SWISS WORK TO BEAT BRIDGE DECAY

An account is given of the damage caused to concrete bridges by de-icing salt in the Swiss Canton of Graubuenden. Waterproof deck membranes were not introduced until 1973 after several years damage by winter salting, and details are given of the materials used as protection measures. Salt is also found to attack roller bearings and to combat this stainless steel or teflon bearings are used or longer spans with fewer joints. A description is given of the method used for repairing reinforced concrete which includes the use of a polymer modified cement mix in the replacement cover. Waterproof paint systems are also used to retard the ingress of brine and will probably be used even more now that a wider range of colours is available. Carbonation is also seen as a major cause of deterioration particularly in newer bridges. (TRRL)

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 26
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00382471
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Apr 30 1984 12:00AM