THERMAL EFFECTS IN CEMENTED PAVEMENT LAYERS

The theoretical effect of temperature on a pavement containing either cement- or lime-treated layers was analysed by finite difference techniques. In an uncracked treated layer the thermal stresses were shown to be significant and usually large enough to induce initial cracking. Thermal insulation, achieved by placing a pavement layer on top of the treated layer, was shown to be effective in reducing the thermal stresses, and the thickness of the insulating layer was found to be more important than the thermal properties of the insulating material. However, the analysis also showed that once a layer has cracked, which usually occurs either due to thermal or shrinkage effects (or a combination of both), movement can take place at the cracks thus eliminating a build-up of stress and making the thermal stresses negligible in comparison with traffic-associated stresses. The conclusion is, therefore, that for structural pavement design purposes no attention needs to be paid to thermal stresses in cement- and lime-treated layers. However, the slight thermal movement which takes place at the cracks can be prevented from causing cracking of the bituminous surfacing by placing a 150 mm layer of crushed stone over the cement- or lime-treated layer.(a) /TRRL/

  • Availability:
  • Corporate Authors:

    Whitehall Technical Press Limited

    Wrotham Place
    Wrotham, Sevenoaks, Kent ME14 1PE,   England 
  • Authors:
    • Otte, E
  • Publication Date: 1978-12

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 2
  • Serial:
    • Highway Engineer
    • Volume: 25
    • Issue Number: 12
    • Publisher: Whitehall Press Limited
    • ISSN: 0306-6452

Subject/Index Terms

Filing Info

  • Accession Number: 00193940
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Jun 13 1979 12:00AM