BALLAST AND FOUNDATION MATERIALS RESEARCH PROGRAM. PHASE IV. MATERIALS EVALUATION STUDY

This report presents the results of Phase 4 - Materials Evaluation Study, of the Ballast and Foundation Materials Research Program. Emphasis is on characterizing the response of the structural support elements (subgrade, subballast, and ballast) with respect to in service loading conditions. Properties of the subgrade, the subballast, and the ballast that significantly influence track structure behavior and performance have been identified. Part A of the report includes the evaluation of the resilient (elastic) response and permanent strain response of 7 ballast and subballast materials. Part B contains plastic strain and degradation results of ballast materials subject to long term (1 million repetitions) loading. Part C includes the evaluation of resilient response and permanent strain response of ten subgrade soils. Thermal regime characterization, including freeze-thaw analysis is presented in Part D. A comprehensive summary and conclusions are given in Part E.

• Record URL:
  • https://railroads.dot.gov/elibrary/materials-evaluation-study-ballast-and-foundation-materials-research-program
• 
• Corporate Authors:

  University of Illinois, Urbana-Champaign

  Department of Civil and Environmental Engineering
  205 North Mathews Avenue
  Urbana, IL  United States  61801-2352

  Association of American Railroads Research Center

  3140 South Federal Street
  Chicago, IL  United States  60616

  Federal Railroad Administration

  Office of Research and Development, 1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Knutson, R M
  • Thompson, M R
  • Mullin, T
  • Tayabji, S D
• Publication Date: 1977-1

Media Info

• Media Type: Digital/other
• Pagination: 324 p.

Subject/Index Terms

• TRT Terms: Deformation curve; Foundations; Freezing; Inspection; Loads; Moisture content; Plastic deformation; Railroad tracks; Resilience (Materials); Rocks; Soil mechanics; Soil stabilization; Soil tests; Subballast; Subgrade (Pavements); Testing; Thaw; Track ballast; Train track dynamics; Variables
• Uncontrolled Terms: Ballast; Degradation; Subgrade stability
• Old TRIS Terms: Track component investigations; Track response investigations; Track structures; Variations
• Subject Areas: Geotechnology; Railroads;

Filing Info

• Accession Number: 00151837
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: FRA-ORD-77/02 Tech Rpt.
• Contract Numbers: DOT-FR-30038
• Files: NTIS, TRIS, USDOT
• Created Date: May 11 1977 12:00AM