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This research assesses the effects of a recycling agent on the performance of cold recycled asphalt mixtures.

March 15, 2026InfrastructuresOpen Access

Effect of a Recycling Agent on Binder and Mixture Performance of Cold Recycled Asphalt Mixes: A Dual-Scale Evaluation with Variability Assessment

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This research assesses the effects of a recycling agent on the performance of cold recycled asphalt mixtures.
Evaluated the influence of slack wax on full-depth reclamation mixtures with bitumen emulsion.
Conducted a dual-scale evaluation including chemical and rheological binder-scale characterization as well as mixture-scale performance assessment.
Used binder beam rheometer and dynamic shear rheometer to characterize low and high-temperature properties of the binder.
The 10% recycling agent improved low-temperature properties significantly.
Complex modulus showed a decrease in stiffness at lower temperatures, indicating enhanced elastic dominance.
The addition of the recycling agent maintained rutting resistance below 3% after 30,000 cycles.

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Analysis reveals the recycling agent enhances viscoelastic properties in cold recycled asphalt mixes, suggesting improved cold performance.

Noura et al. (2026) studied this question.

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Analysis reveals the recycling agent enhances viscoelastic properties in cold recycled asphalt mixes, suggesting improved cold performance.