The identification of uniform pavement sections during the initial assessment of a project level rehabilitation project

The optimisation of road pavement rehabilitation design strongly depends on the accurate identification of uniform pavement sections showing distinct differences in bearing capacity and hence rehabilitation needs. The identification of uniform pavement sections is a major output of the Initial Assessment part of a project level rehabilitation investigation. However, differences in “inherent bearing capacity” are often ignored in practice through the adoption of a “popular” blanket approach of partial reconstruction of the pavement through the use of e.g. much improved and readily available in-situ recycling and stabilisation construction equipment. In addition, the official Technical Recommendations for Highways (TRH) document dealing with rehabilitation design (draft TRH12: (1997) “Flexible pavement rehabilitation investigation and design”) as used in South Africa, give little guidance to the design engineer on the requirements for the identification of uniform pavement sections with distinctly different inherent bearing capacity. The identification of these differences is key to the optimisation of pavement rehabilitation design. This paper aims to address in more detail the aspects involved in the identification of different uniform pavement sections. Items influencing the differences in inherent bearing capacity are identified and appropriate processes of data evaluation specifically aimed at the identification of differences between sections are recommended.

Language

  • English

Media Info

  • Pagination: 11p
  • Monograph Title: 11th Conference on Asphalt Pavements for Southern Africa: CAPSA15, 16-19 August 2015, Sun City, South Africa

Subject/Index Terms

Filing Info

  • Accession Number: 01597099
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Apr 22 2016 11:14AM