Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Effect of Gypsum on Hydration Properties of Natural Hydraulic Lime

천연 수경성 석회의 수화특성에 미치는 석고의 영향

  • Moon, Ki-Yeon (Korea Institute of Limestone and Advanced Materials) ;
  • Choi, Moon-Kwan (Korea Institute of Limestone and Advanced Materials) ;
  • Cho, Kye-Hong (Korea Institute of Limestone and Advanced Materials) ;
  • Cho, Jin-Sang (Korea Institute of Limestone and Advanced Materials) ;
  • Ahn, Ji-Whan (Korea Institute of Geoscience and Mineral Resources) ;
  • Hong, Chang-Woo (Department of Civil Engineering, Korea National University of Transportation)
  • 문기연 (한국석회석신소재연구소 연구개발실) ;
  • 최문관 (한국석회석신소재연구소 연구개발실) ;
  • 조계홍 (한국석회석신소재연구소 연구개발실) ;
  • 조진상 (한국석회석신소재연구소 연구개발실) ;
  • 안지환 (한국지질자원연구원 광물자원연구본부) ;
  • 홍창우 (한국교통대학교 토목공학과)
  • Received : 2014.12.03
  • Accepted : 2015.01.22
  • Published : 2015.02.28
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Abstract

In this study, change of hydration property with contents and type of gypsum in ternary natural hydraulic lime containing blast furnace slag and gypsum was investigated. Anhydrite, hemihydrate and dihydrate were added 3 % and 10 %, respectively in natural hydraulic lime adding blast furnace slag 20 %. Hydration and physical behavior due to solubility and reactivity of different types of gypsum were analyzed in early hydration. As a result of analysis of hydration properties, in all samples, hydrates such as ettringite and C-S-H were produced in early hydration, and amount of hydrates with increase of hydration time was increased. In the case of compressive strength, when contents of gypsum are 3 %, it was higher compressive strength than other specimens. At hydration 28 days, for addition of anhydrite and hemihydrate, compressive strength was more than adding dihydrate.

본 연구에서는 고로 수쇄 슬래그 및 석고를 혼합한 3성분계 천연 수경성 석회 페이스트에서 석고종류 및 혼합량에 따른 수화특성 변화를 확인하고자 하였다. 고로 수쇄 슬래그 20 %를 혼합한 천연 수경성 석회에 무수석고, 반수석고, 이수석고를 각각 3 %, 10%를 혼합하여 석고의 용해도 및 반응성에 따라 수화초기 생성되는 수화물의 종류와 생성량을 분석하였으며, 이에 따른 물리적 특성 변화거동에 대하여 조사하였다. 페이스트를 활용한 수화특성 결과 모든 샘플에서 수화초기 ettringite, C-S-H와 같은 수화물이 생성되었으며, 재령이 길어짐에 따라 수화물의 생성량이 증가하였다. 압축강도 측정결과, 석고 혼합량이 3 %일 때 더 높은 강도를 보였으며 재령 28일에서 무수석고 및 반수석고가 이수석고를 혼입할 경우 보다 높은 특성을 나타내었다.

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References

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