Geotechnical characteristics of a Rubber Intermixed Ballast System

Arachchige, CMK; Indraratna, B; Qi, Y; Vinod, J; Rujikiatkamjorn, C

Geotechnical characteristics of a Rubber Intermixed Ballast System

Arachchige, CMK Indraratna, B

Qi, Y

Vinod, J Rujikiatkamjorn, C

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Publisher:: Springer
Publication Type:: Journal Article
Citation:: Acta Geotechnica, 2021
Issue Date:: 2021-07-21

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Field	Value	Language
dc.contributor.author	Arachchige, CMK
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-9057-1514
dc.contributor.author	Qi, Y https://orcid.org/0000-0002-3486-2130
dc.contributor.author	Vinod, J
dc.contributor.author	Rujikiatkamjorn, C https://orcid.org/0000-0001-8625-2839
dc.date.accessioned	2022-02-15T23:40:33Z
dc.date.available	2022-02-15T23:40:33Z
dc.date.issued	2021-07-21
dc.identifier.citation	Acta Geotechnica, 2021
dc.identifier.issn	1861-1125
dc.identifier.issn	1861-1133
dc.identifier.uri	http://hdl.handle.net/10453/154553
dc.description.abstract	This study aims to promote the concept of using rubber granules from waste tyres as elastic aggregates blended with traditional ballast particles for better performance of rail tracks, i.e. a Rubber Intermixed Ballast System (RIBS). This paper describes the mechanical and compressibility characteristics of RIBS under monotonic loads and a criterion designed to determine the optimum rubber content in the proposed RIBS. The most interesting findings of this study embrace how the rubber granules in the blended rockfill assembly significantly reduce the dilation and modulus degradation, and the breakage of ballast aggregates. RIBS with more than 10% of rubber demonstrates a seemingly consistent reduction in dilation under changing confining pressures. Increased deviator stress and larger effective confining pressure compress the rubber particles within the RIBS which may cause relatively large initial settlements in the ballast layer, if the rubber content becomes excessive. It is also evident from the results that rubber particles ranging from 9.5 to 19 mm with similar angularity to ballast aggregates is advantageous, because, they reduce the breakage of load-bearing larger aggregates, thus effectively controlling ballast fouling within the granular matrix.
dc.language	English
dc.publisher	Springer
dc.relation	http://purl.org/au-research/grants/arc/IC170100006
dc.relation	http://purl.org/au-research/grants/arc/DP180101916
dc.relation.ispartof	Acta Geotechnica
dc.relation.isbasedon	10.1007/s11440-021-01342-2
dc.rights	The final publication is available at Springer via http://dx.doi.org/ 10.1007/s11440-021-01342-2
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	0905 Civil Engineering
dc.subject.classification	Geological & Geomatics Engineering
dc.title	Geotechnical characteristics of a Rubber Intermixed Ballast System
dc.type	Journal Article
utslib.for	0905 Civil 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	open_access	*
pubs.consider-herdc	false
utslib.copyright.embargo	2022-08-31T00:00:00+1000Z
dc.date.updated	2022-02-15T23:40:31Z
pubs.publication-status	Accepted

Abstract:

This study aims to promote the concept of using rubber granules from waste tyres as elastic aggregates blended with traditional ballast particles for better performance of rail tracks, i.e. a Rubber Intermixed Ballast System (RIBS). This paper describes the mechanical and compressibility characteristics of RIBS under monotonic loads and a criterion designed to determine the optimum rubber content in the proposed RIBS. The most interesting findings of this study embrace how the rubber granules in the blended rockfill assembly significantly reduce the dilation and modulus degradation, and the breakage of ballast aggregates. RIBS with more than 10% of rubber demonstrates a seemingly consistent reduction in dilation under changing confining pressures. Increased deviator stress and larger effective confining pressure compress the rubber particles within the RIBS which may cause relatively large initial settlements in the ballast layer, if the rubber content becomes excessive. It is also evident from the results that rubber particles ranging from 9.5 to 19 mm with similar angularity to ballast aggregates is advantageous, because, they reduce the breakage of load-bearing larger aggregates, thus effectively controlling ballast fouling within the granular matrix.

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http://hdl.handle.net/10453/154553