Evaluation of Asphalt Concrete Performance Using the Hot In-Place Asphalt Recycling Method: The Case Study of Road Segments in Al-Ain, Abu Dhabi, United Arab Emirates
Received: 4 March 2025 | Revised: 8 April 2025 | Accepted: 12 April 2025 | Online: 2 August 2025
Corresponding author: Mohammed Hussein Saeed
Abstract
materials, such as Reclaimed Asphalt Pavement (RAP), are utilized as components in asphalt mixtures. The RAP material employed in this study was obtained from the peeling of an old pavement on Zayed Bin Sultan Road from Al Bawadi Mall to Military Roundabout Al Ain, Abu Dhabi, United Arab Emirates (UAE). After its removal, RAP underwent the Hot In-Place Recycling (HIR) method. The findings were then compared with those of the conventional method. This study used 12% RAP in the Recycled Asphaltic Concrete-Wearing Course (RAC-WC) mixture. A total of 3 AC-WC mixtures were tested, with bitumen content percentages of 3.7%, 3.9%, and 4.1%. The Marshall Stability test results showed that the stability values followed a pattern involving four separate phases: Initial load adjustment, linear elastic deformation, nonlinear inelastic deformation, and post-peak stress region. The highest Marshall Stability value, 16550 N, was achieved for the mix with 3.9% bitumen content. The stability and elasticity values using HIR were higher than those obtained by deploying the conventional method.
Keywords:
HIR, stability, flow, elasticity, AC-WCReferences
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Copyright (c) 2025 Mohammed Hussein Saeed, Muralia Hustim, Muhammad Wihardi Tjaronge, Sumarni Hamid Aly
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