Settlement behaviour of hybrid asphalt-ballast railway tracks

Zelong Yu, David P. Connolly, Peter Keith Woodward, Omar Laghrouche

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)
96 Downloads (Pure)


The use of structural asphalt layers inside ballasted railway tracks is attractive because it can increase track bending stiffness. Therefore, for the first time, this paper investigates the long-term settlement characteristics of asphaltic track in the presence of a subgrade stiffness transition zone. Phased load cyclic compression laboratory tests are performed on a large-scale hybrid asphalt-ballast track, supported by subgrade with varying stiffness. It is found that an asphaltic layer acts as a bridge to shield the subgrade from high stresses. It is also found that the asphalt reduces track settlement, and is particularly effective when subgrade stiffness is low.
Original languageEnglish
Pages (from-to)808-817
Number of pages10
JournalConstruction and Building Materials
Early online date18 Mar 2019
Publication statusPublished - 30 May 2019


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