Road rehabilitation/pavement recycling

This paper outlines the latest developments in pavement recycling by insitu cement stabilisation as a cost effective pavement rehabilitation option. A six kilometre section of the Sturt Highway at Accommodation Hill SA has been recycled to a depth of 375mm in one layer. Because of insufficient pavement depth, 150mm of clayey silt subgrade was incorporated into the recycled material. Preconstruction activities and design processes are described including selection of binder type, determination of pavement depth and the pavement material mix. Construction of this pavement involved the latest technology equipment for spreading and single pass recycling. Compaction and trimming operations are critical to the quality of the final road quality produced from this one pass, deep lift recycling process. Post construction structural evaluation of the pavement was undertaken including Falling Weight Deflectometer and repeated load testing of drill cores extracted from the recycled pavement. In addition final quality in terms of riding quality was assessed from roughness testing. Whilst the economic advantage of recycling has long been recognised, the capacity to construct deeper single layers implies a broader application to the road network. Therefore greater lengths of rehabilitation can be achieved for the ever decreasing road dollar.

Language

  • English

Media Info

  • Pagination: 12p
  • Monograph Title: Local Government Engineering Conference, Adelaide, 16-17 March 1994; conference papers

Subject/Index Terms

Filing Info

  • Accession Number: 01434353
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Aug 24 2012 6:15PM