Although substantial research of geotextiles (e.g., physical properties, testing procedures, specification requirements) has been accomplished, the majority of this work dealt with original fabric properties (i.e., before installation). The Pennsylvania Department of Transportation (PennDOT) foresaw the potential usefulness of fabrics and undertook one of the earliest field evaluations aimed specifically at monitoring the characteristics of the in-place fabrics over a period of years. Initial fabric properties were well documented before installation in a longitudinal pavement edge drain system. Fabrics were exhumed and tested for permeability and strength properties at 1-, 2-, and 6-year intervals after placement. Results indicated that, even though some reductions in fabric permeabilities and strengths were evident, all fabrics were still substantial enough to perform the intended drainage and filtration functions better than the standard control section without fabric. Permeabilities of each of the six fabric types were still at least .1 cm/sec after 6 years. The minimum average tensile strength in the weakest direction was still 82 lb after 6 years of service. This work partly influenced PennDOT's recent inclusion of geotextiles in their general specifications and standard drawings for subsurface drainage. (Author)

Media Info

  • Media Type: Print
  • Features: Figures; Maps; References; Tables;
  • Pagination: pp 89-94
  • Monograph Title: Engineering fabrics in transportation construction
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00381712
  • Record Type: Publication
  • ISBN: 0309035597
  • Files: TRIS, TRB
  • Created Date: Mar 30 1984 12:00AM