The theory of granular packings for coarse soils

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Resumen

Coarse soils are substances made of grains of different shape, size and orientation. In this paper, new massive-measurable grain indexes are defined to develop a simple and systematic theory for the ideal packing of grains. First, a linear relationship between an assemblage of monodisperse spheres and an assemblage of polydisperse grains is deduced. Then, a general formula for the porosity of linearly ordered packings of spheres in contact is settled down by the appropriated choosing of eight neighboring spheres located at the vertices of the unit parallelepiped. The porosity of axisymmetric packings of grains, related to sand piles and axisymmetric compression tests, is proposed to be determined averaging the respective linear parameters. Since they can be tested experimentally, porosities of the densest state and the loosest state of a granular soil can be used to verify the accuracy of the present theory. Diagrams for these extreme quantities show a good agreement between the theoretical lines and the experimental data, no matter the dependency on the protocols and mineral composition.

Idioma originalInglés
Título de la publicación alojadaPowders and Grains 2013 - Proceedings of the 7th International Conference on Micromechanics of Granular Media
Páginas341-344
Número de páginas4
DOI
EstadoPublicada - 2013
Evento7th International Conference on Micromechanics of Granular Media: Powders and Grains 2013 - Sydney, NSW, Australia
Duración: 8 jul. 201312 jul. 2013

Serie de la publicación

NombreAIP Conference Proceedings
Volumen1542
ISSN (versión impresa)0094-243X
ISSN (versión digital)1551-7616

Conferencia

Conferencia7th International Conference on Micromechanics of Granular Media: Powders and Grains 2013
País/TerritorioAustralia
CiudadSydney, NSW
Período8/07/1312/07/13

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