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Asphalt Rheology: Effect of Polymer Modification

Polymer modification is widely used to enhance the rheological performance of asphalt binders. Polymers such as SBS, SBR, and EVA modify the viscoelastic nature of asphalt by forming network structures that increase elasticity and stiffness while reducing temperature susceptibility. Rheological tests, particularly with the Dynamic Shear Rheometer (DSR), show that polymer-modified asphalt (PMA) exhibits higher complex modulus (G*) and lower phase angle (δ), indicating improved resistance to rutting and better recovery under repeated loading. The broadened linear viscoelastic range and enhanced stress recovery in MSCR tests further confirm its superior high-temperature performance and flexibility at low temperatures. However, achieving stable dispersion and compatibility between polymer and asphalt remains a technical challenge. Ongoing research focusing on rheology-based design and polymer–asphalt interactions aims to optimize these materials for long-term durability and improved pavement performance under various climatic and traffic conditions.

Dr. Simon Cui (Language: English)
Simon Cui

Simon holds a Ph.D. in Chemical Engineering from Texas A&M University and a B.S. from Tsinghua University, and he completed postdoctoral research in Civil Engineering at Purdue University. With more than eight years of academic research in asphalt chemistry and rheology, followed by nearly ten years of industrial experience in the paving and roofing sectors, he has developed strong expertise in asphalt product development and performance evaluation. His research and professional work focus on understanding the relationship between asphalt components and rheological behavior, aiming to improve the durability, sustainability, and long-term performance of asphalt-based materials.