Fatigue Cracking Resistance of Fiber-Reinforced Asphalt Concrete

The crack resistance of asphalt concrete pavement is difficult to characterize because of the complexity of the cracking phenomenon. This article reports on a study that used fracture energy to investigate the influence of fibers on the fatigue cracking resistance of asphalt concrete. The asphalt pavement was embedded with recycled nylon carpet fibers. The study included two phases: the single fiber pull-out test and the indirect tension strength test. The pull-out tests of 15-denier single nylon fibers showed that the critical fiber embedded length is 9.2 mm. The indirect tension strength tests featured samples of asphalt concrete mixed with nylon fibers of two lengths, 6 and 12 mm and three volume fractions, 0.25, 0.5, and 1%. Results showed that asphalt concrete samples fabricated with fibers of 1% and 12 mm had 85% higher fracture energy than non-reinforced specimens, showing improved fatigue cracking resistance. The authors conclude that this increased fracture energy represents a potential for improving asphalt fatigue life, which may be facilitated through the use of recycled carpet fibers.

  • Authors:
    • Lee, S Joon
    • Rust, Jon P
    • Hamouda, Hechmi
    • Kim, Y Richard
    • Borden, Roy H
  • Publication Date: 2005-2

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 123-128
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01046716
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 14 2007 8:09AM