Permeability Characteristics of Sand- Bentonite Mixtures

  • 발행 : 1997.04.01

초록

Abstract A series of permeability tests was performed on the mixtures with specific mixing rates of sand and bentonite using modified rigid-wall permeameter. Sand-bentonite mixtures were permeated by organics, ethanol and TCE. Permeability of bentonite with several mixing rates had a tendency to decrease up to initial one pore volume and permeability was thereafter converged to a constant value. When sand-bentonite mixtures was permeated by water, permeability was decreased at the beginning but it was thereafter converged to a constant. Among several mixing rates, permeability was greatly decreased at 15% of mixing rate. When sand-bentonite mixtures with 15% mixing rate was permeated by ethanol, permeability was about 10 times larger value than permeability of water. Peameability was shown greater values when permeated by TCE (TrichloroEthylene) followed by ethanol. Suitable mixing rate of sand-bentonite for a liner of waste landfills was detected.

키워드

참고문헌

  1. J. of the Korean Geot. Soc. v.9 no.3 Analysis of Chemical Compatiblility of Leachates with liner materials in the Waste Landfillls Chung,H.;Y.Jang
  2. Criteria fro Site Selection of Waste Dump Sites Namgung,W.
  3. Code of Waste Management Institute of Korean Laws
  4. Proc. of the 1st Int. Congress on Environmental Geotechnics Geotechnical properties of a clay contaminated with an organic chemical Al-Tabbas,A.;S.Walsh
  5. Design constuction, and monitoring of sanitary landfill Bagchi,A.
  6. Can. Geotech. J. v.28 The permeability of soils with organic fluids Budhu,M.;R.F.Giesse;G.Campbell;L.Baumagass
  7. Can. Geotech. J. v.25 Viscosity and dieletric constant controls on the hydraule conductivity of clayey soils permaated with water-soluble organics Budhu,M.;R.F.Giesse;G.Campbell;L.Baumagass
  8. Soil Mechanics Lambe,T.W.;R.V.Whitaman
  9. Handbook of chemistry Lange,N.A.
  10. Proc. of 11th Southeast Asian Geotech. Conference Effect of waste leachate on permeability of compacted clay Lin,P.S.;C.W.Chang
  11. Clay and clay minerals Mechanism controlling the permeability of clays Mesri,G.;R.E.olson
  12. Geotech. practice for waste disposal 87 no.46 Chemical effcts on clay hydraulic conductivity Mitchell,J.K.;F.T.Madsen
  13. J. of Geotech. Eng. Div. v.113 no.12 Hydraulic conductivity of comaqcted clay to dilude oganic chemicals Bowders,J.J.;D.E.Daniel
  14. Advanced Soil Physics W.L.Powers;Don Kirkham