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This research aims to enhance the durability and viscosity characteristics of rubber-modified asphalt in cold, arid regions.

May 10, 2026Applied SciencesOpen Access

Research on Performance Optimisation and Viscosity-Reduction Mechanisms of Warm-Mix Rubber Asphalt Pavement Materials in Cold and Arid Regions

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This research aims to enhance the durability and viscosity characteristics of rubber-modified asphalt in cold, arid regions.
Examined the influence of processing conditions on viscosity reduction.
Optimized warm-mix rubber-modified asphalt through rheological testing.
Utilized scanning electron microscopy, fluorescence microscopy, and infrared spectroscopy for microscopic analysis.
Optimal viscosity reduction achieved with 40-mesh rubber at a 5:1 activator ratio and 220 °C for 50 h.
5% cracked rubber provides the best performance with excellent high-temperature stability and low-temperature crack resistance.
Warm-mix process reduces production temperature by 40–60 °C and lowers viscosity by approximately 30% compared to conventional asphalt.

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Randomized trial optimizes viscosity reduction in rubber-modified asphalt, suggesting improved performance in harsh climates.

Wei et al. (2026) studied this question.

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