PERFORMANCE AND DURABILITY OF BITUMINOUS MATERIALS. 11: THE ROLE OF FABRICS IN UPGRADING THE DURABILITY OF BITUMINOUS TREATMENTS

Overlays are normally applied on pavements that exhibit a certain degree of cracking. In addition to enhancing the strength of a pavement, they also correct excessive surface distresses, restore the ride quality and reduce maintenance costs of surface repairs. In cases where there are limited maintenance budgets, thinner overlays are becoming more and more popular. Without any modification of the overlay system this will result in cracking. This paper examines overlay modifiaction via the addition of four synthetic fabric reinforcements. To simulate the mechanisms which lead to reflective cracking, three main tests were used. The Wheel tracking test was used to simulate traffic loading. The INAPOT Tensile test was used to measure tensile strength enhancement and bond strength. The Dartec dynamic load frame was used to assess rate of crack propagation with time. The paper concludes with a site investigation where one of the fabrics was used to reinforce the asphaltic overlay. As yet few conclusive results are available. Nevertheless the laboratory results suggest that the woven fabric has potential in retarding crack growth rate. What remains to be seen is its effective "crack control" in the field. (A) For the covering abstract see IRRD 875331.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 113-22

Subject/Index Terms

Filing Info

  • Accession Number: 00720726
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-419-19730-3
  • Files: ITRD
  • Created Date: May 24 1996 12:00AM