Imperial College London
Alternate

Dr J Antonio H Carraro

Faculty of Engineering, Department of Civil and Environmental Engineering

Honorary Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 6038antonio.carraro Website

 
 
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Location

 

528BSkempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Barnett:2021:10.1680/jgeot.19.p.103,
author = {Barnett, N and Rahman, MM and Karim, MR and Nguyen, HBK and Harb, Carraro JA},
doi = {10.1680/jgeot.19.p.103},
journal = {Geotechnique},
pages = {423--440},
title = {Equivalent state theory for sand with non-plastic fine mixtures: A DEM investigation},
url = {http://dx.doi.org/10.1680/jgeot.19.p.103},
volume = {71},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - DEM was used to simulate constant volume (undrained) triaxial compression tests for coarse particles (sand) mixed with non-plastic fines. The fines content (fc) of the mixtures tested was kept equal to 0, 0.05, 0.10 or 0.20. Accordingly, the critical state and micromechanical responses of these mixtures were evaluated. A focus on the influence of fc on sand behaviour was captured when fc<fthre, where fthre represents a threshold fines content, which corresponds to a transition between a fines-in-sand soil matrix to a sand-in-fines soil matrix. DEM was utilised to assess the micromechanical participation of fine particles within the sand skeleton (matrix). Such evaluations led to assessing the performance of the equivalent granular void ratio (e), the equivalent granular state parameter (), and ultimately their inherent parameter b, which represents the proportion of fines actively participating in the sand skeleton structure. It was observed that through capturing the stress partition of contact types within granular mixtures, a reasonable approximation of the active proportion of contacts within the sand matrix could be obtained leading to a DEM interpretation of the b parameter. The study therefore evaluated the concept and applicability of the equivalent state theory for sand-fines  mixtures.
AU  - Barnett,N
AU  - Rahman,MM
AU  - Karim,MR
AU  - Nguyen,HBK
AU  - Harb,Carraro JA
DO  - 10.1680/jgeot.19.p.103
EP  - 440
PY  - 2021///
SN  - 0016-8505
SP  - 423
TI  - Equivalent state theory for sand with non-plastic fine mixtures: A DEM investigation
T2  - Geotechnique
UR  - http://dx.doi.org/10.1680/jgeot.19.p.103
UR  - https://www.icevirtuallibrary.com/doi/10.1680/jgeot.19.P.103
UR  - http://hdl.handle.net/10044/1/75215
VL  - 71
ER  -
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