01550205

Component

https://doi.org/10.3141/2524-01

The Florida Department of Transportation (DOT) has had a long history of recycling ground tire rubber (GTR) from waste tires in highway projects. The Florida DOT first experimented with asphalt rubber binder (ARB) more than 35 years ago. In 1988, the Florida legislature mandated the investigation of using recyclable materials such as GTR in roadway construction. For more than 25 years, the Florida DOT has effectively satisfied the intent of the legislature. However, the ARB has often been associated with unpredictable performance and handling issues, such as the separation of the GTR from the binder. These performance and handling issues have resulted in higher construction costs and have made ARB less appealing because a more reliable alternative, PG 76-22 polymer modified asphalt (PMA), is available. As a result, a task team of the Florida DOT and industry members was formed with the goal of finding a way to make ARB handle and perform similarly to PG 76-22 (PMA), Florida’s gold standard binder. This paper documents an accelerated pavement testing (APT) study to compare hot-mix asphalt mixtures constructed with PG 76-22 (PMA) and PG 76-22 (ARB). This APT study represents the final stage of the implementation of a new PG 76-22 (ARB) specification.

01593959

15-3261

English

pp 1–10

2015

Transportation Research Record: Journal of the Transportation Research Board

9780309369534

Print

Figures (7) ; Photos; References (17) ; Tables (6)

Accelerated tests; Asphalt rubber; Hot mix asphalt; Polymer asphalt; Specifications

Florida Department of Transportation

Florida

Highways; Materials; Pavements

PRP, TRIS, TRB, ATRI

Dec 30 2014 1:05PM

• 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 of Effects of Variations in Aggregate Base Layer Properties on Flexible Pavement Performance
• 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