RESILIENT RESPONSE OF RAILWAY BALLAST

The resilient responses of five typical open-graded aggregate materials (dolomitic limestone, blast-furnace slag, granitic gneiss, basalt, and gravel) that are used for railway ballast were measured in a triaxial cell. Three levels of compaction and seven stress levels were used. The results were used in regression analyses to develop equations relating the resilient modulus of a specimen to its first stress invariant. They were also used in correlation analyses attempting to relate the resilient response to the physical properties (particle index, specific gravity, Los Angeles abrasion, gradation, flakiness, soundness, and crushing index), but no consistent relations were established. It is concluded that (a) the resilient response of a specimen is essentially independent of its stress history, (b) the resilient moduli of no. 4 and no. 5 ballast-gradation specimens are usually lower than that of a well-graded aggregate, (c) the resilient moduli of open-graded ballast materials are virtually insensitive to changes in gradation or compaction level and (d) the variable that most directly influences the resilient moduli of granular materials is stress level. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 31-39
  • Monograph Title: Concrete, aggregates, marking materials, corrosion, and joint seals
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00183528
  • Record Type: Publication
  • ISBN: 0309026806
  • Files: TRIS, TRB
  • Created Date: Dec 12 1978 12:00AM