Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Characterization of Controlled Low-Strength Materials Utilizing CO2-Solidified CFBC Coal Ash

CO2 고정화된 CFBC 석탄재를 활용한 저강도 고유동 채움재의 특성평가

  • 조용광 (한일시멘트 테크니컬센터) ;
  • 남성영 (한일시멘트 테크니컬센터) ;
  • 이용무 (한일시멘트 테크니컬센터) ;
  • 김춘식 (한일시멘트 테크니컬센터) ;
  • 서신석 (한일시멘트 테크니컬센터) ;
  • 조성현 (한일시멘트 테크니컬센터) ;
  • 이형우 (한일시멘트 테크니컬센터) ;
  • 안지환 (한국지질자원연구원 탄소광물화사업단)
  • Received : 2017.09.26
  • Accepted : 2017.10.24
  • Published : 2017.11.30
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Abstract

A Controlled Low-Strength Materials (CLSM) is suitable for mine backfilling because it does not require compaction owing to it high fluidity and can be installed quickly. Therefore, a CLSM utilizing $CO_2$-solidified Circulating Fluidzed Bed Combustion (CFBC) coal ash was developed and it's properties were investigated, since. $CO_2$-solidification of CFBC coal ash can inhibit exudation of heavy metals. The chemical composition and specific surface area of Pulverized coal Combustion fly ash and CFBC fly ash were analyzed. The water ratio, compressive strength and length change ratio of CLSM were confirmed. The water ratios differed with the specific surface area of the CLSM. It was confirmed that the porosity of CLSM affected its compressive strength and length change ratio.

Keywords

References

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