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An Experimental Study on Rapid Repairing Mortar for Road with Steel Slag

철강 슬래그를 사용한 도로용 긴급보수 모르타르에 관한 실험적 연구

  • Jung, Ui-In (Research Institute (Attached), JoongAng ALTEC) ;
  • Kim, Bong-Joo (Department of Architectural Engineering, Kongju National University) ;
  • im, Jin-Man (Department of Architectural Engineering, Kongju National University) ;
  • Kwak, Eun-Gu (ECM Tech)
  • Received : 2018.02.05
  • Accepted : 2018.09.13
  • Published : 2018.10.20

Abstract

The purpose of this study is to recycle steel slag generated from the iron producing process and to use steel slag as a construction material which is currently landfilled Steel slag is subjected to aging treatment due to the problem of expansion and collapse when it reacts with water. The Slag Atomizing Technology (SAT) method developed to solve these problems of expanding collapse of steel slag. In this study, experimental study on the emergency repair mortar using the reducing slag, electric arc furnace slag and silicon manganese slag manufactured by the SAT method is Reduced slag was shown an accelerated hydration when it was replaced with rapidly-setting cement, and the rate of substitution was equivalent to 15%. It is shown that the electric furnace oxide slag is equivalent to 100% of the natural aggregate, and it can be replaced by 15-30% when the silicon manganic slag is substituted for the electric furnace oxide slag. With the above formulation, it was possible to design the rapidly repair mortar for road use. These recycling slags can contribute on achieving sustainability of construction industry by reducing the use of cement and natural aggregates and by reducing the generation of carbon dioxide and recycling waste slag.

본 연구는 철 생산 공정 중에 발생되는 철강슬래그를 재활용하는 것으로 매립에 의존하는 철강 슬래그를 건설용 재료로 사용하는 것이다. 철강 슬래그는 물과 반응할 경우 팽창 붕괴되어지는 문제로 인하여 에이징 처리를 실시하고 있다. 이런 문제점을 해결하기 위하여 개발된 SAT 공법은 철강슬래그의 팽창 붕괴에 대한 안전성을 갖는다. 이에 본 연구에서는 SAT 공법에 의해 제조된 환원슬래그와 전기로 산화슬래그, 실리콘 망간 슬래그를 사용하여 도로용 긴급 보수모르타르에 관한 실험적 연구를 실시하였으며 다음과 같은 결론을 도출하였다. 환원슬래그는 초속경 시멘트에 대해 대체할 경우 속경성을 갖는 것으로 나타났으며, 대체율 15%까지는 동등하게 나타났다. 전기로 산화슬래그는 천연 골재에 대해 100% 대체하여도 동등한 특성을 갖는 것으로 나타났으며, 이런 전기로 산화슬래그에 대해서 실리콘 망간 슬래그를 대체할 경우 15-30%까지 대체가 가능한 것으로 나타났다. 이상의 배합으로 도로용 긴급 보수 모르타르의 배합 설계가 가능하였다. 이런 슬래그를 재활용은 시멘트와 천연 골재의 사용량을 저감시켜 이산화탄소 발생의 감소와 폐기물인 슬래그를 재활용으로 녹색 산업에 이바지가 가능하다.

Keywords

References

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