ASPHALT TRACKBED TECHNOLOGY DEVELOPMENT

The evolution of hot-mix asphalt (HMA) trackbed technology is documented as presently practiced in the United States. Criteria used in selecting sites for and the attendant benefits of HMA trackbeds, based on long-term performance evaluations, are discussed. Prevailing practices for selecting ideal HMA mix parameters, trackbed section designs, and application procedures are described in detail. Primary attention is directed at the "underlayment" procedure in which the HMA serves as a premium subballast layer within the track structure to enhance the support, waterproofing, and confinement properties of the subballast. The roadbed or subgrade materials underlying the HMA mats maintain near-optimum moisture content. The HMA appears to undergo little if any weathering or deterioration in the trackbed environment. The resultant benefits are decreased maintenance costs, fewer slow orders, fewer operational interferences, and improved operational efficiency of the rail network overall.

• Record URL:
  https://doi.org/10.3141/1713-01
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=ASPHALT+TRACKBED+TECHNOLOGY+DEVELOPMENT&author=J.+Rose&author=E.+Brown&author=M.+Osborne&publication_year=2000
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309066921
• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1713, Railroad Track Engineering and Maintenance; Passenger Rail Planning and Operations.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Rose, J G
  • Brown, E R
  • Osborne, M L
• Publication Date: 2000

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 1-9
• Serial:
  • Transportation Research Record
  • Issue Number: 1713
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Asphalt; Hot mix asphalt; Moisture content; Railroad tracks; Subballast; Technology assessment; Waterproofing
• Uncontrolled Terms: Subgrade (Railroads); Trackbeds
• Subject Areas: Geotechnology; Highways; Railroads;

Filing Info

• Accession Number: 00800109
• Record Type: Publication
• ISBN: 0309066921
• Files: TRIS, TRB
• Created Date: Oct 5 2000 12:00AM