There are maintenance jobs which cannot be governed by regulations, in particular winter maintenance, and especially anti-skid measures. One of the reasons for the large variations in winter maintenance standards is that this is organised in independent units which must act on their own. Winter maintenance costs about 12% of the total maintenance budget. Most of it is concentrated on a few days spread over the winter season. Sand can raise friction on ice to 0.3, which is sufficient but provides no margin of safety; it is thrown off after the passage of 200-300 vehicles, and icy patches form. The only way of melting ice is to apply salt; salt promotes formation of slush which reduces visibility, but on major routes safety considerations outweigh this disadvantage. Salt causes corrosion; tests made on stationary and mobile metal samples show, generally speaking, that almost all the difference in corrosion between stationary and mobile samples is related to salt. However, only about one-third of corrosion is attributable to salt, and traffic safety considerations thus prevail. Nacl absorbs heat on dissolution while cacl emits heat, but the latter is more corrosive and hygroscopic. The two are mixed. /TRRL/

  • Availability:
  • Corporate Authors:

    Svenska Vag-Och Vattenbyggaren Riksforband

    Regeringsgaten 98
    S-11139 Stockholm,   Sweden 
  • Authors:
    • Hubendick, P E
  • Publication Date: 1974


  • Swedish

Media Info

  • Features: Figures; Photos;
  • Pagination: 4 p.
  • Serial:
    • Vag-Och Vattenbyggaren
    • Issue Number: 12
    • Publisher: Svenska Vag-Och Vattenbyggaren Riksforband
    • ISSN: 0042-2177

Subject/Index Terms

Filing Info

  • Accession Number: 00125160
  • Record Type: Publication
  • Source Agency: Swedish National Road and Traffic Research Institute
  • Files: ITRD, TRIS
  • Created Date: Nov 18 1975 12:00AM