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contributor authorStefania Gobbi
contributor authorMaria Paola Santisi d’Avila
contributor authorLuca Lenti
contributor authorJean-François Semblat
contributor authorPhilippe Reiffsteck
date accessioned2022-05-07T21:08:19Z
date available2022-05-07T21:08:19Z
date issued2022-1-1
identifier other(ASCE)GM.1943-5622.0002242.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4283368
description abstractThe mechanical behavior of binary granular mixtures strongly depends on their initial packing density, stress level, fine content, particle size distribution, mineralogy, and shape. This research aims to investigate the effect on the mechanical behavior of fine-sand mixtures of fine particle fraction through various features: grain size distribution, fine particle size, and plasticity. The concept of equivalent intergranular void ratio is proposed for this analysis. It is correlated to the micromechanical activation of fines within the sand matrix. Monotonic consolidated undrained triaxial tests are carried out for mixtures of coarse particles (sand) and fine particles (silt or clay), in the sand dominant behavior, having various shapes and grain-size distributions. Loose, medium, and dense mixtures are tested using different fine contents and confining pressures. The undrained response is strongly affected by particle interactions, depending on the packing density, particle size, and plasticity. The active fine fraction captures the active contribution of fine particles in the sand skeleton structure. It influences the equivalent intergranular void ratio estimated in these experiments and associated to the steady state of mixtures. The reliability of equivalent state theory and an original formula proposed to estimate the active fine fraction is demonstrated in the case of fine-sand mixtures having plastic fine particles and confirmed for non-plastic fines.
publisherASCE
titleEffect of Active Plastic Fine Fraction on Undrained Behavior of Binary Granular Mixtures
typeJournal Paper
journal volume22
journal issue1
journal titleInternational Journal of Geomechanics
identifier doi10.1061/(ASCE)GM.1943-5622.0002242
journal fristpage06021035
journal lastpage06021035-13
page13
treeInternational Journal of Geomechanics:;2022:;Volume ( 022 ):;issue: 001
contenttypeFulltext


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