BACKCALCULATION PROCEDURES FOR THREE-LAYERED CONCRETE PAVEMENTS

This paper considers the general problem of backcalculation of multi-layer PCC pavement systems, and identifies a number of distinct approaches for its solution. Two backcalculation schemes are developed for a three-layered concrete pavement, incorporating a dense liquid foundation. The first models the constructed layers as a plate-on-elastic layer pair, whereas the second assumes that both constructed layers act as plates. The proposed method is based on the equivalent thickness concept, which is used to transform the real pavement into an equivalent two-layer system. Parameters for the original three-layered system are then obtained from the results of slab-on-grade backcalculation, using equations derived on the basis of the equivalent thickness concept. Comparisons with existing backcalculation approaches show that the proposed scheme leads to realistic estimates of the concrete slab modulus, even in cases involving a stiff base layer.

Language

  • English

Media Info

  • Features: References; Tables;
  • Pagination: p. 77-91
  • Serial:
    • Volume: 1

Subject/Index Terms

Filing Info

  • Accession Number: 00728634
  • Record Type: Publication
  • Files: TRIS, STATEDOT
  • Created Date: Nov 27 1996 12:00AM