PSV tyre / test specimen contact

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

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


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 - 30 Aug 2015

Publication series

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

Bibliographical note

Reference text: Boyle O (2014) Modeling PSV mould wear, MEng Civil Engineering dissertation, University of Ulster.
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EN 12697-49 (2014) Bituminous mixtures – Test methods for hot mix asphalt Part 49: De-termination of friction after polishing.
Hosking R (1992) Road aggregates and skidding, State of the art review 4. Transport Re-search Laboratory, London, HMSO ISBN 0115511156.
Huschek ES (2004) Experience with skid resistance prediction based on traffic simulation. 5th International Symposium on Pavement Surface Characteristics, Toronto, Canada.
McCall R (2013) Development of a 2d image analysis technique to quantify aggregate expo-sure during paint erosion testing of PSV test specimens. Internal report, Highway Engineering Research Group, University of Ulster.
McQuaid G (2014) Development of a 3d image analysis technique to quantify tyre indentation. Internal report, Highway Engineering Research Group, University of Ulster.
Parslow GI, Stephenson DJ, Strutt JE and Tetlow S (1997). Paint layer erosion resistance behaviour for use in a multilayer paint erosion indication technique. Wear 212, 103-109.
Roe PG and Woodward WDH (2004) Predicting skid resistance from the polishing proper-ties of the aggregate (SKIDPREDICT). Transport Research Laboratory PR CSN/31/03.
Woodward D (2003) Predicting early life skid resistance of highway surfacings (SKIDGRIP). EPSRC Grant GR/R09022/01.


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


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