International Airfield and Highway Pavements Conference 2019
Effect of Thin Overlays on the Structural Performance of Cold Recycled Bases for High Traffic Volume Roads
Publication: Airfield and Highway Pavements 2019: Design, Construction, Condition Evaluation, and Management of Pavements
ABSTRACT
Over the past decades, several studies have been performed on prolonged pavement life and low-cost preservation and rehabilitation techniques. Cold recycling of asphalt concrete pavements is a widely practiced technique adopted by different agencies over the United States. Thin overlays are popular due to their long-life, low life cycle cost, engineered material selection, smooth surface finish, low noise, and minimum closure time. The National Center for Asphalt Technology (NCAT) has constructed several test sections as part of its Pavement Preservation Study along highway US-280 near Opelika, Alabama. These high-traffic volume test sections were constructed in 2015 and have been in service for approximately 36 months. In this paper, combinations of cold recycled bases and thin overlays were subjected to deflection testing over time and the effect of the treatments over the structural response parameters are analyzed. For the pavement responses, deflection basin parameters, composite pavement modulus, and effective structural number were analyzed for thin overlays placed on cold central plant (CCPR) and cold in-place (CIR) recycled bases, both using emulsion and foaming technologies. All the observed values were compared to control (untreated) sections. The study demonstrates the suitability of thin overlays on cold recycled bases by evaluating the structural performance and overall condition of the pavement test sections over time.
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ACKNOWLEDGEMENT
The authors would extent cordial thanks to the Departments of Transportation of Alabama, Colorado, Georgia, Illinois, Kentucky, Michigan, Minnesota, Mississippi, Missouri, New York, South Carolina, Oklahoma, Tennessee, and Wisconsin, and FP2 Inc. for their sponsorship of this project.
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Information & Authors
Information
Published In
Airfield and Highway Pavements 2019: Design, Construction, Condition Evaluation, and Management of Pavements
Pages: 198 - 207
Editors: Imad Al-Qadi, Ph.D., University of Illinois, Urbana-Champaign, Hasan Ozer, Ph.D., University of Illinois, Urbana-Champaign, Andreas Loizos, Ph.D., National Technical University of Athens, and Scott Murrell, Applied Research Associates
ISBN (Online): 978-0-7844-8245-2
Copyright
© 2019 American Society of Civil Engineers.
History
Published online: Jul 18, 2019
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