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Hydraulic conductivity changes of a low-plasticity till subjected to freeze–thaw cycles / J.-M. Konrad in Géotechnique, Vol. 60 N° 9 (Septembre 2010) 

Public ISBD [article]  in Géotechnique > Vol. 60 N° 9 (Septembre 2010) . - pp. 679–690 Titre : Hydraulic conductivity changes of a low-plasticity till subjected to freeze–thaw cycles Type de document : texte imprimé Auteurs : J.-M. Konrad, Auteur Année de publication : 2011 Article en page(s) : pp. 679–690 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Compaction  Glacial  soils  Ground  freezing  Laboratory  tests Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper examines the influence of several freeze–thaw cycles on the hydraulic conductivity changes of a glacial till from Péribonka in Quebec, Canada. Samples reconstituted by consolidation of a slurry and by compaction at dry of optimum conditions were subjected to closed freezing and thaw as well as constant-head permeability tests. For saturated consolidated samples, the relationship between the logarithm of hydraulic conductivity and void ratio was linear for both unfrozen and thawed states. At a given void ratio, the increase of the hydraulic conductivity of the thawed soil was larger for compacted and unsaturated samples than for saturated consolidated samples. Actual freeze–thaw-induced hydraulic conductivity changes, however, may be offset by a decrease in void ratio during thaw consolidation. A general framework considering void ratio, water content, stress and hydraulic conductivity relationships is presented for Péribonka glacial till. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.08.p.020 [article] Hydraulic conductivity changes of a low-plasticity till subjected to freeze–thaw cycles [texte imprimé] / J.-M. Konrad, Auteur . - 2011 . - pp. 679–690. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 60 N° 9 (Septembre 2010) . - pp. 679–690 Mots-clés : Compaction  Glacial  soils  Ground  freezing  Laboratory  tests Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper examines the influence of several freeze–thaw cycles on the hydraulic conductivity changes of a glacial till from Péribonka in Quebec, Canada. Samples reconstituted by consolidation of a slurry and by compaction at dry of optimum conditions were subjected to closed freezing and thaw as well as constant-head permeability tests. For saturated consolidated samples, the relationship between the logarithm of hydraulic conductivity and void ratio was linear for both unfrozen and thawed states. At a given void ratio, the increase of the hydraulic conductivity of the thawed soil was larger for compacted and unsaturated samples than for saturated consolidated samples. Actual freeze–thaw-induced hydraulic conductivity changes, however, may be offset by a decrease in void ratio during thaw consolidation. A general framework considering void ratio, water content, stress and hydraulic conductivity relationships is presented for Péribonka glacial till. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.08.p.020