Behavior of geogrid-reinforced ballast under various levels of fouling

Indraratna, B; Ngo, NT; Rujikiatkamjorn, C

Behavior of geogrid-reinforced ballast under various levels of fouling

Indraratna, B

Ngo, NT Rujikiatkamjorn, C

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Geotextiles and Geomembranes, 2011, 29, (3), pp. 313-322
Issue Date:: 2011-06-01

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Field	Value	Language
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-9057-1514
dc.contributor.author	Ngo, NT
dc.contributor.author	Rujikiatkamjorn, C https://orcid.org/0000-0001-8625-2839
dc.date.accessioned	2022-07-28T00:10:52Z
dc.date.available	2022-07-28T00:10:52Z
dc.date.issued	2011-06-01
dc.identifier.citation	Geotextiles and Geomembranes, 2011, 29, (3), pp. 313-322
dc.identifier.issn	0266-1144
dc.identifier.issn	1879-3584
dc.identifier.uri	http://hdl.handle.net/10453/159232
dc.description.abstract	This paper presents a study of how the interface between ballast and geogrid copes with fouling by coal fines. The stress-displacement behavior of fresh and fouled ballast, and geogrid reinforced ballast was investigated through a series of large-scale direct shear tests where the levels of fouling ranged from 0% to 95% Void Contamination Index (VCI), at relatively low normal stresses varying from 15 kPa to 75 kPa. The results indicated that geogrid increases the shear strength and apparent angle of shearing resistance, while only slightly reducing the vertical displacement of the composite geogrid-ballast system. However, when ballast was fouled by coal fines, the benefits of geogrid reinforcement decreased in proportion to the increasing level of fouling. A conceptual normalized shear strength model was proposed to predict this decrease in peak shear stress and peak angle of shearing resistance caused by coal fines at a given normal stress. © 2011.
dc.language	English
dc.publisher	ELSEVIER SCI LTD
dc.relation.ispartof	Geotextiles and Geomembranes
dc.relation.isbasedon	10.1016/j.geotexmem.2011.01.015
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0915 Interdisciplinary Engineering
dc.subject.classification	Geological & Geomatics Engineering
dc.title	Behavior of geogrid-reinforced ballast under various levels of fouling
dc.type	Journal Article
utslib.citation.volume	29
utslib.for	0905 Civil Engineering
utslib.for	0915 Interdisciplinary Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2022-07-28T00:10:51Z
pubs.issue	3
pubs.publication-status	Published
pubs.volume	29
utslib.citation.issue	3

Abstract:

This paper presents a study of how the interface between ballast and geogrid copes with fouling by coal fines. The stress-displacement behavior of fresh and fouled ballast, and geogrid reinforced ballast was investigated through a series of large-scale direct shear tests where the levels of fouling ranged from 0% to 95% Void Contamination Index (VCI), at relatively low normal stresses varying from 15 kPa to 75 kPa. The results indicated that geogrid increases the shear strength and apparent angle of shearing resistance, while only slightly reducing the vertical displacement of the composite geogrid-ballast system. However, when ballast was fouled by coal fines, the benefits of geogrid reinforcement decreased in proportion to the increasing level of fouling. A conceptual normalized shear strength model was proposed to predict this decrease in peak shear stress and peak angle of shearing resistance caused by coal fines at a given normal stress. © 2011.

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http://hdl.handle.net/10453/159232