Consolidation of a geosynthetic clay liner under isotropic states of stress / Jong-Beom Kang in Journal of geotechnical and geoenvironmental engineering, Vol. 136 N° 1 (Janvier 2010)  

Public ISBD [article]  inJournal of geotechnical and geoenvironmental engineering > Vol. 136 N° 1 (Janvier 2010) . - pp. 253-259 Titre : Consolidation of a geosynthetic clay liner under isotropic states of stress Type de document : texte imprimé Auteurs : Jong-Beom Kang, Auteur ; Charles D. Shackelford, Auteur Article en page(s) : pp. 253-259 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Compressibility Consolidation Geosynthetic clay liner Hydraulic conductivity Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : The consolidation behavior of a geosynthetic clay liner (GCL) was evaluated by consolidating duplicate specimens of the GCL in a flexible-wall cell to a final effective stress, sigma[prime], of 241 kPa (35.0 psi). The hydraulic conductivity, k, also was measured at the end of each loading increment. The results indicated that the GCL was normally consolidated for values of sigma[prime] greater than 34.5 kPa (5.0 psi), which correlates well with limited consolidation data reported in the literature for GCLs based on confined compression using oedometers. Values of the coefficient of consolidation, cv, for the GCL ranged from 5.2×10−10 m2/s to 2.1×10−9 m2/s, and generally decreased with increasing sigma[prime], albeit only slightly. Values of the measured k, kmeasured, for the GCL were low ( DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JGGEFK&ONLINE=YES&s [...] [article] Consolidation of a geosynthetic clay liner under isotropic states of stress [texte imprimé] / Jong-Beom Kang, Auteur ; Charles D. Shackelford, Auteur . - pp. 253-259. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 1 (Janvier 2010) . - pp. 253-259 Mots-clés : Compressibility Consolidation Geosynthetic clay liner Hydraulic conductivity Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : The consolidation behavior of a geosynthetic clay liner (GCL) was evaluated by consolidating duplicate specimens of the GCL in a flexible-wall cell to a final effective stress, sigma[prime], of 241 kPa (35.0 psi). The hydraulic conductivity, k, also was measured at the end of each loading increment. The results indicated that the GCL was normally consolidated for values of sigma[prime] greater than 34.5 kPa (5.0 psi), which correlates well with limited consolidation data reported in the literature for GCLs based on confined compression using oedometers. Values of the coefficient of consolidation, cv, for the GCL ranged from 5.2×10−10 m2/s to 2.1×10−9 m2/s, and generally decreased with increasing sigma[prime], albeit only slightly. Values of the measured k, kmeasured, for the GCL were low ( DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JGGEFK&ONLINE=YES&s [...]

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Membrane behavior of compacted clay liners / Jong-Beom Kang in Journal of geotechnical and geoenvironmental engineering, Vol. 136 N° 10 (Octobre 2010)  

Public ISBD [article]  inJournal of geotechnical and geoenvironmental engineering > Vol. 136 N° 10 (Octobre 2010) . - pp. 1368-1382 Titre : Membrane behavior of compacted clay liners Type de document : texte imprimé Auteurs : Jong-Beom Kang, Auteur ; Charles D. Shackelford, Auteur Année de publication : 2010 Article en page(s) : pp. 1368-1382 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Bentonite Clay liners Compacted soils Seepage Chemico-osmosis membranes Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : The containment function of clay barriers used for waste containment applications (e.g., landfills) can be enhanced if such clays exhibit membrane behavior or the ability to restrict the migration of solutes (e.g., contaminants). In this regard, compacted specimens of a locally available natural clay known as Nelson Farm Clay (NFC), as well as NFC amended with 5% (dry weight) sodium bentonite, were evaluated for hydraulic conductivity, k, and the potential for membrane behavior. The membrane efficiencies of specimens of both soils compacted such that k was less than 10−7 cm/s were measured by establishing steady salt (KCl) concentration differences, −DeltaCo, ranging from 3.9 to 47 mM across the specimens in a flexible-wall cell under closed-system boundary conditions. The measured membrane efficiency for the unamended NFC was negligible (i.e., DEWEY : 624.1 ISSN : 1090-1241 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JGGEFK&ONLINE=YES&s [...] [article] Membrane behavior of compacted clay liners [texte imprimé] / Jong-Beom Kang, Auteur ; Charles D. Shackelford, Auteur . - 2010 . - pp. 1368-1382. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 10 (Octobre 2010) . - pp. 1368-1382 Mots-clés : Bentonite Clay liners Compacted soils Seepage Chemico-osmosis membranes Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : The containment function of clay barriers used for waste containment applications (e.g., landfills) can be enhanced if such clays exhibit membrane behavior or the ability to restrict the migration of solutes (e.g., contaminants). In this regard, compacted specimens of a locally available natural clay known as Nelson Farm Clay (NFC), as well as NFC amended with 5% (dry weight) sodium bentonite, were evaluated for hydraulic conductivity, k, and the potential for membrane behavior. The membrane efficiencies of specimens of both soils compacted such that k was less than 10−7 cm/s were measured by establishing steady salt (KCl) concentration differences, −DeltaCo, ranging from 3.9 to 47 mM across the specimens in a flexible-wall cell under closed-system boundary conditions. The measured membrane efficiency for the unamended NFC was negligible (i.e., DEWEY : 624.1 ISSN : 1090-1241 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JGGEFK&ONLINE=YES&s [...]

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