Some aspects of maintenance of unsealed pavements in New Zealand

The common New Zealand approach to an unsealed road is that it is below expectations and is held in a partially developed stage hopefully until some time in the future when sealing may become possible. In a limited number of cases, however, a fully developed pavement of adequate strength has been built, usually with the help of quick lime as a stabiliser. The resulting cost saving in terms of annual maintenance has encouraged the view that fully developed pavements are worthwhile. This has prompted further investigations and research. This paper seeks to develop some thoughts in that direction. It commences with a review of current maintenance practices and then seeks to identify some of the more important basic principles which affect pavement performance. The use of local, often secondary quality aggregates is regarded as paramount in order to keep costs down. Another important factor is the beneficial use of water suction forces to assist stability. Suggestions are made as to how the underlying principles can be applied to construction in the practical sense. Conclusions include the statement that there is a separate technology for unsealed roads and that it requires a different approach to that for roads in the higher volume traffic situation (a).

• Record URL:
  http://arrbknowledge.com
• Authors:
  • Ferry, A G
• Conference:
  • Australian Road Research Board (ARRB) Conference, 13th, 1986, Adelaide, Australia
• Publication Date: 1986

Language

• English

Media Info

• Pagination: 31-41
• Monograph Title: Study on bitumen with a view to improving road surfacing
• Serial:
  • Volume: 13
  • Issue Number: 3

Subject/Index Terms

• TRT Terms: Aggregates; Base course (Pavements); Cohesion; Grading (Earthwork); Gravel roads; Highway maintenance; Moisture content; Roughness; Soil stabilization; Unpaved roads
• ATRI Terms: Aggregate; Basecourse; Cohesion; Grading; Moisture content; Replacement; Road maintenance; Roughness; Soil stabilization; Unsealed road
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 01427377
• Record Type: Publication
• Source Agency: ARRB
• Files: ATRI
• Created Date: Aug 24 2012 2:16PM