Field Assessment of Cold In-Place Recycled Asphalt Mixtures Using Accelerated Pavement Testing
Publication: Journal of Transportation Engineering, Part B: Pavements
Volume 148, Issue 3
Abstract
The objective of this study was to assess the performance of full-scale cold in-place recycled (CIR) asphalt sections using accelerated pavement testing (APT). A balanced mix design approach was followed to optimize the binder contents of CIR mixtures, and these mixtures were subsequently used to construct three full-scale sections (7.6 by 3.7 m) at Rowan University’s Accelerated Pavement Testing Facility. Foamed asphalt was added in varied contents: 2%, 3%, and 4% by total mix weight. All CIR mixtures were prepared at a constant water content of 3%. Each full-scale section was instrumented with asphalt strain gauges, pressure cells, and thermocouples to evaluate the structural responses within each section. A heavy vehicle simulator (HVS) was utilized to apply accelerated loading on each full-scale pavement section. A truck tire was utilized to apply a 40-kN load while an aircraft tire was utilized to apply a 100-kN load. As accelerated loading was applied, a number of field tests and visual inspections were performed to determine (1) permanent deformation using a surface profiler, (2) the structural integrity using a heavy weight deflectometer before and after APT, and (3) cracking potential by assessing stress and strain responses. The results showed that the CIR section with 2% binder content presented the best rutting performance under truck loading and the highest rutting susceptibility under aircraft loading. Conversely, the CIR section with 3% binder content presented the highest cracking resistance under accelerated truck and aircraft loading.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The experiments described and the resulting data presented herein, unless otherwise noted, were funded under PE 0602784A, Project T53 “Military Engineering Applied Research,” Task 08 under Contract W913E517C0010, managed by the US Army Engineer Research and Development Center (ERDC). The work described in this paper was conducted at Rowan University’s Center for Research and Education in Advanced Transportation Engineering Systems (CREATEs), Mullica Hill, New Jersey. Permission was granted by the director of the Geotechnical and Structures Laboratory to publish this information. The authors confirm contribution to the paper as follows: study conception and design: Ayman Ali, Ahmed Saidi, and Yusuf Mehta; data collection: Ahmed Saidi; data analysis: Ahmed Saidi, Ayman Ali, Yusuf Mehta, Christopher Decarlo, and Mohamad Elshaer; draft manuscript preparation: Ahmed Saidi, Ayman Ali, and Yusuf Mehta. All authors reviewed the results and approved the final version of the manuscript.
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Received: Aug 19, 2021
Accepted: Feb 26, 2022
Published online: Apr 26, 2022
Published in print: Sep 1, 2022
Discussion open until: Sep 26, 2022
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