01337180

Component

https://doi.org/10.3141/2210-01

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

The hot-mix asphalt (HMA) rutting prediction model in the Mechanistic–Empirical Pavement Design Guide (MEPDG) uses a relationship that includes the effects of mix characteristics only through the resilient strain, which in turn is a function of the dynamic modulus (|E*|) of the mix. However, increasing evidence suggests that the use of |E*| alone may be insufficient to characterize completely the permanent deformation behavior of HMA. In addition to effects already considered by the MEPDG model with |E*|, the effects of mix characteristics on permanent deformation are analyzed with the use of the results of repetitive axial permanent deformation tests from laboratory-compacted HMA specimens. Results of multiple linear regression analysis indicate that binder type, effective binder content, and air void content have significant effects on model parameters for permanent deformation. The potential effects of mix characteristics on these parameters are analyzed with the use of the MEPDG model and an HMA pavement section with four levels of compaction. Scenarios in which the mixture characteristics are incorporated solely by means of |E*| are compared with scenarios in which the effects of air void content and asphalt content are incorporated into the rutting prediction model by adjusting its parameters according to relationships established in the laboratory. Empirical laboratory evidence supports the hypothesis that, regardless of mixture properties, universal values for permanent deformation model parameters do not fully account for mixture-specific contributions to rutting and that other mix characteristics (e.g., air void content) may be needed to supplement |E*| for the appropriate characterization of the permanent deformation of asphalt mixtures.

01356813

11-1784

English

pp 1-8

2011

Transportation Research Record: Journal of the Transportation Research Board

9780309167468

Print

Figures (1) ; References (14) ; Tables (4)

Air voids; Asphalt mixtures; Binder content; Dynamic modulus of elasticity; Hot mix asphalt; Mix design; Rutting

Mechanistic-Empirical Pavement Design Guide

Highways; Materials; Pavements; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Feb 17 2011 5:55PM

• Determination of Crack Size Distribution in Asphalt Mixtures
• Determination of Flow Number in Asphalt Mixtures from Deformation Rate During Secondary State
• Effect of Thermal Stresses on Fatigue Behavior in Bituminous Mixes
• Effects of Nonuniform and Three-Dimensional Contact Stresses on Near-Surface Cracking
• Evaluation of Dynamic Modulus Predictive Equations for Southeastern United States Asphalt Mixtures
• Evaluation of Fracture Toughness of Semirigid Asphalt Concretes at Low Temperatures
• Evaluation of Predictive Models for Estimating Dynamic Modulus of Hot-Mix Asphalt in Oklahoma
• Factors That Affect Cracking Performance in Hot-Mix Asphalt Mix Design
• Laboratory Evaluation of Asphalt Binders and Mixtures Containing Polyphosphoric Acid
• Permanent Deformation Model Based on Shear Properties of Asphalt Mixtures: Development and Calibration
• Reduced Testing Protocol for Measuring the Confined Dynamic Modulus of Asphalt Mixtures
• Search for a Laboratory Test to Evaluate Crack Resistance of Hot-Mix Asphalt
• Significance of Confined Dynamic Modulus Laboratory Testing for Asphalt Concrete: Conventional, Gap-Graded, and Open-Graded Mixtures