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Role of Particle Angularity on the Mechanical Behavior of Granular Mixtures

Shin, H. / Santamarina, J. C.

Abstract

Particle shape affects the mechanical behavior of soils, including packing density, stiffness, volume change during shear, and strength. Laboratory experiments conducted to study the mechanical response of sand mixtures made of round and angular grains show an increase in void ratio, small strain shear modulus $G_{max}$ (constant fabric), oedometric compressibility $C_{C}$ (fabric changes), and friction angle but a decrease in lateral stress coefficient $k_{0}$ as the mass fraction of angular particles increases. These results reflect variations in particle mobility and highlight the relative role of contact stiffness versus fabric changes.

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Role of Particle Angularity on the Mechanical Behavior of Granular Mixtures

Shin, H. / Santamarina, J. C.

Abstract

Particle shape affects the mechanical behavior of soils, including packing density, stiffness, volume change during shear, and strength. Laboratory experiments conducted to study the mechanical response of sand mixtures made of round and angular grains show an increase in void ratio, small strain shear modulus $G_{max}$ (constant fabric), oedometric compressibility $C_{C}$ (fabric changes), and friction angle but a decrease in lateral stress coefficient $k_{0}$ as the mass fraction of angular particles increases. These results reflect variations in particle mobility and highlight the relative role of contact stiffness versus fabric changes.

Role of Particle Angularity on the Mechanical Behavior of Granular Mixtures

Shin, H. / Santamarina, J. C.

Abstract

Particle shape affects the mechanical behavior of soils, including packing density, stiffness, volume change during shear, and strength. Laboratory experiments conducted to study the mechanical response of sand mixtures made of round and angular grains show an increase in void ratio, small strain shear modulus $G_{max}$ (constant fabric), oedometric compressibility $C_{C}$ (fabric changes), and friction angle but a decrease in lateral stress coefficient $k_{0}$ as the mass fraction of angular particles increases. These results reflect variations in particle mobility and highlight the relative role of contact stiffness versus fabric changes.

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Title:

Role of Particle Angularity on the Mechanical Behavior of Granular Mixtures

Contributors:

Shin, H. (author) / Santamarina, J. C. (author)

Published in:

Journal of Geotechnical and Geoenvironmental Engineering ; 139 ; 353-355

Publication date:

2012-05-16

Size:

32013-01-01 pages

ISSN:

1090-0241 , 1943-5606

DOI:

https://doi.org/10.1061/(ASCE)GT.1943-5606.0000768

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

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