Influence of mineral composition on the simple shear response of sands / Julio R. Valdes in Journal of geotechnical and geoenvironmental engineering, Vol. 134 n°12 (Décembre 2008)  

Public ISBD [article]  inJournal of geotechnical and geoenvironmental engineering > Vol. 134 n°12 (Décembre 2008) . - pp. 1820–1824 Titre : Influence of mineral composition on the simple shear response of sands : experimental study Type de document : texte imprimé Auteurs : Julio R. Valdes, Auteur ; Selene L. Leleu, Auteur Année de publication : 2009 Article en page(s) : pp. 1820–1824 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Sand Crushing Dilatancy Granular materials Laboratory tests Mineralogy Shear deformation Résumé : Experiments were conducted to evaluate the role of mineral composition on the direct simple shear response (i.e., volume change during shear) of uniform sands composed of “strong” quartz grains and “weak” calcareous grains. The dry specimens were loaded in a custom-made direct simple shear apparatus and separated after testing with respect to grain size by sieving and with respect to mineral composition by dissolving the calcareous grains retained on each sieve. The results indicate that the presence of weak grains affects the direct simple shear response of predominately strong-grained sands: at low stresses, the response is controlled by particle shape; at high stresses, the response is controlled by weak particle breakage. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A12%281 [...] [article] Influence of mineral composition on the simple shear response of sands : experimental study [texte imprimé] / Julio R. Valdes, Auteur ; Selene L. Leleu, Auteur . - 2009 . - pp. 1820–1824. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 134 n°12 (Décembre 2008) . - pp. 1820–1824 Mots-clés : Sand Crushing Dilatancy Granular materials Laboratory tests Mineralogy Shear deformation Résumé : Experiments were conducted to evaluate the role of mineral composition on the direct simple shear response (i.e., volume change during shear) of uniform sands composed of “strong” quartz grains and “weak” calcareous grains. The dry specimens were loaded in a custom-made direct simple shear apparatus and separated after testing with respect to grain size by sieving and with respect to mineral composition by dissolving the calcareous grains retained on each sieve. The results indicate that the presence of weak grains affects the direct simple shear response of predominately strong-grained sands: at low stresses, the response is controlled by particle shape; at high stresses, the response is controlled by weak particle breakage. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A12%281 [...]

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