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Determination of the Friction Coefficients of Icy Pavements Under Different Amounts of Snowfall
Published on: January 6, 2023
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Study on the performance of PU-SBS composite modified asphalt
1Shaanxi Agricultural Development Group, Ltd., Xi'an, 710075, China. sunhangeng777@163.com.
Scientific Reports
|October 24, 2025
Summary
This study developed a composite-modified asphalt using polyurethane (PU) and styrene-butadiene-styrene (SBS) to enhance the durability and low-temperature performance of poroelastic road surfaces (PERSs). The new material offers improved flexibility and stability for quieter, more resilient pavements.
Area of Science:
- Materials Science
- Civil Engineering
- Polymer Science
Background:
- Poroelastic road surfaces (PERSs) offer excellent noise reduction but suffer from poor durability.
- Improving the low-temperature performance and durability of PERSs is crucial for practical application.
- A novel composite-modified asphalt is needed to address these limitations.
Purpose of the Study:
- To develop a composite-modified asphalt combining polyurethane (PU) and styrene-butadiene-styrene (SBS) to enhance both low-temperature performance and durability.
- To investigate the micro-modification mechanism of the PU-SBS composite asphalt.
- To provide a material foundation for improved poroelastic road surface pavements.
Main Methods:
- Modification of 90# matrix asphalt with PU and SBS to create a composite material.
- Evaluation of basic properties including penetration, ductility, softening point, segregation, and aging.
- Rheological assessment using dynamic shear rheometer (DSR) and bending beam rheometer (BBR) at various temperatures.
- Microscopic analysis using fluorescence microscopy and atomic force microscopy.
Main Results:
- The PU-SBS composite-modified asphalt demonstrated significantly enhanced low-temperature ductility compared to matrix asphalt.
- Excellent high-temperature performance and fatigue resistance at medium temperatures were maintained.
- Microscopic analysis revealed a stable composite system formed through chemical reactions, indicating good storage stability.
- The modified asphalt effectively balances strength and flexibility.
Conclusions:
- The developed PU-SBS composite-modified asphalt provides a viable solution to improve the durability and low-temperature performance of poroelastic road surfaces.
- The synergistic effects at the microscopic level offer a theoretical basis for designing advanced modified asphalts.
- This research presents a technical solution for the wider implementation of environmentally friendly and noise-reducing pavements.
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