The Compatibility of Slurry Wall Materials with Leachate for Cut -off of Contaminated Sites

오염지역 차폐용 슬러리월 재료와 침출수의 반응 특성

  • 이용수 (정회원, 한국건설기술연구원 지반연구실 연구원) ;
  • 정하익 (정회원, 한국건설기술연구원 지반연구실)
  • Published : 1997.04.01

Abstract

Cut-off methods of controlling leachate migration from waste landfills and contaminated sites are studied. Permeability and chemical compatibility tests are prrforlned on slurry wall materials including soil-bentonite, cement-bentonite, cement / fly ash-bentonite, plastic concrete. Hydraulic conductivity of soil-bentonite mixture is the lowest of these four bacuill materials. The leachate from municipal solid waste has little influence on the permeability of the backfill materials. The bentonite slurry becomes flocculated and aggregated when exposed to the leachate. The results of the permeability test showed that the hydraulic conductivities of the backfill materials are in the order soil-beiltonite, Plastic concrete, cement-bentonite. And the result c: the compatibility test showed increase in permeability due to the effects of leachate. Thus, in designing the slurry wall it is essential to check the behaviour of the bentonite slurry and backfill materials on the compatibility with the contaminants.

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