THE DRAINAGE OF NEW AND EXISTING CONCRETE PAVEMENTS IN FRANCE: THE SITUATION AFTER FOUR YEARS OF EXPERIMENTS

LE DRAINAGE DES CHAUSSEES EN BETON NEUVES ET ANCIENNES EN FRANCE: BILAN APRES QUATRE ANNEES D'EXPERIENCE

French concrete pavements, in particular old ones built on erodable sub-bases, sometimes undergo a rapid modification linked with the presence of water between the concrete slab and the sub-base: pumping, fines getting out, stepping. Since 1973 experiments have been performed with lateral drainage trenches in porous materials to evacuate infiltrated water. The earliest on-site experiments on deteriorated pavements showed that when the pavement has become modified beyond a certain limit, the setting in place of lateral drainage can accelerate phenomena of deterioration. Subsequent experiments, coordinated by a working group comprising laboratories and those responsible for the new construction or the maintenance of pavements, showed the value of lateral drainage. In the case of new pavements, the provision of lateral drainage prevents almost all deteriorations due to pumping, without risk to the pavement. In the case of old pavements in good condition (essentially with a non-erodable sub-base), four years of experiments showed that lateral drainage very markedly slowed down pumping and may increased the life of the pavement. On the other hand when the sub-base is very erodable or when deteriorations are already considerable, a drain trench is not a suitable remedy. The cost of making a drainage trench, which is very low by comparison with that of other mainteneance procedures such as overlaying or resurfacing with bituminous concrete, whose efficacity is not always compatible with the cost, justifies the interest now taken in this solution in many countries and the need to continue investigations. /Author/

  • Corporate Authors:

    Laboratoire Central des Ponts et Chausees (LCPC)

    Boulevard Lefebvre 58
    Paris Cedex 15,   France  F-75732
  • Authors:
    • Griselin, J F
  • Publication Date: 1979-7

Language

  • French

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00301221
  • Record Type: Publication
  • Report/Paper Numbers: Special Issue 8
  • Files: TRIS
  • Created Date: Nov 7 1979 12:00AM