This paper was presented at session 24 - surfacings and surface friction 2. Open-graded plant mix has been used as a wet weather friction course on freeways, high speed urban and rural roads and accident prone locations in New South Wales since 1967. This mix is designed to provide A permeable pavement surface layer which will maintain a satisfactory frictional level during wet weather by allowing the water to permeate into the surface and slowly drain to the sides of the pavement by lateral displacement, thereby reducing the incidence of surface ponding. In the high speed road situation, this mix has the further advantage of reducing vehicle noise. This paper is an extension of the work reported by Ross and Rufford (1972) and summarises the the former and subsequent investigational work carried out by The Department of Main Roads, New South Wales. This summary includes measurements of TRRL pendulum tester and ml mu-meter friction, permeability and textural properties of the surfacings under various traffic conditions and looks at the effects of aggregate type and binder on the performance of these surfacings. Recommendations are made on the assessment of effective life of alternative mixes in field service. (TRRL)

Media Info

  • Features: Tables;
  • Pagination: p. 149-156
  • Serial:
    • Volume: 9
    • Issue Number: 3

Subject/Index Terms

Filing Info

  • Accession Number: 00308017
  • Record Type: Publication
  • Source Agency: ARRB Group Ltd.
  • Files: ITRD, TRIS, ATRI
  • Created Date: Apr 22 1980 12:00AM