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Determination of macro-scale soil properties from pore scale structures: Image based modelling of poroelastic structures

Determination of macro-scale soil properties from pore scale structures: Image based modelling of poroelastic structures
Determination of macro-scale soil properties from pore scale structures: Image based modelling of poroelastic structures
We show how a combination of X-ray Computed Tomography and image based modelling can be used to calculate the effect of moisture content and compaction on the macroscopic structural properties of soil. Our method is based on the equations derived in [1], which we have extended so they can be directly applied to segmented images obtained from X-ray Computed Tomography. We assume that the soils are composed of air filled pore space, solid mineral grains and a mixed phase composed of both clay particles and water. We considered three different initial soil treatments, comprised of two different compaction levels and two different moisture contents. We found that the effective properties of the soils were unaffected by compaction over the range tested in this paper. However, changing the moisture content significantly altered the hydraulic and mechanical properties of the soils. A key strength of this method is that it enables the optimization,or even design of soils composed from different constituents, with specific mechanical and hydraulic properties.
1364-5021
Daly, Keith
36d0472c-85da-43ba-b0ef-4705c3409565
Keyes, Samuel
ed3ee62b-e257-4b92-922c-023b232e8145
Roose, Tiina
3581ab5b-71e1-4897-8d88-59f13f3bccfe
Daly, Keith
36d0472c-85da-43ba-b0ef-4705c3409565
Keyes, Samuel
ed3ee62b-e257-4b92-922c-023b232e8145
Roose, Tiina
3581ab5b-71e1-4897-8d88-59f13f3bccfe

Daly, Keith, Keyes, Samuel and Roose, Tiina (2018) Determination of macro-scale soil properties from pore scale structures: Image based modelling of poroelastic structures. Proceedings of the Royal Society A, 474 (2215). (doi:10.1098/rspa.2017.0745).

Record type: Article

Abstract

We show how a combination of X-ray Computed Tomography and image based modelling can be used to calculate the effect of moisture content and compaction on the macroscopic structural properties of soil. Our method is based on the equations derived in [1], which we have extended so they can be directly applied to segmented images obtained from X-ray Computed Tomography. We assume that the soils are composed of air filled pore space, solid mineral grains and a mixed phase composed of both clay particles and water. We considered three different initial soil treatments, comprised of two different compaction levels and two different moisture contents. We found that the effective properties of the soils were unaffected by compaction over the range tested in this paper. However, changing the moisture content significantly altered the hydraulic and mechanical properties of the soils. A key strength of this method is that it enables the optimization,or even design of soils composed from different constituents, with specific mechanical and hydraulic properties.

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More information

Accepted/In Press date: 6 June 2018
e-pub ahead of print date: 11 July 2018
Published date: July 2018

Identifiers

Local EPrints ID: 421320
URI: http://eprints.soton.ac.uk/id/eprint/421320
ISSN: 1364-5021
PURE UUID: a446765d-4087-44b7-82e9-0a9c8135a96b
ORCID for Samuel Keyes: ORCID iD orcid.org/0000-0002-4129-2228
ORCID for Tiina Roose: ORCID iD orcid.org/0000-0001-8710-1063

Catalogue record

Date deposited: 01 Jun 2018 16:30
Last modified: 07 Oct 2020 06:08

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