01158073

Component

https://doi.org/10.3141/2181-06

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

Thermal stress on the surfaces of pavements located in mild climates has been commonly considered to have a negligible effect on pavement performance. Current pavement design methodology focuses on maximum tensile stress rather than tensile stresses occurring over the design life of pavements. To identify the significance of thermal stress on pavement performance through structural stress analysis, this study investigated the predictive capability of the enhanced integrated climate model by comparing it with measured temperature data and introducing an analytical methodology of estimating thermal stress development using the dynamic modulus test. The identified thermal stresses were compared with the tensile stresses occurring at the bottom of an asphalt layer through the analysis method employed in the "Guide for Mechanistic–Empirical Design of New and Rehabilitated Pavement Structures." Damage caused by the thermal and bottom stresses was evaluated on the basis of the damage ratio derived from the hot-mix asphalt fracture model. The conclusion drawn from the investigations was that the effect of thermal stress on pavement cracking performance, evaluated through the damage analysis considering the time- and temperature-dependent nature of asphalt mixtures, is much less significant than that of bottom stress under mild climate conditions. Under the nonaging condition, 1-year average damage occurring due to thermal stress at typical pavement structures would be slightly less than 0.5% of that which would be expected to occur at the bottom.

01328240

10-2123

English

pp 44-54

2010

Transportation Research Record: Journal of the Transportation Research Board

9780309160551

Print

Figures (9) ; References (26)

Asphalt mixtures; Asphalt pavements; Climate; Dynamic modulus of elasticity; Pavement cracking; Pavement performance; Surface course (Pavements); Thermal stresses

Enhanced Integrated Climate Model; Mechanistic-Empirical Pavement Design Guide

Damage analysis; Tensile stresses

Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Jan 25 2010 10:58AM

• Characterization of Permanent Deformation of Asphalt Mixtures Based on Shear Properties
• Development of a Flow Number Predictive Model
• Development of Artificial Neural Network Predictive Models for Populating Dynamic Moduli of Long-Term Pavement Performance Sections
• Estimate of Fatigue Shift Factors Between Laboratory Tests and Field Performance
• Estimation of Stress Conditions for the Flow Number Simple Performance Test
• Fénix Test: Development of a New Test Procedure for Evaluating Cracking Resistance in Bituminous Mixtures
• Fatigue Crack Propagation Model of Asphalt Concrete Based on Viscoelastic Fracture Mechanics
• Multiscale Modeling to Predict Mechanical Behavior of Asphalt Mixtures
• Rutting Resistance of Laboratory-Prepared and Field-Compacted Asphalt Mixtures
• Semiempirical, Analytical, and Computational Predictions of Dynamic Modulus of Asphalt Concrete Mixtures
• Stiffening Mechanisms of Asphalt–Aggregate Mixtures: From Binder to Mixture
• Use of Nonuniform Stress-State Tests to Determine Fracture Energy of Asphalt Mixtures Accurately