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Behaviour of clay-fouled ballast under drained triaxial testing

Journal Article


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Abstract


  • Contamination or fouling of rail ballast with external fines, including slurried and pumped subgrade

    material (e.g. clay and silt), is one of the primary reasons for track deterioration. Fouling causes

    differential settlement of the track, and also decreases the load-bearing capacity, owing to the

    reduction in the friction angle of the granular assembly. In certain circumstances, fouled ballast needs

    to be cleaned or replaced to maintain the desired track stiffness, load-bearing capacity and track

    alignment, all of which influence safety. This paper presents and discusses the results of a series of

    large-scale triaxial tests conducted on latite basalt, a rail ballast of volcanic origin, commonly used in

    Australia. Consolidated drained triaxial tests were conducted under three different levels of confining

    pressure and varying degrees of clay fouling. Stress–strain degradation characteristics are discussed in

    detail. This paper also describes the non-linear strength envelope and a novel empirical relationship to

    capture the detrimental effects of clay fouling on the performance of ballasted tracks.

Publication Date


  • 2013

Citation


  • Indraratna, B., Tennakoon, N., Nimbalkar, S. & Rujikiatkamjorn, C. (2013). Behaviour of clay-fouled ballast under drained triaxial testing. Geotechnique: international journal of soil mechanics, 63 (5), 410-419.

Scopus Eid


  • 2-s2.0-84878036353

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1593&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/587

Has Global Citation Frequency


Number Of Pages


  • 9

Start Page


  • 410

End Page


  • 419

Volume


  • 63

Issue


  • 5

Place Of Publication


  • United Kingdom

Abstract


  • Contamination or fouling of rail ballast with external fines, including slurried and pumped subgrade

    material (e.g. clay and silt), is one of the primary reasons for track deterioration. Fouling causes

    differential settlement of the track, and also decreases the load-bearing capacity, owing to the

    reduction in the friction angle of the granular assembly. In certain circumstances, fouled ballast needs

    to be cleaned or replaced to maintain the desired track stiffness, load-bearing capacity and track

    alignment, all of which influence safety. This paper presents and discusses the results of a series of

    large-scale triaxial tests conducted on latite basalt, a rail ballast of volcanic origin, commonly used in

    Australia. Consolidated drained triaxial tests were conducted under three different levels of confining

    pressure and varying degrees of clay fouling. Stress–strain degradation characteristics are discussed in

    detail. This paper also describes the non-linear strength envelope and a novel empirical relationship to

    capture the detrimental effects of clay fouling on the performance of ballasted tracks.

Publication Date


  • 2013

Citation


  • Indraratna, B., Tennakoon, N., Nimbalkar, S. & Rujikiatkamjorn, C. (2013). Behaviour of clay-fouled ballast under drained triaxial testing. Geotechnique: international journal of soil mechanics, 63 (5), 410-419.

Scopus Eid


  • 2-s2.0-84878036353

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1593&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/587

Has Global Citation Frequency


Number Of Pages


  • 9

Start Page


  • 410

End Page


  • 419

Volume


  • 63

Issue


  • 5

Place Of Publication


  • United Kingdom