SURFACE DRESSINGS ON MOTORWAYS

The author discusses the use of surface dressings to resurface motorways in the light of experience in DOE's north eastern RCU. Extensive areas of surfaced dressed high stone content rolled asphalt on the A1 are reported as being in good condition after ten years of trafficking, as are trials of surfaced dressed rolled asphalt basecourse on the A635 after three years. The main part of the article is concerned with the surface dressing of both carriageways of a 2.5 km length of the M18 where minor cracks in the rolled asphalt had been observed. The surface was hard and rough and the method employed was to use 50 evt tar with two dressings; one with 40:60 tar/bitumen coated 6 mm blastfurnace slag chippings, and the other with tar coated gritstone or steel slag chippings. Progressive compaction by traffic across the width was achieved, using buffer lane traffic control. After 3 months 4 per cent of the chippings were swept from the hard shoulders as compared with 0.2 per cent on chipped asphalt sections. The author expresses the view that it is advantageous to replace two-course rolled asphalt surfacings on motorways by a single high stone content asphalt course and a surface dressing. Advantages and disadvantages of surface dressing are listed. /TRRL/

  • Availability:
  • Corporate Authors:

    Department of the Environment

    Room 1640 Lunar House, 40 Wellesley Road
    Croydon CR9 2EL,   England 
  • Authors:
    • Sargeant, H L
  • Publication Date: 1976-9

Media Info

  • Features: Photos; Tables;
  • Pagination: p. 38-39
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00149081
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • ISBN: 0 117244 21
  • Report/Paper Numbers: Analytic
  • Files: ITRD, TRIS
  • Created Date: Jul 2 1977 12:00AM