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Estimating hydraulic and thermal conductivities of crushed granite using porosity and equivalent particle size / Jean Côté in Journal of geotechnical and geoenvironmental engineering, Vol. 137 N° 9 (Septembre 2011) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 9 (Septembre 2011) . - pp. 834-842 Titre : Estimating hydraulic and thermal conductivities of crushed granite using porosity and equivalent particle size Type de document : texte imprimé Auteurs : Jean Côté, Auteur ; Marie-Hélène Fillion, Auteur ; Konrad, Jean-Marie, Auteur Année de publication : 2012 Article en page(s) : pp. 834-842 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Thermal  properties  Hydraulic  properties  Crushed  rock  Porosity  Particle  size  Saturated  Dry Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : This paper presents an experimental study of the effect of porosity and particle size on the hydraulic conductivity and thermal conductivity of sand-sized crushed granite particles with diameters ranging from 0.08–10 mm. The results show that the hydraulic conductivity varies with particle size and porosity, but thermal conductivity varies primarily with porosity. Estimating methods found in the literature are used in an attempt to predict the measured hydraulic and thermal conductivities of the crushed granite materials. The results show that the hydraulic conductivity model of Chapuis generally yields accurate estimated values for d102n3/(1-n)2 larger than 0.01  mm2. Below this critical point, the estimating method progressively yields larger values of hydraulic conductivity. A new set of empirical parameters are proposed to extend the use of this method to crushed granite materials at low d102n3/(1-n)2 values. It is also shown that predicted thermal conductivity values obtained with the Côté and Konrad model agree well with the experimental data. Issues regarding the extension of the models to coarser materials are discussed. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i9/p834_s1?isAuthorized=no [article] Estimating hydraulic and thermal conductivities of crushed granite using porosity and equivalent particle size [texte imprimé] / Jean Côté, Auteur ; Marie-Hélène Fillion, Auteur ; Konrad, Jean-Marie, Auteur . - 2012 . - pp. 834-842. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 9 (Septembre 2011) . - pp. 834-842 Mots-clés : Thermal  properties  Hydraulic  properties  Crushed  rock  Porosity  Particle  size  Saturated  Dry Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : This paper presents an experimental study of the effect of porosity and particle size on the hydraulic conductivity and thermal conductivity of sand-sized crushed granite particles with diameters ranging from 0.08–10 mm. The results show that the hydraulic conductivity varies with particle size and porosity, but thermal conductivity varies primarily with porosity. Estimating methods found in the literature are used in an attempt to predict the measured hydraulic and thermal conductivities of the crushed granite materials. The results show that the hydraulic conductivity model of Chapuis generally yields accurate estimated values for d102n3/(1-n)2 larger than 0.01  mm2. Below this critical point, the estimating method progressively yields larger values of hydraulic conductivity. A new set of empirical parameters are proposed to extend the use of this method to crushed granite materials at low d102n3/(1-n)2 values. It is also shown that predicted thermal conductivity values obtained with the Côté and Konrad model agree well with the experimental data. Issues regarding the extension of the models to coarser materials are discussed. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i9/p834_s1?isAuthorized=no