Cold In-Place Recycling Characterization for Single-Component or Multiple-Component Binder Systems
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 11
Abstract
Cold in-place recycling (CIR) is a pavement rehabilitation technique that has been used for decades. During this time, single-component binder (SCB) systems have governed the market. Single-component binders are defined as those with one binder or two if the secondary binder dosage is 1% or less (e.g., 3% asphalt emulsion with 1% hydrated lime). In contrast, this paper investigates multiple-component binder (MCB) systems (e.g., 2.5% emulsion with 2% portland cement). This paper’s objective is threefold: (1) present a universal CIR design framework applicable to any cementitious and/or bituminous material; (2) demonstrate MCB sustainability advantages; and (3) conduct an extensive SCB and MCB characterization. Universal design framework components include specimen preparation, curing, and testing protocols. Nine binder combinations were tested for wheel tracking, permeability, modulus, strength, and cracking response. Cement SCBs yielded low cracking resistance, high rutting resistance, and favorable economics; emulsion SCBs yielded the opposite. Multiple-component binders balanced cracking, rutting, and economics. The work presented in this paper could benefit agencies in many ways, for example, by promoting informed decisions regarding CIR performance and economics.
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Acknowledgments
Thanks are due to MDOT for funding State Study 250. Additional financial support was available through the Ergon Asphalt and Emulsions Distinguished Doctoral Fellowship in Construction Materials held by Ben C. Cox. Thanks are due to Gaylon Baumgardner, Paul Morris, Mike Hemsley, and Trey Jordan of Paragon Technical Services, Inc., and Tim Cost of Holcim (US), Inc., for providing materials and support. Thanks are due to Dr. Don Christensen for providing the LTSTRESS.xls spreadsheet. The University of Florida (specifically Dr. Reynaldo Roque, Dr. Jian Zou, and George Lopp) was very helpful and forthcoming regarding past experiences with cracking characterization testing. Thanks are due to Mississippi State University undergraduate research assistants Chase Hopkins, Drew Moore, and Matt Roddy for assistance with laboratory activities. Permission to publish was granted by the director of Geotechnical and Structures Laboratory.
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 11 • November 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Oct 22, 2015
Accepted: Feb 23, 2016
Published online: May 26, 2016
Discussion open until: Oct 26, 2016
Published in print: Nov 1, 2016
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