A new simple model for the determination of the pore constriction size distribution

To, Huu Duc, Scheuermann, Alexander, and Williams, David J. (2012) A new simple model for the determination of the pore constriction size distribution. In: Proceedings of the 6th International Conference on Scour and Erosion. pp. 295-303. From: ICSE-6: 6th International Conference on Scour and Erosion, 27-31 August 2012, Paris, France.

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Abstract

Suffusion is a process in which particles are removed from pores and transported through the pore constrictions of a solid skeleton. The quantitative analysis of the suffusion process at the particle scale is difficult, because it is not necessarily clear which part of the particles forms the solid skeleton, and which part can be removed. Furthermore, there is the enormous number and various shapes of particles. Therefore, existing computational programs based on DEM often take days to create and to compute a pore model for this problem. This paper presents a new approach based on simple sphere packing with three acceptable assumptions, namely the occurrence of only spherical particles, the assumption of a minimum number of contacts with neighbouring particles, and the substitution of the fraction of small particles of a soil with a non-spherical body. By introduction of the second assumption the calculation speed is significantly improved. Furthermore, three filling types are introduced in the model, which are random, descending and layer-wise. The new approach allows the investigation of the relationship between porosity and probability of suffusion. The contribution will introduce a further understanding on primary fabrics size and point out difficulties in application of filter criterion for suffusion assessment according to the German guideline.

Item ID: 45998
Item Type: Conference Item (Research - E1)
Keywords: suffusion, soil modelling, porosity, pore constriction, sphere packing, primary fabrics size
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Funders: Vietnamese Government, Australian Coal Association Research Program (ACARP), Australian Research Council (ARC)
Projects and Grants: ACARP project C19022, ARC Discovery Project DP120102188
Date Deposited: 19 Oct 2016 01:15
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering @ 80%
08 INFORMATION AND COMPUTING SCIENCES > 0802 Computation Theory and Mathematics > 080205 Numerical Computation @ 20%
SEO Codes: 87 CONSTRUCTION > 8702 Construction Design > 870201 Civil Construction Design @ 100%
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