SURVIVABILITY OF SUBGRADE SEPARATORS

A primary use of geotextiles is as a separator between an aggregaate base and underlying weak soils, preventing the movement of fines from the subgrade into the base aggregate. This maintains the integrity of the base aggregate and allows an increase in the allowable bearing stress acting on the subgrade. The results are presented in this paper of laboratory testing on 4 different types of fabrics which have been exposed to very similar construction stresses and traffic loadings. The four different geotextiles were utilized in the construction of a paved parking lot. The fabrics were placed in strips perpendicular to the flow of traffic in the parking area. Two of the fabrics were woven slit tape material. The others were nonwoven fabrics: one spunbonded and the other needlepunched. Details of the installation, field observations, and testing data are presented. After eight years, there is no evidence of sizeable chemical degradation of the polymers, nor is there a catastrophic loss in any measured physical property. Geotextile degradation during installation and repeated service loads, can be limited by proper consideration of stone placement and equipment selection and operation.

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  • Corporate Authors:

    Industrial Fabrics Association International

    345 Cedar Building, Suite 450
    St Paul, MN  United States  55101-1088
  • Authors:
    • Richardson, G N
    • Behr, L H
  • Publication Date: 1990-5

Media Info

  • Pagination: p. 22-26
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00495160
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Jun 30 1990 12:00AM