Observations were carried out since the concrete pavement was opened to traffic. It is subject to marked daily changes in temperature, heavy rainfall, frequent freezing-thawing cycles and moderate but rapidly increasing traffic. After three years the coefficient of longitudinal friction decreased from 0,5 to 0,25 and the sand patch depth from 0,8 to 0,4 mm. The concrete section with compensated shrinkage has approximately 20 randomly placed cracks due to spalling, while the fibre concrete section has only two cracks. On each side of some cracks there is a displacement of 5 to 6 mm between following slabs. Surface displacements at the joints and cracks due to differences in temperature of 40 deg C can reach 1,5 mm for slabs 4 to 6 mm and 4,5 mm in the case of long compensated concrete slabs or fibre-reinforced concrete slabs. The temperature varies with depth so that displacements between the upper and lower parts of the layers show the same difference as the average displacement at mid-thickness as a function of the average temperature. The deflections at the corners of the slabs are influenced by thermal conditions and bearing conditions. Deformations under static loads are small. Some thermal phenomena can give rise to deformations three times greater than those due to static loads. (TRRL)

  • Corporate Authors:

    Laboratoire Central des Ponts et Chausees (LCPC)

    Boulevard Lefebvre 58
    Paris Cedex 15,   France  F-75732
  • Authors:
    • Coperaa, M
    • Vergne, M
    • Lambert, M E
  • Publication Date: 1978-1-2


  • French

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00309661
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Dec 11 1980 12:00AM