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동제련 슬래그를 혼입한 고강도 콘크리트의 유동특성에 관한 연구

The Fluidity Properties of High Strength Concrete adding Copper Slag as Mineral Admixture

  • 이동운 (동서대학교 건축토목공학부) ;
  • 윤종진 (동서대학교 건축토목공학부) ;
  • 김대영 (동의대학교 건축공학)
  • Lee, Dong-Un (Division of Architecture & Civil Engineering, Dongseo University) ;
  • Yoon, Jong-Jin (Division of Architecture & Civil Engineering, Dongseo University) ;
  • Kim, Dae-Young (Division of Architectural Engineering, Dong-Eui University)
  • 투고 : 2016.07.06
  • 심사 : 2016.10.07
  • 발행 : 2016.10.31

초록

본 연구의 목적은 고강도 콘크리트에 광물성 혼화재로서 동제련 슬래그를 혼입하였을 때 유동특성을 파악하기 위한 것이다. 이를 위해 동제련 슬래그를 고강도 콘크리트의 결합재로 사용하여 10 %, 20 %, 30 %, 40 %, 50 %를 시멘트로 대체하여 사용하였다. 그리고 굳지않은 콘크리트에서 슬럼프플로, 500mm도달시간, V-Funnel과 U-Boxt시험을 실시하여 유동성 및 충전성을 알아보았고, 굳은 콘크리트에서는 재령 3, 7, 14, 28일의 콘크리트 압축강도를 측정하였다. 상기의 실험결과, 동제련 슬래그를 광물설 혼화재료로 혼입한 콘크리트의 굳지 않은 콘크리트 특성을 살펴보면 동제련 슬래그의 치환율이 30%까지는 유동성이 증가하였으며, 충전성이 우수한 것을 알 수 있었다. 그리고 굳은 콘크리트의 특성을 살펴보면 동제련 슬래그의 치환율이 30 %일때까지 모든 재령에서 압축강도가 증가하는 것을 확인할 수 있었다. 그러나 동제련 슬래그의 치환율이 30%를 초과하였을 때는 유동성, 충전성 및 압축강도가 감소하는 것을 확인할 수 있어 동제련 슬래그의 최적 치환율은 30 %이내가 적정할 것으로 판단된다.

This study examines the properties of high-fluidity concrete after adding copper slag as a mineral admixture. For this purpose, the replacement ratio of cement to copper slag was varied to 0, 10, 20, 30, 40, and 50%. A slump flow test, reach time slump flow of 500 mm, and a U-Box and O-lot test were conducted on the fresh concrete. The compressive strength of the hardened concrete was determined at 3, 7, 14 and 28 days. According to the test results, the workability, compaction, and compressive strength of the high-fluidity concrete increased when replacing 30% of the cement with copper slag. These parameters decreased for all material ages with more than 30% copper slag, which was the optimal mixture ratio.

키워드

참고문헌

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