The research project described is based on the idea that ideal roads in cold climates should consist of A load-bearing sub-base, a layer of insulation material and A load-bearing pavement. Cellular polystyrene slabs are used as a frost blanket. Experiences from two test roads in southern and middle Sweden are presented. Parameters investigated are: concrete slab size and thickness, method of locking the slabs together, quality of the insulation material and its thickness, structure of the sub-base and climatic condition during construction. The results prove that slabs, sized 150 x 150 cm, can provide roads with satisfactory bearing capacity, even for heavy traffic. The tests with small slabs (35 x 35 cm) indicated some possibility of future application but that would imply more development work. For locking the slabs together an inclined tongue-and-groove joint proved to be the most efficient way. To prevent cracking and to improve the longitudinal and lateral rigidity the tongue is increased down to the bottom of the slab at a length of 20 cm both at corners and the middle of the slab sides with corresponding recesses in adjacent slabs. The concrete slabs must be at least 15 cm thick and should be laid directly upon the insulating layer. /TRRL/

  • Authors:
    • Persson, B
  • Publication Date: 1975


  • Swedish

Media Info

  • Features: Figures;
  • Pagination: p. 19-21
  • Serial:
    • Cementa
    • Volume: 1 N
    • Issue Number: 3

Subject/Index Terms

Filing Info

  • Accession Number: 00137548
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • Files: ITRD, TRIS
  • Created Date: Oct 6 1976 12:00AM