HYDRAULIC CONDUCTIVITY OF NONPREHYDRATED GEOSYNTHETIC CLAY LINERS PERMEATED WITH INORGANIC SOLUTIONS AND WASTE LEACHATES

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概要

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• To investigate systematically the effects of electrolytic solutions on the barrier performance of geosynthetic clay liners (GCLs), a long-term hydraulic conductivity test for 3 years at longest was conducted on a nonprehydrated GCL permeated with inorganic chemical solutions. The hydraulic conductivity test for waste leachates was also conducted. The results of the test show that the hydraulic conductivity of GCLs significantly correlates with the swelling capacity of bentonite contained in GCLs. GCLs have excellent barrier performance of k<1.0×10^<-8>cm/s when the free swell is larger than 15mL/2 g-solid regardless of the type and concentration of the permeant solution. In addition, when the results of the hydraulic conductivity test with chemical inorganic solutions were compared to those with waste leachates, the hydraulic conductivity of GCL permeated with chemical solution was almost the same within the electric conductivity of 0-25S/m as that permeated with waste leachate having similar electric conductivity. The hydraulic conductivity of GCLs to be used in landfill bottom liners can be estimated by the hydraulic conductivity values obtained from the experiment using chemical solutions having the similar electric conductivity values, if the chemical solution had the electric conductivity within=25S/m.

• 社団法人地盤工学会の論文

著者

• Ogawa Atsushi

  Department of Pediatrics, School of Medicine, Fukuoka University

• KATSUMI TAKESHI

  Graduate School of Global Environmental Studies, Kyoto University

• YOSHIKAWA Kunihiko

  Department of Dermatology, Osaka University School of Medicine

• Katsumi Takeshi

  Graduate School Of Global Environmental Studies Kyoto University

• ISHIMORI HIROYUKI

  Department of Civil Engineering, Ritsumeikan University

• FUKAGAWA RYOICHI

  Department of Civil Engineering, Ritsumeikan University

• HANAMOTO KAZUYOSHI

  Department of Civil Engineering, Ritsumeikan University

• Ogawa Atsushi

  Department Of Biological Production Akita Prefectural University

• Yoshikawa Kunihiko

  Department Of Civil Engineering Ritsumeikan University:(present Office)nippo Co. Ltd.

• Fukagawa Ryoichi

  Department Of Civil Engineering Ritsumeikan University

• Fukagawa Ryoichi

  Department Of Civil And Ocean Engineering Faculty Of Engineering Ehime University

• Ishimori Hiroyuki

  Department Of Civil Engineering Ritsumeikan University

• Hanamoto Kazuyoshi

  Department Of Civil Engineering Ritsumeikan University:(present Office)wesco Co. Ltd.

• Ogawa Atsushi

  Department Of Civil Engineering Ritsumeikan University

• Ogawa Atsushi

  Department Of Applied Physics Faculty Of Engineering Fukui University

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