Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Evaluation of Mechanical Properties of Mortar Mixed with Zeolites and Active Hwangtoh

제올라이트 및 활성 황토를 혼입한 모르타르의 역학적 특성 평가

  • Kwon, Seung-Jun (Department of Civil and Environmental Engineering, Hannam University) ;
  • Lim, Hee-Seob (Department of Civil and Environmental Engineering, Hannam University) ;
  • Kim, Hyeok-Jung (Industry-Academic Cooperation Foundation, Hankyong National University) ;
  • Hyun, Jung-Hwan (Industry-Academic Cooperation Foundation, Hankyong National University)
  • 권성준 (한남대학교 토목환경공학과) ;
  • 임희섭 (한남대학교 토목환경공학과) ;
  • 김혁중 (한경대학교 산학협력단) ;
  • 현정환 (한경대학교 산학협력단)
  • Received : 2019.11.07
  • Accepted : 2019.12.24
  • Published : 2019.12.30
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Abstract

In this study, the physical and chemical properties of mortar are evaluated by micro-analysis, taking into account the substitution rate(20%, 30%, and 40%) of zeolite with porous properties and active hwangtoh. First, the physical and chemical properties of zeolite and active hwangtoh are reviewed to confirm that the specific surface area of those is similar with ordinary portland cement, and the main chemical composition is SiO2, Al2O3, Fe2O3, etc.. So, it is thought that they have the properties of pozolan reactive materials. As the results of the strength test considering the amount of substitution based on that of cement, It is confirmed that strength decreases with the increase of the replacement amount of zeolite and active hwangtoh, and the strength of mortar with replacement rate of 20% is higher than OPC mortar. It is confirmed that the amount of porosity is increased due to chemical properties of zeolite and active hwangtoh, and in particular, the size of the pore is greater than 1㎛ in mortar mixed with active hwangtoh.

본 연구에서는 다공성 특성을 갖는 제올라이트와 활성 황토를 대상으로 시멘트 대체 혼화재로 20%, 30%, 40%로 치환하여 모르타르의 물리적 특성 및 미세 분석을 통한 화학적 특성을 평가하였다. 먼저, 제올라이트 및 활성 황토 재료의 물리적, 화학적 특성을 검토한 결과 시멘트의 비표면적이 비슷함을 확인 할 수 있었으며, 주요 화학 조성이 SiO2, Al2O3, Fe2O3 등으로 나타남에 따라 포졸란 반응성 재료의 특성을 갖는 것을 확인하였다. 시멘트 대비 치환량에 따른 강도시험 결과 제올라이트 및 활성 황토의 치환량 증가에 따라 강도는 저감하는 것을 확인 하였으며, 20% 치환 배합에서는 OPC 대비 강도 발현이 높은 것을 확인하였다. 미세분석 실험을 통해 제올라이트 및 활성 황토의 화학 특성으로 공극량이 증가함을 확인하였으며, 특히 활성 황토를 혼입한 모르타르에서는 공극크기가 1㎛ 이상이 다량 발생하였다.

Keywords

References

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