Highway performance of insoluble dry powdered polymer stabilisation

The Australian Stabilisation Industry Association (AustStab) has defined a dry powdered polymer (dpp) as a dry powdered road stabilising binder consisting of an insoluble polymer thermally bound to a very fine carrier such as fly ash. The process used to establish the suitability of DPP stabilisation requires basic soil parameters to be determined, such as maximum dry density, optimum moisture content, particle distribution and Atterberg limits. Once these parameters have been established, the correct binder type can be chosen to then carry out California bearing ratio (CBR) testing, and capillary rise and swell as per Australian Standard AS 1141.531996. Laboratory results conducted over the last ten years by several state and local Government authorities has consistently shown a considerable increase in soaked CBR strength when mixed with insoluble DPPs for moderate to poor quality gravels. Performance in the field during the same period has seen minimal to no change to the as-built formation shape and condition, and without failure or repair expenditure attributed to DPP binders to date.(a) For the covering entry of this conference, please see ITRD abstract no. E214098.

  • Authors:
    • LACEY, G C
  • Publication Date: 2005-11

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01043095
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ATRI
  • Created Date: Mar 6 2007 8:15AM