Waxy bitumens are less suitable for road bitumen purposes, expecially owing to their weak resistance to the effects of water and poor rheological properties at low temperatures. On the other hand, road oil derived from waxy crude oil and used with a proper adhesive agent is quite suitable for, e. g. cold-mixed oil gravel pavements. The use of studded tyres increased rqpidly in Finland so that by February, 1969, 75 per cent of the total road traffic travelled on studded tyres. The average wear sustained by asphalt pavements has been about 10 mm after one million runs. The circular test track has proved to be highly successful in in comparing the resistance of different pavements to the action of studded tyres. The most resistant asphaltic pavements have proved to be dense-graded asphalt mixtures rich in mortar, and precoated coarse chippings rolled into the surface. The surface dressings also have good resistance to studded tyres. The best binder is hot bitumen, followed by cationic asphalt emulsion. Cold-laid asphalt pavements are not as resistant to studded tyres as are hot mix pavements. Thin wearing coarses are not resistant to the action of studded tyes and therefore are no longer used on pavements for motor traffic. /Author/

  • Supplemental Notes:
    • Presented at the XIVth World Road Congress, Prague, Czechoslovakia, 1971.
  • Corporate Authors:

    Permanent International Assoc of Road Congresses

    43 Avenue du President Wilson
    Paris 16eme,   France 
  • Authors:
    • NIEMI, A
  • Publication Date: 1971

Media Info

  • Features: Figures; Photos;
  • Pagination: 10 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00265687
  • Record Type: Publication
  • Report/Paper Numbers: Book II-6
  • Files: TRIS
  • Created Date: Feb 27 1975 12:00AM