FIFTH PROGRESS REPORT OF RESEARCH PROJECT ON BALLASTS

Tabulated results on four ballast materials, granite, two samples of limestone, and asphalt coated limestone are presented. Oscillator tests, Los Angeles abrasion tests and sieve analyses were performed. Auxilliary tests included specific gravity and absorption and sodium sulfate soundness. In the 10 cycle soundness tests aggregate limestone showed losses slightly in excess of the maximum allowable. Results on fines produced in the oscillator tests on both limestone specimens yielded fines that exhibited plastic properties. A new ballast test installation is described. The new test machine utilizes hydraulic jacks actuated by pulsating hydraulic pressure to provide repeated loading to the ballast section being tested. Loads up to 100,000 lb can be applied to each section at a rate of up to 400 applications per minute.

  • Corporate Authors:

    American Railway Engineering Association

    59 East Van Buren Street
    Chicago, IL  USA  60605
  • Publication Date: 1958

Media Info

  • Features: Tables;
  • Pagination: p. 817-825
  • Serial:
    • AREA BULLETIN
    • Volume: 59
    • Publisher: American Railway Engineering Association

Subject/Index Terms

Filing Info

  • Accession Number: 00052385
  • Record Type: Publication
  • Source Agency: Association of American Railroads
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Jul 15 1974 12:00AM