Abstract
Pavement sustainability draws attention from different stakeholders in recent years. Warm mix asphalt (WMA) incorporating reclaimed asphalt pavement (RAP) or reclaimed asphalt shingles (RAS) has been widely recognized as a sustainable combo for pavement construction by conserving natural resources and reducing greenhouse gas emission. However, as their usage surges, little research has been conducted to date through a comprehensive laboratory and field evaluation to verify the performance of WMA incorporating RAP and RAS compared to traditional hot mix asphalt (HMA). In this research, five WMA sections with different WMA techniques and one control HMA section constructed in Oklahoma were continuously monitored for four years. The aggregate consensus, source, and gradation properties were tested in the laboratory. Mixture characteristics for lab-compacted samples including cracking resistance, rutting performance, moisture susceptibility, and water permeability were measured to compare WMA to HMA incorporating RAP and RAS. In addition, pavement surface conditions in terms of pavement cracking, rutting, roughness, texture, and friction were collected from the field site ten times in four years by using several state-of-the-art high-speed devices without traffic control. The laboratory and four-years field monitoring results demonstrate that WMA incorporating RAP and RAS accomplishes desired performance while providing sustainable benefits.
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Acknowledgments
The research presented in the paper was funded under the research project SP&R 2115, “Long Term Pavement Performance (LTPP) Monitoring of Six LTPP SPS-10 Sections in Oklahoma with 3D Laser Imaging”, sponsored by the Oklahoma Department of Transportation (ODOT). The opinions expressed in the paper are those of the authors, who are responsible for the accuracy of the presented data herein and do not necessarily reflect the official policies of the sponsoring agencies. This paper does not constitute a standard, regulation, or specification.
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Yang, G., Wang, K., Li, J.Q. et al. Laboratory and Field Performance Evaluation of Warm Mix Asphalt Incorporating RAP and RAS. KSCE J Civ Eng 26, 107–119 (2022). https://doi.org/10.1007/s12205-021-2315-8
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DOI: https://doi.org/10.1007/s12205-021-2315-8