01476004

Component

https://doi.org/10.3141/2368-14

http://scholar.google.com....+Li&publication_year=2013

Development of design procedures for bonded whitetopping overlays has been based on the assumption that failure mechanisms are a function of overlay thickness; namely, thin whitetopping results in longitudinal cracking and ultrathin whitetopping results in corner cracking. However, field data from whitetopping sections indicate that failure modes are dictated by slab size rather than overlay thickness. The revised procedure presented here for thin whitetopping and ultrathin whitetopping offers four primary enhancements to the Portland Cement Association and Colorado Department of Transportation procedures that traditionally have been used: (a) the failure mode is dictated by the joint spacing and not the overlay thickness, (b) the stress adjustments factors have been calibrated with an extensive data set, (c) the equivalent gradients to be used as the design input are defined according to the pavement structure and geographical location of the project and, (d) the effect of temperature change on hot-mix asphalt stiffness is considered. Comparisons of the predicted performance for the revised procedure with the actual performance for four separate projects showed that the predicted thicknesses are reasonable. It was also found that the predicted thickness obtained with the revised procedure was sensitive to the thickness of hot-mix asphalt, the level of traffic, and the modulus of rupture of the portland cement concrete, as expected.

01519019

13-4718

English

pp 145–153

2013

Transportation Research Record: Journal of the Transportation Research Board

9780309287104

Print

Figures (7) ; References (10) ; Tables (3)

Hot mix asphalt; Overlays (Pavements); Pavement design; Pavement joints; Pavement performance; Spacing; Stresses; Thickness; Thinness; Whitetopping

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces

PRP, TRIS, TRB, ATRI

Feb 5 2013 12:55PM

• Assessment of Reliability and Load Factor Design Approach Against Fatigue Cracking in Flexible Pavements
• Combined Effect of Three-Dimensional Contact Load and Thermal Gradients on the Cracking Performance of Heavy-Duty Asphalt Pavements
• Development of Full-Scale Reflective Cracking Test at the FAA National Airport Pavement Test Facility
• Evaluation of Long-Lasting Perpetual Asphalt Pavement with Life-Cycle Cost Analysis
• Framework for Determining Load Equivalencies with DARWin-ME
• Global Sensitivity Analysis of Mechanistic–Empirical Performance Predictions for Flexible Pavements
• Improvements of Full-Depth Repair Practices for Distresses in Continuously Reinforced Concrete Pavement
• Investigation and Modification of Available Mechanistic–Empirical Procedures for Reflective Cracking in Asphalt Overlays of Concrete Pavements
• Investigation into Top-Down Cracking of Asphalt Pavements in North Carolina
• Performance Prediction Models for Cracked, Seated, and Overlaid Concrete Pavements in California
• Redefining the Failure Mode for Thin and Ultrathin Whitetopping with 1.8- × 1.8-m Joint Spacing
• Responses and Performance of Stabilized Full-Depth Reclaimed Pavements at the Minnesota Road Research Facility
• Use of the Mechanistic–Empirical Pavement Design Guide and CalME to Mitigate Rutting in Asphalt Overlays of Concrete Pavements