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Development of Concrete and Evaluation of Properties of Combined Steel making Slag Aggregates for Offshore Structure Production(II)

해양구조물 제조를 위한 제강슬래그 골재 조합별 물성평가 및 콘크리트 개발(II)

  • Jung, Won-Kyong (Department of Research Center, Korea Construction Quality Test Institute) ;
  • Kim, Hyun-Seok (Department of Research Center, Korea Construction Quality Test Institute) ;
  • Park, Dong-Cheon (Korea Maritime and Ocean University) ;
  • Cho, Bong-Suk (Research Institute of Industrial Science & Technology)
  • 정원경 ((주)한국건설품질시험연구원) ;
  • 김현석 ((주)한국건설품질시험연구원) ;
  • 박동천 (한국해양대학교) ;
  • 조봉석 ((재)포항산업과학연구원)
  • Received : 2016.01.19
  • Accepted : 2016.03.07
  • Published : 2016.04.30

Abstract

In this study, earlier analyzed tetrapod, one of an original group of offshore constructions studied for manufacturability of the concrete using the properties of steel making slag aggregate. steel making slag aggregate assessment, RCS and Blast Furnace Slag : the 20 mm air-cooled slag and combinations by 50 %, aggregate properties on the most appropriate for the properties of recycled aggregate concrete optimal mix, and assessing it. Properties of concrete used to be derived are judged as to bury the studies show that the hollowing-out of the RCS, plastic sole use is in the workability of the aggregate, plastic in the 20 mm slag also assessed to be a slight disadvantage, but RCS by mixing air-cooled coarse and 50 percent to 20 percent 50 mm. Thus, steel making slag marine structures using recycled aggregate, in rapid chilled slag or air-cooled slag. The sole use of the aggregate them than to combine the aggregate of concrete. After they satisfy the quality standard quality shall be used will aggregate steel making slag who meet the criteria concrete manufacturing in general or par with the aggregate of concrete. Performance was assessed as to develop a more than that.

본 연구에서는 앞서 분석된 제강슬래그 골재의 특성을 활용하여 해양구조물 중에 하나인 테트라포트에 대한 콘크리트 제조 가능성을 연구하였다. 제강슬래그 골재 평가결과, 급랭전로슬래그와 서랭식 20 mm 분쇄 슬래그 및 이들을 50%씩 조합한 골재의 물성이 콘크리트용 골재 물성에 가장 적합한 것으로 평가되어 이를 활용하여 콘크리트 물성을 평가하고 최적배합을 도출하고자 하였다. 연구 결과, 급랭전로슬래그(RCS), 서랭식 20 mm 슬래그 골재의 단독사용은 작업성, 성형성에 있어 다소 불리한 것으로 평가되었으나 RCS 50%와 서랭 20 mm 50%를 혼합하여 사용할 경우 작업성 향상 및 내구성 또한 향상되는 결과를 나타내었다. 따라서, 제강 슬래그 골재를 이용한 해양구조물 제조에 있어 급랭식 또는 서랭식 골재의 단독사용보다는 골재간 조합을 통하여 콘크리트용 골재 품질기준을 만족시킨 후 사용하여야 할 것이며, 골재 품질기준을 만족한 제강슬래그 골재는 콘크리트 제조에 있어 일반 콘크리트용 골재와 동등 또는 그 이상의 성능을 발현하는 것으로 평가되었다.

Keywords

References

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