Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Evaluation on Field Application of Controlled Low-Strength Materials Made of Coal Ash in Reclamation Site

석탄회를 활용한 저강도고유동화재의 공유수면매립현장에 대한 적용성 평가

  • Kong, Jin-Young (Dept. of Cvil & Environmental Engineering, Hanyang Univ.) ;
  • Jung, Hyuk-Sang (Korea Railroad Research Institute) ;
  • Cho, Sam-Deok (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Kim, Ju-Hyong (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Hyun, Jae-Hyuk (Dept. of Environmental Engineering, Chungnam National Univ.) ;
  • Chun, Byung-Sik (Dept. of Cvil & Environmental Engineering, Hanyang Univ.)
  • 공진영 (한양대학교 건설환경공학과) ;
  • 정혁상 (한국철도기술연구원 신교통인프라연구실) ;
  • 조삼덕 (한국건설기술연구원 지반연구실) ;
  • 김주형 (한국건설기술연구원 지반연구실) ;
  • 현재혁 (충남대학교 환경공학과) ;
  • 천병식 (한양대학교 건설환경공학과)
  • Received : 2011.11.10
  • Accepted : 2012.11.27
  • Published : 2012.12.31
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Abstract

This paper presented the strength and environmental characteristics of reclaimed-ground filled with controlled low-strength materials (CLSM) made of coal ash, small amounts of cement, and water in a reclamation site and evaluated the possibility of the use of coal ash on reclamation materials for beneficial use. Three-month period of SPT, CPT, environmental effects evaluation etc. were conducted. N values and cone resistances in ground filled with CLSM were greater than or similar to those in dredging sand. In case of land filled with coal ash except cement these values were lower than those in dredging sand. The results of soil and seawater pollution were lower than test criteria without high pH. Also the values of PH test were measured between pH 5.0~9.0, the criteria of industrial water in the Law for the Underground Water of Korea.

본 연구에서는 석탄회를 주재료로 하고 시멘트와 물을 혼합한 저강도고유동화재(CLSM)를 개발하여 공유수면매립용으로 사용하고자 ${\bigcirc}{\bigcirc}$매립공사현장에서 현장매립실험을 실시하였고, 저강도고유동화재로 매립된 지반의 강도 및 환경적 특성을 분석하였다. 약 3개월에 걸쳐 표준관입시험, 콘관입시험, 환경영향평가 등을 실시하였다. 실험결과 저강도고유동화재 매립지반의 N값, 관입저항력값은 원지반보다 더 크거나 비슷하게 나타났으며, 석탄회 매립지반의 경우 원지반보다 낮았다. 토양 및 해수오염도를 평가한 결과 pH를 제외하고는 토양오염도와 해수오염도에서 요구하는 시험항목의 기준값보다 낮게 나타났다. pH의 경우도 지하수법에서 정하는 공업용수 기준 pH 5.0~9.0 이내를 만족하였다.

Keywords

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