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Evaluation of the flow pump and constant head techniques for permeability measurements / S. A. Aiban in Géotechnique, Vol. 39 N°4 (Decembre 1989) 

Public ISBD [article]  in Géotechnique > Vol. 39 N°4 (Decembre 1989) . - pp. 655 –666 Titre : Evaluation of the flow pump and constant head techniques for permeability measurements Type de document : texte imprimé Auteurs : S. A. Aiban, Auteur ; D. Znidarčić, Auteur Année de publication : 2007 Article en page(s) : pp. 655 –666 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Seepage  Clays  Laboratory  equipment  Silts  Permeability Résumé : This paper presents a comparison between the constant head and flow pump experimental techniques for evaluating the permeability of soils. The specimens used in both methods were prepared in the laboratory under controlled conditions to ensure repeatable results. A conventional triaxial cell was used to confine the samples, and full saturation of the specimens was ensured by applying a constant level of back pressure. Accurate flow (inflow and outflow) measurements were obtained using precision burettes and a calibrated flow pump with known flow rates. Fine and coarse materials were tested under different conditions, and effects of different variables including void ratio, hydraulic gradient, specimen size and soil type were studied using the two methods. Experimental procedure, equipment and findings are presented. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.4.655 [article] Evaluation of the flow pump and constant head techniques for permeability measurements [texte imprimé] / S. A. Aiban, Auteur ; D. Znidarčić, Auteur . - 2007 . - pp. 655 –666. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°4 (Decembre 1989) . - pp. 655 –666 Mots-clés : Seepage  Clays  Laboratory  equipment  Silts  Permeability Résumé : This paper presents a comparison between the constant head and flow pump experimental techniques for evaluating the permeability of soils. The specimens used in both methods were prepared in the laboratory under controlled conditions to ensure repeatable results. A conventional triaxial cell was used to confine the samples, and full saturation of the specimens was ensured by applying a constant level of back pressure. Accurate flow (inflow and outflow) measurements were obtained using precision burettes and a calibrated flow pump with known flow rates. Fine and coarse materials were tested under different conditions, and effects of different variables including void ratio, hydraulic gradient, specimen size and soil type were studied using the two methods. Experimental procedure, equipment and findings are presented. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.4.655