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A platform for research: civil engineering, architecture and urbanism
Effectiveness of Steel Reinforcing Interlayer Systems on Delaying Reflective Cracking
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 stiffer 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.
Effectiveness of Steel Reinforcing Interlayer Systems on Delaying Reflective Cracking
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 stiffer 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.
Effectiveness of Steel Reinforcing Interlayer Systems on Delaying Reflective Cracking
Baek, Jongeun (author) / Al-Qadi, Imad L. (author)
Airfield and Highway Pavements Specialty Conference 2006 ; 2006 ; Atlanta, Georgia, United States
Airfield and Highway Pavement ; 62-73
2006-04-28
Conference paper
Electronic Resource
English
Effectiveness of Steel Reinforcing Interlayer Systems on Delaying Reflective Cracking
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