Effectiveness of steel reinforcing interlayer systems on delaying reflective cracking

Jongeun Back, Imad L Al-Qadi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Pavement reflection cracking propagates into the surface due to environmental and vehicular loadings. In order to delay reflection cracking, several interlayer systems have been recently introduced. These interlayer systems may delay reflective cracking by two mechanisms: Reflective cracking can be retarded by using reinforcement systems, which are suffer than surrounded materials, such as geosynthetics or steel reinforcement. The other mechanism is based on using stress absorption material such as a low modulus material. In this paper, a fracture mechanics approach is used to predict crack initiation and propagation in a pavement overlay with and without interlayer systems. The cohesive zone model (CZM), which has been prevalently employed to simulate crack formation, is adapted for modeling crack development in overlays. Using the aforementioned modeling, crack initiation time and crack propagation rate are obtained. Effectiveness of interlayer systems is quantified based on interface shear stiffness as well as hot-mix asphalt (HMA) temperature. The steel reinforcement interlayer was found to delay the initiation and propagation of reflective cracking. This retardation of reflective cracking is affected by the interface shear stiffness; hence, suggests the importance of proper bonding at the interface. Improper installation of steel reinforcement netting may cause local and global debonding at interface between interlayer and surrounded layers. Consequently, this behavior at interface affects the initiation and propagation of reflective cracking.

Original languageEnglish (US)
Title of host publicationAirfield and Highway Pavements
Subtitle of host publicationMeeting Today's Challenges with Emerging Technologies - Proceedings of the 2006 Airfield and Highway Pavement Specialty Conference
Pages62-73
Number of pages12
StatePublished - Jun 14 2006
Event2006 Airfield and Highway Pavement Specialty Conference - Atlanta, GA, United States
Duration: Apr 30 2006May 3 2006

Publication series

NameProceedings of the 2006 Airfield and Highway Pavement Specialty Conference
Volume2006

Other

Other2006 Airfield and Highway Pavement Specialty Conference
CountryUnited States
CityAtlanta, GA
Period4/30/065/3/06

Keywords

  • Cohesive zone model
  • FE Modeling
  • Interlayer
  • Reflective cracking
  • Steel reinforcement
  • Viscoelastic analysis

ASJC Scopus subject areas

  • Engineering(all)

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