OPENING SIZE RECOMMENDATIONS FOR SEPARATION GEOTEXTILES USED IN PAVEMENTS

Geotextiles are used in pavements as separators to prevent fouling of base course aggregate by subgrade soil. The ability of a geotextile to retain fines depends primarily on its opening size. A number of researchers have performed laboratory and field tests to study the retention behaviour of geotextiles under dynamic conditions. However, the data generated during these studies has never been collectively analyzed. This article utilizes the published data to develop opening size recommendations for separation geotextiles used in pavements. The -85% size of soil is compared with the apparent opening size of geotextiles. The data indicates that for sand and silt size particles, a geotextile with apparent opening size (O(sub 95)) less than -85% size (d(sub 85)) of retained soil would perform satisfactorily. However, for fine soils in suspension, the ratio of geotextile O(sub 95) to soil d(sub 85) should be restricted to 0.5 or less. (A)

  • Availability:
  • Corporate Authors:

    Elsevier

    The Boulevard, Langford Lane
    Kidlington, Oxford  United Kingdom  OX5 1GB
  • Authors:
    • NAREJO, D B
  • Publication Date: 2003-8

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 257-64
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00963914
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Oct 3 2003 12:00AM