PSV tyre / test specimen contact

David Woodward, Phillip Millar, Grainne McQuaid, Rebecca McCall, Oisin Boyle

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

2 Citations (Scopus)


The PSV test has been used for many years. It is the harmonised European standard method for predicting an aggregates polishing resistance. This paper considers the test tyre / test specimen interface. This was done by painting the PSV test specimen surface and subjecting it to a period of accelerated polishing. Digital images of the test specimen were analysed using 2d and 3d techniques. Tyre / aggregate contact area was found to range from 17 % to 92 % of the test specimen area. Factors such as particle shape (convex, concave, flat) and particle orientation in the test specimen influence contact. The contact interface relates to the uppermost 1 to 2 mm of the test specimen surface. A weak relationship was found showing contact area to increase as wet skid resistance decreased. Whilst aggregate micro-texture remains an important factor the research suggests addi-tional scales of texture and contact influence water films at the interface. The findings of this paper impact attempts to measure road skid resistance using non-contact methods of measurement.
Original languageEnglish
Title of host publication8th RILEM International Symposium on Testing and Characterisation of Sustainable and Innovative Bituminous Materials
EditorsFrancesco Canestrari, Manfred Partl
ISBN (Print)978-94-017-7342-3
Publication statusPublished (in print/issue) - 30 Aug 2015

Publication series

NameRILEM Bookseries
PublisherSpringer, Dordrecht
ISSN (Print)2211-0844
ISSN (Electronic)2211-0852


  • PSV tyre / test specimen interface
  • Contact area
  • 2d 3d modeling


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