[article] 
inJournal of geotechnical and geoenvironmental engineering > Vol. 135 N° 5 (Mai 2009) . - pp. 635–646

Titre :	Identification and description of soils containing very coarse fractions
Type de document :	texte imprimé
Auteurs :	Fred H. Kulhawy, Auteur ; Jie-Ru Chen, Auteur
Année de publication :	2009
Article en page(s) :	pp. 635–646
Note générale :	Geotechnical and geoenvironmental engineering
Langues :	Anglais (eng)
Mots-clés :	Soil classification Grain size Coarse-grained soils properties
Résumé :	Current practices are reviewed for the identification, description, and classification of soils containing significant very coarse fractions. The review shows that there are serious shortcomings when these fractions are present. To upgrade current practices, improvements are needed in two areas: (1) the grain-size scale and nomenclature; and (2) the basic system for soil identification. First, an improved grain-size scale is proposed that clarifies the very coarse fractions and other nomenclature. Second, it is shown that current U.S. classification systems can not address the very coarse soils adequately, and they can not be adapted easily to do so. However, a relatively straightforward expansion can be made to the Burmister identification system to incorporate these soils. This Expanded Burmister Soil Identification System is flexible enough to describe and identify soils, ranging from very coarse to very fine, in a complete and consistent manner. Adoption of these two recommendations can improve practice and reduce current ambiguities in dealing with soils containing very coarse fractions.
En ligne :	http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282009%29135%3A5%2863 [...]

[article] Identification and description of soils containing very coarse fractions [texte imprimé] / Fred H. Kulhawy, Auteur ; Jie-Ru Chen, Auteur . - 2009 . - pp. 635–646.
Geotechnical and geoenvironmental engineering
Langues : Anglais (eng)
in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N° 5 (Mai 2009) . - pp. 635–646

Mots-clés :	Soil classification Grain size Coarse-grained soils properties
Résumé :	Current practices are reviewed for the identification, description, and classification of soils containing significant very coarse fractions. The review shows that there are serious shortcomings when these fractions are present. To upgrade current practices, improvements are needed in two areas: (1) the grain-size scale and nomenclature; and (2) the basic system for soil identification. First, an improved grain-size scale is proposed that clarifies the very coarse fractions and other nomenclature. Second, it is shown that current U.S. classification systems can not address the very coarse soils adequately, and they can not be adapted easily to do so. However, a relatively straightforward expansion can be made to the Burmister identification system to incorporate these soils. This Expanded Burmister Soil Identification System is flexible enough to describe and identify soils, ranging from very coarse to very fine, in a complete and consistent manner. Adoption of these two recommendations can improve practice and reduce current ambiguities in dealing with soils containing very coarse fractions.
En ligne :	http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282009%29135%3A5%2863 [...]