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Research on the Performance and Application of High-Performance PE Composite Modified Asphalt
Lei Xia1,2, Qidong Su3, Xiaolong Yang4
1School of Materials Science and Engineering, Chang'an University, Xi'an 710061, China.
Polymers
|February 13, 2025
Summary
Waste polyethylene (PE) is transformed into high-performance polyethylene composite modified asphalt (HPEA), offering superior stability and performance. This innovation provides a high-value solution for plastic waste recycling and road material enhancement.
Area of Science:
- Materials Science
- Polymer Chemistry
- Civil Engineering
Background:
- Global challenge of plastic waste pollution necessitates high-value recycling solutions.
- Traditional plastic-modified asphalt exhibits limitations in stability and low-temperature performance.
- Need for advanced materials to improve asphalt properties and manage waste streams.
Purpose of the Study:
- To prepare high-performance polyethylene composite modified asphalt (HPEA) from waste polyethylene (PE).
- To evaluate HPEA's performance against styrene-butadiene-styrene modified asphalt (SBSMA).
- To achieve high-value utilization of waste plastics through asphalt modification.
Main Methods:
- Preparation of a high-performance polyethylene composite modifier (HPE) via mechanochemical and thermochemical interactions.
- Formulation of HPEA with varying HPE content and SBSMA with varying SBS content.
- Comparative analysis of conventional performance, storage stability, anti-aging properties, and microscopic characteristics.
Main Results:
- HPEA demonstrates conventional performance comparable or superior to SBSMA, with significant asphalt penetration reduction.
- HPEA exhibits excellent storage stability, with minimal softening point variation across different HPE concentrations.
- HPEA shows comparable or superior anti-aging performance to SBSMA at specific HPE concentrations.
Conclusions:
- Waste polyethylene can be effectively utilized to create high-performance modified asphalt (HPEA).
- HPEA offers improved stability and performance over traditional modified asphalt, addressing environmental concerns.
- The modification mechanism involves physical blending and interactions leading to a stable 3D structure.
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