Abstract
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 language | English |
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Pages (from-to) | 808-817 |
Number of pages | 10 |
Journal | Construction and Building Materials |
Volume | 208 |
Early online date | 18 Mar 2019 |
DOIs | |
Publication status | Published - 30 May 2019 |