TxDOT Research Project

Use of Recycled Asphalt Shingles in HMA

road paving operation with recycled asphalt
What Was the Need?
In the last several years, both reclaimed asphalt pavement (RAP) and recycled asphalt shingles (RAS) have been widely used in paving Texas highways. Compared to RAP, RAS has two features: 1) much higher asphalt binder content, and 2) super stiff asphalt binder. Thus, the use of RAS can not only reduce the cost of asphalt mix paving significantly, but it also conserves energy and protects the environment. However, the super high stiffness of RAS binder causes strong concern on durability (or cracking performance) of asphalt mixes containing RAS. Another concern was the variability of processed RAS due to different RAS sources varying from manufacture waste shingles to a wide variety of tear-off shingles.

What's the Solution?
To address these two major concerns (variability and durability), in 2010, the Texas Department of Transportation (TxDOT) initiated this research study at the Texas A&M Transportation Institute with objectives to: Define variability of processed RAS. Develop best practices for RAS processing and stockpile management. Evaluate methods of improving cracking performance of RAS mixes in the laboratory. Construct field test sections to validate laboratory test results.

Project Number
0-6614
Status
Completed

link icon Copy link to this project.

Start Date
9/1/2010
End Date
8/31/2013
Performing Institution(s)
Texas A & M Transportation Institute (TTI)
Research Team
RS: Fujie Zhou
Sponsor
Page:
Functional Area
Construction and Maintenance
Index Terms
Asphalt mixtures
Asphalt shingles
Binders
Hot mix asphalt
Mix design
Pavement performance
Recycled asphalt pavements
Recycled materials
Shingles
Warm mix paving mixtures
Lead University
TTI
Researcher
Zhou, Fujie
See Also
Page:

Registered users may add comments. Comments will be shown with usernames.

Comments
Record Added:
3/17/2015
Record Updated:
1/25/2022 5:32 AM EST

Report a broken link or error ».

Library
Home | Catalog | News | About | Privacy Statement

Made possible by the generous support of the
Texas Department of Transportation Research and Technology Implementation Division (RTI)


Center for Transportation Research | Cockrell School of Engineering | The University of Texas at Austin

©2024 Center for Transportation Research | Web Accessibility Policy | Web Privacy Policy