EXPERIMENTS ON A NEW CONCRETE PAVEMENT STRUCTURE ON A MOTORWAY SITE: THICK SLAB WITHOUT FOUNDATION

EXPERIMENTATION D'UNE NOUVELLE STRUCTURE DE CHAUSSEE EN BETON SUR UN CHANTIER D'AUTOROUTE: LA DALLE EPAISSE SANS FONDATION

Some rigid pavement sections built in France between 1965 and 1970 show signs of early ageing. Two solutions were put forward to remedy this phenomenon, the second solution being the construction of a thick concrete slab without foundation. This article describes this technique. Several experimental sites were set up, and details are given of one of these sites on the a36 Beaune-Mulhouse Motorway. The alignment presented particularly severe problems. The site showed that a very thick slab on a drainage layer (unbound gravel) can be laid with the spreading equipment available to firms, even when the gradient and banking are severe (6%). But the movements of lorries bringing concrete supplies require special precautions over the draining layer on sites with rapid output. The follow-up study of experimental sites should solve remaining problems. The following points in particular will have to be examined: necessity and quality of the draining layer (porosity, trafficability); behaviour of the structure, in particular durability of load transfer at the joints and possible occurrence of stair effect phenomenon; thickness of the slab and uses of this structure as a function of the traffic; economic aspects as a function of the stresses imposed on the subgrade. (TRRL)

  • Corporate Authors:

    Revue Generale des Routes

    9 rue Magellan
    Paris 8e,   France 
  • Authors:
    • Nissoux, J L
  • Publication Date: 1978-6

Language

  • French

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00309223
  • Record Type: Publication
  • Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
  • Files: ITRD, TRIS
  • Created Date: May 21 1980 12:00AM