SURFACE DRESSINGS FOR HEAVILY TRAFFICKED ROADS: RESULTS AFTER 10 YEARS OF THE FULL SCALE EXPERIMENT ON A30 BLACKBUSHES, HANTS

THIS REPORT DESCRIBES THE PERFORMANCE OF SURFACE DRESSINGS MADE WITH BOTH TAR AND CUT-BACK BITUMEN BINDERS AND A RANGE OF AGGREGATES WHEN LAID ON A HARD SUBSTRATE ON A HEAVILY TRAFFICKED ROAD. IT IS CONCLUDED THAT IMPROVED PERFORMANCE IS OBTAINED IF PRECAUTIONS ARE TAKEN ADEQUATELY TO RENDER THE MACADAM SUBSTRATE UNIFORM BEFORE SURFACE DRESSING. THROUGHOUT THE LIVES OF THE DRESSING CONSISTENTLY GREATER TEXTURE DEPTHS HAVE BEEN MAINTAINED WITH TAR BINDER THAN WITH CUT-BACK BITUMEN. THE TAR SECTIONS ALSO SHOW HIGHER RESISTANCE TO SKIDDING AT 80 KM/H THAN EQUIVALENT SECTIONS WITH CUT-BACK BITUMEN; BOTH BINDERS HAVE GIVEN DRESSINGS OF GOOD DURABILITY. RECOMMENDATIONS ARE MADE FOR LIMITS FOR AGGREGATE ABRASIONS AND CRUSHING VALUES TO BE SET TO AVOID EXCESSIVE WEAR OF THE APPLIED CHIPPINGS UNDER HEAVY TRAFFIC. /AUTHOR/

  • Supplemental Notes:
    • TRRL-LR-528
  • Corporate Authors:

    Transport and Road Research Laboratory (TRRL)

    Wokingham, Berkshire  United Kingdom 
  • Authors:
    • WRIGHT, N
  • Publication Date: 1973

Media Info

  • Pagination: 18 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00207593
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 16 1973 12:00AM