0

Full Content is available to subscribers

Subscribe/Learn More  >

Ballast Quality and Breakdown During Transport

[+] Author Affiliations
S. Caleb Douglas

Union Pacific Railroad, Omaha, NE

Paper No. JRC2013-2553, pp. V001T01A019; 7 pages
doi:10.1115/JRC2013-2553
From:
  • 2013 Joint Rail Conference
  • 2013 Joint Rail Conference
  • Knoxville, Tennessee, USA, April 15–18, 2013
  • Conference Sponsors: Rail Transportation Division
  • ISBN: 978-0-7918-5530-0
  • Copyright © 2013 by ASME

abstract

Union Pacific Railroad has prioritized optimizing the life span of ballast material utilized across the system. A multi-faceted approach is presented which addresses (1) obtaining hard, durable ballast; (2) ensuring that the ballast delivered satisfies the specification; and (3) evaluating the resistance of ballast to breakdown during transportation. The initial focus included a quality management system to verify that properly graded and clean ballast is loaded into the railcars. Periodic testing and unannounced quarry visits are in place for each ballast source. Petrographic testing was completed for each source to identify potential problematic mineralogical issues. The second focus is ballast degradation during transport. The study included three railcars shipped to a central location where a gradation analysis on each railcar was completed in its entirety. Various sampling methods were utilized at the ballast sources during loading of the railcar and are compared to the unloaded results. The variability of gradation results from different sampling methods was a significant outcome of the study. The test results indicate that the half inch particle size increased during transport. The outcomes of these series of studies are constant evaluation of ballast suppliers is warranted, obtaining representative samples of ballast for gradation quality control is difficult, and transportation results in a minor increase of the half-inch particle size.

Copyright © 2013 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In