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Scaling relationships for strip fibre reinforced aggregates

Scaling relationships for strip fibre reinforced aggregates
Scaling relationships for strip fibre reinforced aggregates
Previous research on random fibre-reinforced granular materials has shown that the relative dimensions of the grains and fibres significantly affect the macromechanical behaviour of the mixture. However, quantitative data are scarce and most previous work has focused on fine to medium sands, leaving uncertainties regarding the applicability of current knowledge to larger size aggregates such as railway ballast. In this paper, triaxial test data on 1/3 and 1/5 scale railway ballast are used to develop scaling relationships for the size and quantity of fibres needed to achieve the same reinforcing effect in granular materials of differing grain size. It is shown that, to maintain consistency across scales, fibre content should be quantified as a numerical (i.e., number of fibres per grain) rather than a volumetric ratio. It is further shown that increasing the fibre length increases the resistance of the mixture to deviator stress if the fibres are wide enough; and that provided an allowance is made for the effect of fibre tension, the changes in the stress–strain–strength behaviour of the granular matrix resulting from the changes in void ratio associated with the addition of the fibres are consistent with conventional soil mechanics theory across scales.
0008-3674
710-719
Ajayi, Olufemi
acdec1f1-e3ef-4ae4-bb6b-5f27ebd4f980
Le Pen, Louis
4a38e256-d113-4bba-b0d4-32d41995928a
Zervos, Antonios
9e60164e-af2c-4776-af7d-dfc9a454c46e
Powrie, William
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
Ajayi, Olufemi
acdec1f1-e3ef-4ae4-bb6b-5f27ebd4f980
Le Pen, Louis
4a38e256-d113-4bba-b0d4-32d41995928a
Zervos, Antonios
9e60164e-af2c-4776-af7d-dfc9a454c46e
Powrie, William
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c

Ajayi, Olufemi, Le Pen, Louis, Zervos, Antonios and Powrie, William (2017) Scaling relationships for strip fibre reinforced aggregates. Canadian Geotechnical Journal, 54 (5), 710-719. (doi:10.1139/cgj-2016-0346).

Record type: Article

Abstract

Previous research on random fibre-reinforced granular materials has shown that the relative dimensions of the grains and fibres significantly affect the macromechanical behaviour of the mixture. However, quantitative data are scarce and most previous work has focused on fine to medium sands, leaving uncertainties regarding the applicability of current knowledge to larger size aggregates such as railway ballast. In this paper, triaxial test data on 1/3 and 1/5 scale railway ballast are used to develop scaling relationships for the size and quantity of fibres needed to achieve the same reinforcing effect in granular materials of differing grain size. It is shown that, to maintain consistency across scales, fibre content should be quantified as a numerical (i.e., number of fibres per grain) rather than a volumetric ratio. It is further shown that increasing the fibre length increases the resistance of the mixture to deviator stress if the fibres are wide enough; and that provided an allowance is made for the effect of fibre tension, the changes in the stress–strain–strength behaviour of the granular matrix resulting from the changes in void ratio associated with the addition of the fibres are consistent with conventional soil mechanics theory across scales.

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More information

Accepted/In Press date: 1 October 2016
e-pub ahead of print date: 19 December 2016
Published date: May 2017
Organisations: Infrastructure Group

Identifiers

Local EPrints ID: 403906
URI: http://eprints.soton.ac.uk/id/eprint/403906
ISSN: 0008-3674
PURE UUID: ac02704c-2e4f-44e1-a46a-0e81e1c7e756
ORCID for Louis Le Pen: ORCID iD orcid.org/0000-0002-4362-3895
ORCID for Antonios Zervos: ORCID iD orcid.org/0000-0002-2662-9320
ORCID for William Powrie: ORCID iD orcid.org/0000-0002-2271-0826

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Date deposited: 16 Dec 2016 10:00
Last modified: 17 Dec 2019 01:59

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Contributors

Author: Olufemi Ajayi
Author: Louis Le Pen ORCID iD
Author: Antonios Zervos ORCID iD
Author: William Powrie ORCID iD

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