들의 최적의 사용량을 추정하였다. 압축강도는 산업부산물들의 사용량에 관계없이 모두 우수한 결과를 보였으며, 특히 산업부산물들의 사용량 10% 범위에서 초기재령의 강도발현이 우수한 것으로 나타났다. 이는 XRD 및 SEM 분석을 통하여 산업부산물들이 프리캐스트 콘크리트의 제작과정인 증기양생을 거치며 콘크리트 강도에 영향을 미치는 수화생성물들을 보다 효율적으로 생성하였기 때문인 것으로 판단된다. 다만, 빠르게 강도를 발현해야하는 프리캐스트 콘크리트의 특성과 작업성 등을 고려한다면, 초기 재령에 강도가 빠르게 발현되는 산업부산물들의 사용량 10% 전후가 적정 사용량으로 판단된다.

This research investigated the feasibility of incorporating industrial by-products into precast concrete formulated with blast furnace slag and natural gypsum. Specifically, the study examined the effects of incorporating steelmaking slag(STS slag), combined heat power plant fly ash, and return dust. The optimal amount of these by-products was determined by measuring air content, slump, and compressive strength at various incorporation levels. Results demonstrated that compressive strength was enhanced across all levels of by-product addition. Notably, incorporating 10% of the by-products led to exceptional early-age strength development. However, a 20% addition of combined heat power plant ash significantly reduced the slump value by approximately 40%. Considering these findings and the requirement for rapid strength development in precast concrete applications, a 10% incorporation of industrial by-products was deemed optimal due to its ability to accelerate early-age strength gain.

키워드

과제정보

This research was funded by the Korea Agency for Infrastructure Technology Advencement(KAIA) grant funded by the Korean government(MOLIT)(grant number RS-KA162704) and the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT)(NRF-2021R1C1C1011347).

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