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Investigation on the Fatigue and Rutting Behavior of Asphalt Binder Containing Compound Warm Mixing Agent
Qinghong Fu1, Tingting Chang1, Qing Yang1
1College of Engineering, Zhejiang Normal University, Jinhua 321004, China.
Materials (Basel, Switzerland)
|May 27, 2026
Summary
A new warm-mix additive (PNSK) enhances asphalt workability and performance. The optimal dosage of 11% improves fatigue resistance and reduces permanent deformation, crucial for durable road construction.
Area of Science:
- Materials Science
- Civil Engineering
- Chemical Engineering
Background:
- Warm-mix asphalt (WMA) technology aims to reduce production temperatures, lowering emissions and energy consumption.
- Improving asphalt binder workability and performance at various temperatures is critical for pavement durability.
Purpose of the Study:
- To develop and evaluate a composite warm-mix additive (PNSK) for asphalt binders.
- To optimize the dosage of PNSK for enhanced workability and balanced rheological performance.
- To assess the impact of PNSK on asphalt binder properties, adhesion, fatigue, and permanent deformation resistance.
Main Methods:
- Development of a composite warm-mix additive (PNSK).
- Analysis of warm-mix asphalt binders (PWMA) using conventional tests and rheological analysis (LAS, MSCR).
- Evaluation of asphalt-aggregate adhesion strength at varying PNSK dosages.
Main Results:
- PNSK improved penetration, softening point, and ductility.
- Optimal PNSK dosage was determined to be 11%, balancing viscosity reduction and adhesion.
- 11% PWMA showed enhanced fatigue resistance and reduced permanent deformation, especially at high temperatures.
- Adhesion strength decreased significantly beyond 11% PNSK, with 12% as a critical threshold.
Conclusions:
- The composite warm-mix additive (PNSK) effectively improves asphalt binder properties.
- An 11% dosage of PNSK offers optimal performance, enhancing workability, fatigue life, and resistance to permanent deformation.
- While WMA technology shows temperature-strain sensitivity, the developed additive provides significant benefits for asphalt pavement engineering.
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