REPORT ON ASPHALT TREATMENT OF BALLAST AND BRIDGE DECKS

This report deals with the asphalt ballast treatments made during 1960 on five roads and the bridge deck treatments on two roads. In addition, a progress report is presented on the nine track sections and one bridge project treated in 1959. The general features of these latter projects were described last year and appear in the Proceedings, Vol. 61, 1960, page 715. These treatments are the result of the research project jointly sponsored by the Roadway and Ballast Committee of the American Railway Engineering Association, of the Asphalt Institute and the Research Department of the AAR. Special equipment for the process has been developed and used, the description of which appears in the Proceedings, Vol. 60, 1959, page 712. The applications were made possible by the complete and excellent cooperation of the participating railroads who bore the cost of the materials and application with such technical assistance as required from the staff of the Asphalt Institute and the AAR. The special equipment has been made available upon request to any railroad without charge. It is expected that after revisions and repairs indicated during service in 1960 they will also be available to Member Roads in 1961 upon request to the Research Department, AAR. Some difficulty was experienced with the equipment on this project and full coverage was not obtained under the rail, through the restricted station area. Also, the application of the cover coat was not fully uniform. The project appeared fairly satisfactory upon completion. The 1960 ballast treatments covered a wide range of conditions. They will be valuable in determining the effects of climate and track characteristics on such treatments. Work this year has further demonstrated that good coverage can be obtained which should serve very effectively toward tie preservation and protection of track fittings against corrosion. With the use of extended spray nozzles directed under the rail, full coverage and a good seal of the full ballast section was obtained in most cases, particularly where there was an opening under the rail in the cribs. The equipment in transfer movements from project to project indicated several deficiencies in security fastenings and appreciable damage occurred. This damage at times interfered with full production on the treatments reducing efficiency and raising costs to some extent. Careful note has been made of all sub-standard conditions and plans have been made for their correction including a number of betterments. If programs during 1961 indicate the need for the cars these changes will be made prior to the season and the cars will be available without charge to the roads on request to the Research Department, AAR.

  • Supplemental Notes:
    • Conducted under sponsorship of AREA Committee 1 - Roadway and Ballast.
  • Corporate Authors:

    Association of American Railroads Research Center

    3140 South Federal Street
    Chicago, IL  United States  60616
  • Authors:
    • Smith, R
  • Publication Date: 1961-2

Media Info

  • Pagination: 6 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00097257
  • Record Type: Publication
  • Source Agency: Association of American Railroads
  • Report/Paper Numbers: ER-10
  • Files: TRIS
  • Created Date: Jul 29 1976 12:00AM