Skip to content

Important notice

The building where our contact centre is based was evacuated last week. Our 0800 numbers are up and running again, but please be patient as we have limited support available for our contact centre staff. We’ll do our best to help you if you need to call us.  For more information read our latest media release.

Access keys for nzta.govt.nz

  • h Home
  • m Menu
  • 0 Show list of access keys
  • 2 Skip to content
  • 3 Skip to top
Back to Resources

Research Report 372 Resealing strategies to increase seal life and prevent seal layer instability

Published: | Category: Activity management , Research programme , Research & reports | Audience: General

A study of cores from multilayer chipseals shows that fine solid materials (passing 4.75 mm) fill a significant proportion of the chipseal volume that would otherwise be available for bitumen. If fines are ignored, the available voids are typically about twice the expected volume of bitumen that would be sprayed. Generation of fines may therefore contribute significantly to premature flushing. The origin of these fine materials remains to be examined; at least six different processes may contribute, and the relative contributions may vary from site to site.

Publication details

  • Author:
  • Published: June 2009
  • Reference: 372
  • ISBN/ISSN: ISBN (paperback): 978-0-478-34604-6 ISBN (pdf): 978-0-478-34603-9 ISSN (paperback): 1173-3756 ISSN (pdf): 1173-3764
Top