01152482

Component

https://doi.org/10.3141/2155-02

http://scholar.google.com...lion&publication_year=2010

An asphalt overlay is one of the primary options for rehabilitating existing asphalt and concrete pavements. Reflection cracking, however, has been a serious concern associated with asphalt overlays for a long time. Currently, reflection cracking is not considered in most existing asphalt overlay thickness design programs, including the Mechanistic–Empirical Pavement Design Guide developed under the NCHRP Project 1-37A. Therefore, there is an urgent need to develop a reflection cracking–based asphalt overlay thickness design and analysis tool for routine use. Three reflection cracking mechanisms (bending, shearing, and thermal stress) and mechanistic modeling are discussed according to fracture mechanics concepts. A mechanistic–empirical reflection cracking model is first proposed and then developed into an asphalt overlay thickness design and analysis framework. This framework is further implemented into a Windows-based design program, making it more convenient for pavement engineers to optimize asphalt overlay thickness design on the basis of (a) traffic, (b) climate conditions, (c) existing pavement structure and conditions (e.g., load transfer efficiency at joints), and (d) asphalt overlay alternatives (e.g., single or multilayer overlays, binder type, and mix type selection). A sensitivity analysis is also performed, and five key performance factors are identified: (a) traffic loading level, (b) climate, (c) asphalt overlay thickness, (d) overlay mix type, and (e) load transfer efficiency at joints or cracks. These five factors must be considered when designing an asphalt overlay.

01170024

10-1013

English

pp 12-23

2010

Transportation Research Record: Journal of the Transportation Research Board

9780309142854

Print

Figures (9) ; References (32)

Bituminous overlays; Climate; Fracture mechanics; Load transfer; Mechanistic-empirical pavement design; Pavement design; Pavement joints; Pavement management systems; Reflection cracking; Rehabilitation; Sensitivity analysis; Thickness; Traffic loads

Mechanistic-Empirical Pavement Design Guide

Design; Highways; Maintenance and Preservation; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I61: Equipment and Maintenance Methods

TRIS, TRB, ATRI

Jan 25 2010 10:27AM

• Alternative Validation Practice of an Automated Faulting Measurement Method
• Assessment of Fracture Parameters to Predict Field Cracking Performance of Cold In-Place Recycling Mixtures
• Bonded Whitetopping Overlay Design Considerations for Prevention of Reflection Cracking, Joint Sealing, and the Use of Dowel Bars
• Calibration of HDM-4 Models for Estimating the Effect of Pavement Roughness on Fuel Consumption for U. S. Conditions
• Evaluation of the Speed Constant and Its Effect on the Calibration of Friction-Measuring Devices
• Expedient Spall Repair Methods and Equipment for Airfield Pavements
• Experimental Short-Wavelength Surface Textures in Portland Cement Concrete Pavements
• Full-Scale Field Testing for Injected Foam Stabilization of Portland Cement Concrete Repairs
• Impact of Wide-Base Single Tires on Pavement Damage
• Measuring Friction of Patterned and Textured Pavements: A Comparative Study
• Mechanistic Interpretation of Braking Distance Specifications and Pavement Friction Requirements
• Network-Level Pavement Roughness Prediction Model for Rehabilitation Recommendations
• Performance of Recycled Hot-Mix Asphalt Overlays in Rehabilitation of Flexible Pavements
• Prediction of Reflection Cracking in Hot-Mix Asphalt Overlays
• Relative Effectiveness of Grooves in Tire and Pavement for Reducing Vehicle Hydroplaning Risk
• Speed Adjustment Factors for Locked-Wheel Skid Trailer Measurements
• Three-Dimensional Finite Element Modeling of Static Tire–Pavement Interaction