Optimising returns from modern asphalt surfacings: The potential effect of reclaimed asphalt on the friction characteristics of surface course material

The paper describes a preliminary examination of the potential impact on friction properties of using reclaimed asphalt (RA) in thin surface course paving systems. The paper begins with a short review of current practices, and then suggests a study to explore the variability of RA and its impact on friction in laboratory asphalt specimens. It is demonstrated that the impact on friction is very small when the RA comes from a surface course, even when it is combined in fairly large proportions with aggregates that are are moderately resistant to polishing and are virgin in nature. A number of examples are provided, and the suggestion is made that durability rather than skid resistance concerns might be the limiting factor in some cases. It is concluded that the amount of RA used in new surface courses should be limited for now, if the RA is from mixed sources, until further exploration and analysis indicates otherwise.

Language

  • English

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Filing Info

  • Accession Number: 01499341
  • Record Type: Publication
  • ISBN: 9781908855831
  • Report/Paper Numbers: PPR670
  • Files: TRIS
  • Created Date: Nov 5 2013 10:27AM