Asphalt binder modification using in situ grown iron oxide microparticles
Rumaneh F. Salama A. Jasso M. Husein M.
2025Taylor and Francis Ltd.
Road Materials and Pavement Design
2025
This study modified a neat asphalt binder of PG 58-28 grade using in situ grown iron oxide particles. Particle contents of 0.25, 0.5, and 1.0 wt% improved the performance grades to PG 64-28, PG 70-28, and PG 82-28, respectively. The particles enhanced high-temperature properties while maintaining low-temperature performance. At 70 °C, the rutting parameter of the unaged binder increased from 0.33 kPa to 4.29 kPa with 1.0 wt% iron oxide. Multiple Stress Creep Recovery at 58 °C and 3.2 kPa stress showed recovery rising from 0.3% to 65.2% for the 1.0 wt% binder. Recovered particles exhibited polycrystalline γ-iron oxide structure with average size 2–9 μm, depending on content. Unlike ex situ mixing based modification, no particle aggregation was observed. Overall, in situ grown iron oxide particles substantially improved binder performance and outperformed most additives reported in the literature, including nanoparticles.
asphalt binder , In situ , iron oxide , modification , particle , rutting
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Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, Canada
Department of Mechanical and Aerospace Engineering, Nazarbayev University, Astana, Kazakhstan
Bituminous Materials Chair, Department of Civil Engineering, Schulich School of Engineering, University of Calgary, Calgary, Canada
Department of Chemical and Petroleum Engineering
Department of Mechanical and Aerospace Engineering
Bituminous Materials Chair
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Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026