THE PROTECTION OF VIADUCTS AGAINST FROST. INSTALLATION OF A HEATING DEVICE ON THE VAL D'AOSTE MOTORWAY-VIADUCTS /IN ITALIAN/

THREE HEATING SYSTEMS WERE CONSIDERED: ELECTRIC HEATING BY SURFACE GRID, ELECTRIC HEATING BY MEANS OF WIRES PLACED INSIDE THE SURFACING, AND TUBES CONTAINING HOT WATER PLACED IN AN INDEPENDENT CONCRETE SLAB BETWEEN SURFACING AND CONCRETE FLOOR. THE THIRD SYSTEM WAS ADOPTED. IT PREVENTS THE FORMATION OF BLACK ICE, AND ENABLES THE EXISTING ICE TO THAW AND RESULTING WATER TO EVAPORATE FOR LIMIT WIND AND TEMPERATURE CONDITIONS. FOR A POWER OF 215 CAL/SQ KM, THE COST OF THE INSTALLATION IS 24900 LIRAS PER SQ M, AND OPERATING COSTS FOR ANNUAL USE OF 1000 HOURS ARE APPROXIMATELY 1000 LIRAS PER SQ M PER YEAR. THE FIRST PART OF THE INSTALLATION WAS TESTED IN FEBRUARY 1969 AND WAS FOUND TO BE SATISFACTORY. FURTHER TESTS IN JANUARY 1970 CONFIRMED THE FIRST FINDINGS. /TRRL/

  • Corporate Authors:

    Prestampa /Italy

    ,    
  • Authors:
    • ALOCCO, V
  • Publication Date: 0

Media Info

  • Features: Figures; Photos; Tables;
  • Pagination: p. 1-20
  • Serial:
    • Issue Number: 4

Subject/Index Terms

Filing Info

  • Accession Number: 00237647
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Theme 1
  • Files: TRIS
  • Created Date: Jun 25 1973 12:00AM