Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Properties of Reformed Electric Arc Furnace Slag as Cement Admixtures

용융개질 전기로슬래그의 시멘트 혼화재로서 특성

  • Kim, Kee-seok (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Bae, In-kook (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Seo, Joo-beom (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Choi, Jae-Seok (Convergence Technology Division, Korea Conformly Laboratories) ;
  • Lee, Yoon-kyu (Tea-Young ENC.) ;
  • Kim, Hyung-seok (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources)
  • 김기석 (한국지질자원연구원 광물자원연구본부) ;
  • 배인국 (한국지질자원연구원 광물자원연구본부) ;
  • 서주범 (한국지질자원연구원 광물자원연구본부) ;
  • 최재석 (한국건설생활환경시험연구원 융합기술팀) ;
  • 이윤규 (태영건설) ;
  • 김형석 (한국지질자원연구원 광물자원연구본부)
  • Received : 2015.09.07
  • Accepted : 2015.11.13
  • Published : 2015.12.30
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Abstract

Ground granulated blast-furnace slag (GGBFS) which is by-product of steel industry has been recycled as a cement admixture though the other steel slags are used as aggregates. In this study, the electric arc furnace slag (EAFS) was used as a cement admixture after the reduction of iron oxide in the slag at the interface of molten slag and water quenching. Consequently, the reformed EAFS (REAFS) had higher grindability than that of granulated blast furnace slag. And in mortar tests, the strength properties of specimens using REAFS were 98% of plain specimens of GGBFS upto 20% replacement ratio of GGBFS with REAFS.

철강산업 부산물 중 고로슬래그는 시멘트혼화재로 재활용되고 있지만 제강 슬래그들은 주로 골재로서 활용되고 있다. 본 연구는 전기로 산화슬래그를 대상으로 용융상태에서 철을 환원시켜 개질한 후 물로 급랭하여 제조된 비정질 슬래그를 시멘트 혼화재로 활용하고자 하였다. 개질된 전기로 산화슬래그는 고로수쇄슬래그 보다 분쇄성이 높았으며, 고로슬래그와 개질산화슬래그를 혼합하여 제조한 슬래그 시멘트의 모르타르 실험결과 고로슬래그에 대한 개질산화슬래그 대체율 20%까지는 비교시험체의 98%에 해당하는 압축강도 특성을 나타냈다.

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References

  1. KS L 5106, Testing method for fineness of portland cement by air permeability apparatus.
  2. KS L ISO 679, Method of testing cements - Determination of strength.
  3. KS L 5201, Portland cement.
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