STRESS-STRAIN AND STRENGTH BEHAVIOR OF STAPLE FIBER AND CONTINUOUS FILAMENT-REINFORCED SAND

Laboratory triaxial compression tests were performed to examine the stress-strain behavior and strength characteristics of sands reinforced with randomly distributed staple fibers and continuous filaments. A medium uniform sand and a medium moderately well-graded sand, both with the same D sub 50, were tested in consolidated-drained triaxial compression with volume changes measured. The reinforcement consisted of randomly distributed 100-mm-long staple fibers and continuous filaments of an untwisted, multifilament 100% polyester yarn of the same type used in Texsol construction. Reinforcement concentration was 0.2% by weight of sand, the same commonly used in the field. Results indicate that randomly distributed staple fibers and continuous filaments increase the compressive strength, axial and volumetric strain at failure, and postpeak strength loss of the composite compared with unreinforced sand behavior. Filament reinforcement was found to contribute significantly more to the increase in stress-strain behavior than staple fiber reinforcement. Finally, a reinforced well-graded subangular sand had a greater increase in the stress-strain characteristics than a reinforced uniformly graded subrounded sand.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 82-95
  • Monograph Title: Mechanically stabilized backfill and properties of geosynthetics and geocomposites
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00712993
  • Record Type: Publication
  • ISBN: 0309061105
  • Files: TRIS, TRB
  • Created Date: Oct 12 1995 12:00AM