Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Characteristics of Cement Matrix/Mortar with CaO-based Activated-sludge

CaO원 활성슬러지를 혼입한 시멘트 경화체 및 모르타르의 특성

  • 이용수 (한국콘크리트시험원) ;
  • 유성룡 (한국콘크리트시험원) ;
  • 신광호 (한국콘크리트시험원) ;
  • 추용식 (한국세라믹기술원 에너지환경소재본부) ;
  • 김영엽 (한양대학교 건축시스템공학과)
  • Received : 2017.05.04
  • Accepted : 2017.06.05
  • Published : 2017.08.31
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Abstract

CaO-based by-product, which consist of CaO, $SO_3$, $Al_2O_3$ and so on, has being used to raw materials of CaO compound. When It was applied to recycling water of remicon, concrete performance can be enhanced because hydration reaction of powder material is accelerated. In this study, activated-sludge, which was putted desulfurization gypsum of CaO-based in recycling water, was manufactured to verify effect of them, and then they was investigated by characteristics of cement matrix and mortar. As a results, they indicated reduction of setting time and high soundness in cement matrix, and acceleration of hydration reaction can be verified by XRD analysis. Also, it can be maintained good workability if water content by usage of desulfurization gypsum, which used for production of activated-sludge, was adjusted. In addition, it can be verified strength development by activated-sludge although cement content by usage of desulfurization gypsum was reduced.

CaO원 산업부산물은 CaO, $SO_3$ 및 $Al_2O_3$ 등으로 구성되어 있어 CaO 화합물의 원료로 사용되고 있다. 이러한 CaO원 산업부산물을 레미콘 회수수에 적용할 경우 슬러지수의 pH를 높여주어 콘크리트 분말원료의 수화 반응을 촉진 하여 콘크리트 조직을 치밀하게 하여 성능향상이 가능할 것이다. 본 연구에서는 레미콘 회수수에 CaO원 산업부산물 중 하나인 탈황석고를 혼입하여 제조된 활성슬러지의 효과를 확인하기 위하여 시멘트 경화체 및 모르타르의 특성을 분석하였다. 그 결과 시멘트 경화체의 경우 응결시간 단축 및 높은 안정성을 나타내었으며, 기기분석을 통해 수화반응이 촉진되었음을 확인할 수 있었다. 또한 활성 슬러지 제조를 위하여 CaO원으로서 사용된 탈황석고는 단위수량을 조절할 경우 작업성을 확보할 수 있을 뿐만 아니라 적절하게 혼입 될 경우 시멘트 사용량이 줄더라도 높은 강도 발현을 나타내는 것을 확인할 수 있었다.

Keywords

References

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