TESTING OF SUBGRADE STABILIZATION FABRICS MOVES AHEAD--3

This installment describes a stabilization fabric, Typar, which is a nonwoven sheet formed of continuous filaments of 100 percent polyprolene that are directionalized preferentially in the length and width directions of the sheet and spunbonded at filament junctions. Typar is inserted between ballast and subgrade where it facilitates drainage by allowing water to move upward while filtering out fines which would foul ballast. It is also able to spread the load through the subgrade. This support membrane has been used under two miles of Illinois Central Gulf mainline and for a temporary shoo-fly track in New York State for an overpass project. Details of installation are given.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/1763403
• Supplemental Notes:
  • See related articles in nos. 7 and 9, RRIS 00 141119 and 141563.
• Corporate Authors:

  Simmons-Boardman Publishing Corporation

  508 Birch Street
  Bristol, CT  United States  06010
• Publication Date: 1976-10

Media Info

• Features: Photos;
• Pagination: p. 22-23
• Serial:
  • Railway Track and Structures
  • Volume: 72
  • Issue Number: 10
  • Publisher: Simmons-Boardman Publishing Corporation
  • ISSN: 0033-9016

Subject/Index Terms

• TRT Terms: Ballast (Railroads); Ballast mats; Fabrics; Mud pumps; Polymers; Railroad tracks; Soil stabilization; Subgrade (Pavements)
• Uncontrolled Terms: Ballast; Subgrade stability
• Old TRIS Terms: Mud pumping
• Subject Areas: Geotechnology; Railroads;

Filing Info

• Accession Number: 00142951
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 15 1976 12:00AM