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Investigating the Performance of Asphalt Modified with Rubber Powder and Surface Organic Layered Double Hydroxides
Chenze Fang1,2,3, Xu Guo1, Yuanzhao Chen1,2,3
1School of Civil Engineering and Transportation, North China University of Water Resources and Electric Power, Zhengzhou 450045, China.
Gels (Basel, Switzerland)
|July 27, 2026
Summary
This study optimized asphalt modification using waste tire rubber powder (RP) and surface organic layered double hydroxide (SOM-LDHs). The composite-modified asphalt demonstrated superior high and low-temperature performance and aging resistance.
Area of Science:
- Materials Science
- Civil Engineering
- Sustainable Engineering
Background:
- Road engineering requires sustainable materials to improve asphalt performance.
- Waste tire rubber powder (RP) and layered double hydroxides (LDHs) are potential modifiers.
- Optimizing the combination of RP and SOM-LDHs is crucial for enhanced asphalt properties.
Purpose of the Study:
- To optimize the preparation parameters for composite-modified asphalt using RP and SOM-LDHs.
- To evaluate the high and low-temperature rheological properties and aging resistance of the modified asphalt.
- To promote sustainable development in road engineering through waste material utilization.
Main Methods:
- Box-Behnken design response surface methodology for parameter optimization.
- Rheological testing using Dynamic Shear Rheometer (DSR) and Bending Beam Rheometer (BBR).
- Microstructural and aging analysis via SEM, AFM, FTIR, and GPC.
Main Results:
- Optimized formula: 21.7% RP, 4.8% SOM-LDHs, 160 °C shear temperature.
- Composite-modified asphalt showed a 27.35% higher complex shear modulus after aging.
- Significantly improved high-temperature rutting resistance and low-temperature stress relaxation.
Conclusions:
- The combination of RP and SOM-LDHs effectively enhances asphalt's high and low-temperature performance and aging resistance.
- Optimized composite-modified asphalt offers superior durability and sustainability for road engineering applications.
- This approach provides a viable method for recycling waste tires and developing advanced road materials.
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