01552720

Component

https://doi.org/10.3141/2524-12

This paper aims to evaluate flexible pavement responses and performance affected by variations in the aggregate base layer properties. An advanced three-dimensional finite element (FE) model was developed to capture the nonlinear cross-anisotropic behavior of granular material. The FE model characterized the hot-mix asphalt layer as a viscoelastic material and used moving load to predict time- and temperature-dependent pavement responses under different temperatures (25°C and 45°C). Two asphalt pavement sections with different asphalt layer thicknesses (3 and 5 in.) were analyzed, considering variations in aggregate properties. The response changes in the asphalt layer, aggregate base layer, and subgrade depended on the interaction between viscoelastic asphalt layer and stress-dependent aggregate base layer. Fatigue cracking and subgrade rutting were more affected by changes of aggregate base layer properties among different failure mechanisms in each pavement layer. The coefficient of curvature and complex maximum dry density served as the contributing parameters most affecting fatigue cracking potential, especially for the relatively thinner asphalt pavement at the higher temperature. However, the moisture content ratio affected the subgrade rutting potential more than other parameters did. These conclusions serve as the basis for selecting optimum aggregate properties for pavement design and developing a performance-related specification for quality control and quality assurance in pavement construction.

01593959

15-4877

English

pp 119–129

2015

Transportation Research Record: Journal of the Transportation Research Board

9780309369534

Print

Figures (7) ; References (26) ; Tables (2)

Aggregates; Base course (Pavements); Fatigue cracking; Finite element method; Flexible pavements; Mathematical models; Moisture content; Pavement design; Pavement performance; Rutting; Subgrade (Pavements)

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

TRIS, TRB, ATRI

Dec 30 2014 1:37PM

• Achieving Safer Roads Through the Use of System Dynamics and Porous Friction Courses
• Alternative Source of Climate Data for Mechanistic–Empirical Pavement Performance Prediction
• Calibration of National Rigid Pavement Performance Models for the Pavement Mechanistic–Empirical Design Guide
• Characterization of Load Transfer Behavior for Bonded Concrete Overlays on Asphalt
• Comparison of Full-Depth Reclamation with Portland Cement and Full-Depth Reclamation with No Stabilizer in Accelerated Loading Test
• Comprehensive Model for Fatigue Analysis of Flexible Pavements Considering Effects of Dynamic Axle Loads
• Development of Predictive Models for Initiation and Propagation of Field Transverse Cracking
• Effects of Binder, Curing Time, Temperature, and Trafficking on Moduli of Stabilized and Unstabilized Full-Depth Reclamation Materials
• Evaluation and Implementation of PG 76-22 Asphalt Rubber Binder in Florida
• Initial Performance of Virginia’s Interstate 81 In-Place Pavement Recycling Project
• Investigation of Different Methods for Obtaining Asphalt Mixture Creep Compliance for Use in Pavement Mechanistic–Empirical Design Software
• Life-Cycle Cost–Based Decision Framework for Failed Portland Cement Concrete Pavement Materials in Indiana
• Mechanism of Transverse Crack Development in Continuously Reinforced Concrete Pavement at Early Ages
• State Design Procedure for Rigid Pavements Based on the AASHTO Mechanistic–Empirical Pavement Design Guide