THE REHABILITATION OF THE N1 FREEWAY BETWEEN CAPE TOWN AND PAARL

This paper describes the rehabilitation of three different pavement types existing within a 35 km section of a heavily trafficked dual carriageway freeway between Cape Town and Paarl, South Africa. This freeway was originally constructed between 1968 and 1973 and the first stage of the rehabilitation was carried out in 1985. A further detailed investigation of the structural and functional condition of these pavements using the South African mechanistic pavement design approach was carried out in 1993. Various rehabilitation measures were selected to best suit the three different pavement types and the second stage of the rehabilitation was carried out in 1995 within a limited budget. The freeway pavement should now be able to carry the projected twenty year design traffic loading of 65 x 10 to the 6th power equivalent 80 kN axle loads. A rut resistant, continuously graded asphalt surfacing was used and rolled in, precoated stone chips were added to provide a skid resistant surface.

• Supplemental Notes:
  • This conference was arranged by the International Society for Asphalt Pavements. The ninth conference will be held in Copenhagen, Denmark in August 2002.
• Corporate Authors:

  University of Washington, Seattle

  Department of Civil and Environmental Engineering, P.O. Box 352700
  Seattle, WA  United States  98195-2700
• Authors:
  • White, M H
  • Van Der Walt, J C
  • van der Merwe, C P
  • Pretorius, F J
• Conference:
  • Eighth International Conference on Asphalt Pavements
  • Location: Seattle, Washington
  • Date: 1997-8-10 to 1997-8-14
• Publication Date: 1997

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 1143-59

Subject/Index Terms

• TRT Terms: Asphalt pavements; Coated chippings; Rehabilitation; Skid resistance; Surface course (Pavements)
• Geographic Terms: South Africa
• Subject Areas: Highways; Maintenance and Preservation; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 00764716
• Record Type: Publication
• Report/Paper Numbers: Volume II
• Files: TRIS
• Created Date: Jun 15 1999 12:00AM