Aggregate Surfacing Design and Management for Low-Volume Roads in Temperate, Mountainous Areas

An integrated aggregate design and management system for forest roads in wet, mountainous terrain requires special considerations. Typically, subgrade soils, drainage conditions, and compactive effort vary along the length of new and existing roads. There are fewer testing opportunities for obtaining design parameters in these remote areas. Nevertheless, relatively small depths of aggregate can provide high performance. This design requires characterization of subgrade materials before or during construction. It uses steep road grades to advantage for effective drainage of the subgrade and aggregate. The design is used in conjunction with drainage practices that minimize erosion from reaching streams. Compaction effectiveness can be limited by soil moisture that is wet of optimum for compaction during the short construction period, requiring that aggregate depths be adjusted accordingly. To be used by practitioners, the design must be simple and not very conservative. Aggregate properties vary widely, and gradation specifications must be adjusted on the basis of these properties. Aggregate roads require timely inspection and should be graded only when they are rutted or major defects are present. Drainage and subgrade problems also need to be addressed during maintenance of the surface.

• Record URL:
  https://doi.org/10.3141/1989-59
• 
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=Aggregate+Surfacing+Design+and+Management+for+Low-Volume+Roads+in+Temperate%2c+Mountainous+Areas&author=K.+Mills&author=M.+Pyles&author=R.+Thoreson&publication_year=2007
• Availability:
  • Find a library where document is available. Order URL: http://www.trb.org/Main/Public/Blurbs/158926.aspx
• Authors:
  • Mills, Keith
  • Pyles, Marvin
  • Thoreson, Rick
• Conference:
  • 9th International Conference on Low-Volume Roads
  • Location: Austin Texas, United States
  • Date: 2007-6-24 to 2007-6-27
• Publication Date: 2007

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 154-160
• Monograph Title: Low-Volume Roads 2007. Volume 2
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 1989
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Aggregate gradation; Compaction; Design; Drainage; Forest roads; Low volume roads; Maintenance management; Mountain roads; Soil water; Subgrade materials; Temperate regions
• Subject Areas: Design; Geotechnology; Highways; Hydraulics and Hydrology; Maintenance and Preservation; Pavements; I22: Design of Pavements, Railways and Guideways; I36: Aggregates; I60: Maintenance;

Filing Info

• Accession Number: 01051238
• Record Type: Publication
• ISBN: 9780309104630
• Files: TRIS, TRB, ATRI
• Created Date: Jun 8 2007 9:09AM