Use of rubber mats to improve the deformation and degradation behavior of rail ballast under cyclic loading

Navaratnarajah, SK; Indraratna, B

Use of rubber mats to improve the deformation and degradation behavior of rail ballast under cyclic loading

Navaratnarajah, SK Indraratna, B

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Publisher:: American Society of Civil Engineers
Publication Type:: Journal Article
Citation:: Journal of Geotechnical and Geoenvironmental Engineering, 2017, 143, (6), pp. 1-15
Issue Date:: 2017-06-01

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Field	Value	Language
dc.contributor.author	Navaratnarajah, SK
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-9057-1514
dc.date.accessioned	2022-07-14T06:00:02Z
dc.date.available	2022-07-14T06:00:02Z
dc.date.issued	2017-06-01
dc.identifier.citation	Journal of Geotechnical and Geoenvironmental Engineering, 2017, 143, (6), pp. 1-15
dc.identifier.issn	1090-0241
dc.identifier.issn	1943-5606
dc.identifier.uri	http://hdl.handle.net/10453/158912
dc.description.abstract	The deterioration of a rail track due to large dynamic wheel loads is inevitable over the years and leads to frequent, high-cost maintenance. This problem is more critical in isolated rail track locations such as bridges and tunnels, where the substructure is much stiffer than the surface track assembly. One measure used to minimize track deterioration is geosynthetic inclusions such as rubber mats under the layer of ballast. In this study, cyclic loads from fast and heavy-haul trains were simulated on stiffer track foundation conditions using a large-scale process simulation triaxial (prismoidal) apparatus (PSPTA) to investigate the performance of ballast improved by rubber mats locally manufactured from recycled tires. The laboratory results indicate that the energy-absorbing (damping) characteristics of rubber mats reduce the amount of deformation and degradation of ballast under stiffer track conditions. The study shows that rubber mats distribute the stress applied from moving trains more uniformly by increasing the effective contact area, which then reduces the dynamic amplification of applied vertical stress and leads to much less ballast degradation.
dc.language	English
dc.publisher	American Society of Civil Engineers
dc.relation.ispartof	Journal of Geotechnical and Geoenvironmental Engineering
dc.relation.isbasedon	10.1061/(ASCE)GT.1943-5606.0001669
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0907 Environmental Engineering
dc.subject.classification	Geological & Geomatics Engineering
dc.title	Use of rubber mats to improve the deformation and degradation behavior of rail ballast under cyclic loading
dc.type	Journal Article
utslib.citation.volume	143
utslib.for	0905 Civil Engineering
utslib.for	0907 Environmental 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	*
pubs.consider-herdc	false
dc.date.updated	2022-07-14T05:59:55Z
pubs.issue	6
pubs.publication-status	Published
pubs.volume	143
utslib.citation.issue	6

Abstract:

The deterioration of a rail track due to large dynamic wheel loads is inevitable over the years and leads to frequent, high-cost maintenance. This problem is more critical in isolated rail track locations such as bridges and tunnels, where the substructure is much stiffer than the surface track assembly. One measure used to minimize track deterioration is geosynthetic inclusions such as rubber mats under the layer of ballast. In this study, cyclic loads from fast and heavy-haul trains were simulated on stiffer track foundation conditions using a large-scale process simulation triaxial (prismoidal) apparatus (PSPTA) to investigate the performance of ballast improved by rubber mats locally manufactured from recycled tires. The laboratory results indicate that the energy-absorbing (damping) characteristics of rubber mats reduce the amount of deformation and degradation of ballast under stiffer track conditions. The study shows that rubber mats distribute the stress applied from moving trains more uniformly by increasing the effective contact area, which then reduces the dynamic amplification of applied vertical stress and leads to much less ballast degradation.

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http://hdl.handle.net/10453/158912