As part of a major review of sprayed sealing by the Roads and Traffic Authority (RTA) in New South Wales over the past three years, various methodsof seal design were examined and a profile of seal behaviour established. Seal behaviour was evaluated by field testing and inspection, and by examining laboratory samples taken from the field at various intervals. Examples of good and poor seals were also tested. The results of the testing and a profile of seal behaviour are reported. As the work progressed, therole that the underlying base and the primerseal play in determining the behaviour and success of the seal was highlighted. Priming and primersealing design methods and techniques were reviewed. The behaviour of the seal has confirmed most of the longstanding priming and primersealing practices, some of which had fallen into disuse in New South Wales. An investigation of the behaviour of existing seals showed that the basic principles of the Hanson model of seal behaviour is not verified by field performance. This study supported a review of the 1975 NAASRA seal design method and promoted the further development and modification of the seal design method of the National Institute of Traffic and Road Research (NITRR) of South Africa. (a) For the covering abstract of this conference see IRRD abstract no. 861222.


  • English

Media Info

  • Features: References;
  • Pagination: p. 1-16

Subject/Index Terms

Filing Info

  • Accession Number: 00669765
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ATRI
  • Created Date: Dec 23 1994 12:00AM