Rational Mix-Design Procedure for Cold In-Place Recycling Asphalt Mixtures and Performance Prediction
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 6
Abstract
A new volumetric mix-design procedure utilizing the Superpave gyratory compactor (SGC) was developed for cold in-place recycling (CIR) asphalt mixtures with assistance from the Federal Highway Administration (FHWA). It was developed for partial-depth CIR using asphalt emulsions as the recycling additive. This procedure was calibrated using materials from five geographically varied locations in North America: Connecticut, Kansas, Ontario, Arizona, and New Mexico. It required that specimens be prepared at densities similar to those found in the field. The performance of CIR mixtures prepared in accordance with the new mix-design procedure was evaluated in the laboratory with mechanistic-empirical pavement design guide (MEPDG) models as well as in the field. Creep compliance and strength of the mixtures were determined at 0, , and using the Superpave indirect tensile tester (IDT) with satisfactory results. A field test section also had been established with CIR mixtures in Arizona using this procedure and has been performing well with no significant visible cracking or distresses.
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Acknowledgments
The research project has been funded by FHWA through the University of New Hampshire (UNH). The authors would like to express our sincere thanks for their support, encouragement, and guidance, especially Professor David Gress of UNH. The authors would also like to thank the members of the Expert Task Group for their time and effort in helping make this a successful and useful research endeavor. In addition, thanks must go to Mr. Fred Nashold of the Connecticut DOT, who supplied the field data. The authors also thank Dr. William Buttlar of the University of Illinois at Urbana-Champaign and Dr. Don Christensen of Advanced Asphalt Technologies, LLC for their help with the IDT data. The unending contributions of Mrs. Gail Paolino are also greatly appreciated. The authors would also like to thank CVE faculty and staff for their contributions and many graduate and undergraduate assistants who assisted with the project, particularly Ms. Christina Steen and Dr. Kyungwon Park.
References
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 6 • June 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Apr 7, 2015
Accepted: Sep 28, 2015
Published online: Jan 5, 2016
Published in print: Jun 1, 2016
Discussion open until: Jun 5, 2016
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