Laboratory Investigation of Cement-Treated Reclaimed Asphalt Pavement Material
Publication: Journal of Materials in Civil Engineering
Volume 27, Issue 6
Abstract
Cold in-place recycling is considered as a pavement rehabilitation technique that is more environmentally friendly than the common practice of simply constructing a new hot-mix asphalt (HMA) overlay on the existing wearing surface. This paper describes a laboratory experimental study for the formulation and mechanical characterization of cement-treated reclaimed asphalt pavement (RAP) material to be used as a base layer during the rehabilitation of pavements. RAP content was varied between 0 and 100% in order to study the effects of this parameter on the mechanical properties. Portland cement content was kept constant at 6% by weight of dry constituents. Results have shown that an increase in RAP content results in a decrease in compressive strength, flexural strength, indirect tensile strength, and elastic modulus. However, for any RAP content of 60% or less, acceptable mechanical properties for a pavement base layer were achieved. Unrestrained shrinkage testing showed statistically insignificant change in shrinkage strain with RAP content.
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Acknowledgments
The authors wish to thank Ahmed Balti and Abir Tlich for their help during the performance of the different experimental tests.
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Published In
Journal of Materials in Civil Engineering
Volume 27 • Issue 6 • June 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Oct 3, 2013
Accepted: Jul 1, 2014
Published online: Aug 18, 2014
Discussion open until: Jan 18, 2015
Published in print: Jun 1, 2015
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