Effects of Recycled Materials on Long-Term Performance of Cold In-Place Recycled Asphalt Roads
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VIEW THE REPLYPublication: Journal of Performance of Constructed Facilities
Volume 24, Issue 3
Abstract
With a limited maintenance budget and unprecedented construction cost increases, many owner/agencies in the United States are beginning to rehabilitate existing distressed pavements. Cold in-place recycling (CIR) provides an economical rehabilitation method and has been widely used in the past 20 years. However, recycled roads have experienced inconsistent performance and that has hindered the application of CIR. The objective of this paper is to study the cause and effect relationships between factors, such as traffic loading, support condition, and aged engineering properties of the CIR materials, and pavement performance. Twenty-four roads in Iowa were examined through field and lab tests. Statistical analyzes show that, within the range of data in this study, better performance was observed on CIR roads with lower CIR modulus value and/or higher air voids.
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Acknowledgments
The writers would like to thank the financial support provided by the Iowa Highway Research Board (IHRB) and the members of the technical advisory committee for their guidance throughout the project.
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Information
Published In
Journal of Performance of Constructed Facilities
Volume 24 • Issue 3 • June 2010
Pages: 275 - 280
Copyright
© 2010 ASCE.
History
Received: Jun 22, 2009
Accepted: Aug 3, 2009
Published online: Oct 5, 2009
Published in print: Jun 2010
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