MODIFIED MODELS FOR MAJOR REPAIR PLANNING . 5TH CONFERENCE ON ASPHALT PAVEMENTS FOR SOUTHERN AFRICA (CAPSA 89). PROCEEDINGS HELD IN SWAZILAND, 5-9 JUNE, 1989

Various agencies have adopted deterministic models in order to evaluate short range and long range maintenance and rehabilitation planning programs. For problems at network level, these models are expressed in terms of only a single pavement condition index, usually the pavement serviceability index (PSI), pavement condition index (PCI) or penetration ratio (PR) index. Unfortunately, a pavement state cannot be evaluated by a single parameter, and thus the use of a single parameter may lead occasionally to misleading results at the output stage of the planning program. Family models are therefore required which take into account other pavement-state parameters. It is suggested in this paper that the PR rating method be used together with three additional parameters, to be inserted in formulated models. These parameters are needed for governing (a) the deterioration rate over time; (b) the structural rehabilitation solutions for various pavements at a given PR value; and (c) the ride-comfort properties of various pavements at a given PR value. Various tentative values, as gathered on the basis of work done on the Israeli interurban road system, are suggested in the paper. These values should be considered as preliminary average ones, requiring more specific correlation work to specific site-observations. It is, however, highly recommended that use be made of these values, at least for conducting sensitivity analyses on the various outputs derived from any pavement management calculations.(A) For the covering abstract of the conference see IRRD 828827.

  • Availability:
  • Corporate Authors:

    CAPSA

    PO BOX 993
    Manzini,   Swaziland 
  • Authors:
    • Livneh, Moshe
  • Publication Date: 1989

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00604029
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • ISBN: 0-620-14395-9
  • Files: ITRD, TRIS
  • Created Date: Feb 28 1991 12:00AM