01333140

Component

https://doi.org/10.3141/2225-14

http://scholar.google.com...egui&publication_year=2011

Asphalt fatigue lives determined in the laboratory must be shifted to predict the performance of in-service pavements. Determination of the shift factor to be applied constitutes one of the main challenges of flexible pavements design. Experimental data from four sections tested for 28 months at the CEDEX test track provided detailed information regarding accumulation of asphalt fatigue damage as a function of loads and temperature. The data were used to draw conclusions about the damage process and to determine shift factors for two cracking levels in the field. An effort was made to quantify the beneficial effect of rest periods in the field through use of a variable shift factor that incorporates the methodology for studying this effect and the concept of reduced rest period that was developed in NCHRP 9-38 and 9-44. Results showed that rest periods were not only the main factor responsible for the need for shift factors but also the primary explanation for why most damage took place at medium to low temperatures and not during the warmest season. The asphalt fatigue model in the CalME design procedure has been used successfully to reproduce actual performance observed in the tested sections in terms of modulus reduction, which was previously determined from falling weight deflectometer backcalculation.

01359897

11-1382

English

pp 128-136

2011

Transportation Research Record: Journal of the Transportation Research Board

9780309167512

Print

Figures (5) ; Photos (1) ; References (20)

Asphalt pavements; Failure; Fatigue tests; Flexible pavements; Pavement cracking; Pavement design; Pavement performance; Temperature; Test tracks

Rest periods (Materials)

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways

TRIS, TRB, ATRI

Feb 17 2011 5:47PM

• Accelerated Pavement Testing and Gradation-Based Performance Evaluation Method
• Axle Load Power for Pavement Fatigue Cracking: Empirical Estimation and Policy Implications
• Data Collection to Support Implementation of the Mechanistic–Empirical Pavement Design Guide for County Roads
• Development and Validation of Pavement Performance Models for the State of Maryland
• Dynamic Programming and Connected Component Analysis for an Enhanced Pavement Distress Segmentation Algorithm
• Economic Benefits Assessment of Accelerated Pavement Testing Research in California: Case Study
• Evaluating the Benefits of Accelerated Pavement Testing: Techniques and Case Studies
• Impact of Pavement Monitoring Frequency on Pavement Management System Decisions
• Integrated Maintenance and Expansion Planning for Transportation Network Infrastructure
• Linear Mixed-Effects Models for Preliminary Analysis of Flexible Pavement Serviceability Index Data
• New Method for Classifying and Quantifying Cracking of Flexible Pavements in Automated Pavement Condition Survey
• Pavement Shear Strain Response to Dual and Wide-Base Tires
• Performance Modeling of Infrastructure Condition Data with Maintenance Intervention
• Simplified Model of Road-User Costs for Portuguese Highways
• System for Rating Materials-Related Distress of Concrete Airfield Pavements
• Use of Analytic Hierarchy Process to Prioritize Network-Level Maintenance of Pavement Segments with Multiple Distresses