Improvement in rheological properties of polymer-modified asphalt binder through sulfur addition using traditional and advanced analyses
Source abstract
Abstract
The use of crosslinking agents, particularly sulfur, addresses compatibility issues in Polymer-modified binders (PmB), impacting storage stability and rheological properties. Through comprehensive rheological assessments, including Superpave grading and advanced techniques such as Glover-Rowe, master curves, Arrhenius and Power-law models, this study aimed to provide a deeper understanding of the role of sulfur as a crosslinking agent between asphalt and styrene-butadiene copolymer (SB), investigating its influence on the durability and performance of the asphalt binder. Results show sulfur levels up to 0.3%, enhanced PmB's elasticity, resistance to shear deformation, rutting, low-temperature cracking, and fatigue, making it suitable for a wider range of climatic conditions and heavier traffic levels. Beyond this threshold, the binder became very stiff and less workable, suggesting the potential onset of gelation. An optimal sulfur content in PmB enhanced compatibility, rheological properties, and overall efficiency of binder modification, potentially reducing polymer modification costs.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Asphalt Pavement Performance Evaluation · Polymer Nanocomposites and Properties · Infrastructure Maintenance and Monitoring
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Iowa State University
Federal University of Ceará
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