Development of best practice for recycling surface course materials back into thin surfacing

Proprietary thin asphalt surfacing systems were first introduced into the United Kingdom in 1991. The need to recycle thin surfacing systems is more critical than with many other generic surfacing materials because of the quantity of relatively scarce aggregates with high skid-resistance properties within the layer. Site trials demonstrated comparable field performance over 6 years. The treatment of reclaimed asphalt (RA) and the quantity that can be added depend on the consistency of the RA source, compatibility with proposed new surfacing, asphalt plant capability, and residual binder properties. Two major resurfacing schemes were successfully constructed incorporating up to 25% of the existing surfacing into the new surface course layer. Laboratory investigations with RA sources with low penetration and relatively high penetration residual binder properties and the results of performance measurements from the field are leading to the development of best practice guidance for future schemes.

  • Authors:
    • CARSWELL, I
    • NICHOLLS, J C
    • WIDYATMOKO, I
    • HARRIS, J
    • TAYLOR, R
    • LEE, D
  • Publication Date: 2009

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01144911
  • Record Type: Publication
  • Source Agency: TRL
  • Files: ITRD
  • Created Date: Nov 23 2009 10:16AM