Journal
GEOTECHNIQUE LETTERS
Volume 10, Issue 4, Pages 535-541Publisher
ICE PUBLISHING
DOI: 10.1680/jgele.19.00080
Keywords
friction; laboratory tests; particle-scale behaviour
Categories
Funding
- Engineering and Physical Sciences Research Council [EP/S026460/1]
- EPSRC [EP/S026460/1] Funding Source: UKRI
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A detailed experimental programme investigated how the coefficient of friction at particle contacts for a typical UK railway ballast varied during cyclic loading. Despite a decrease of roughness, the friction coefficient increased steadily, stabilising in the region of tens of cycles. In contrast to previous work on the contact behaviour of sands, water inundation caused a significant but reversible decrease of the coefficient, while the generation of a significant amount of abraded fines did not affect it, nor did the load level.
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