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Influence of Waste Toner on Asphalt Binder: Chemical and Rheological Characterization
Prince Igor Itoua1, Daquan Sun1, Ping Li2
1Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, 4800 Cao'an Road, Shanghai 201804, China.
Molecules (Basel, Switzerland)
|March 29, 2023
Summary
Waste toner can be repurposed to enhance asphalt binder properties, improving high and low-temperature performance and rutting resistance. This study confirms waste toner
Area of Science:
- Materials Science
- Environmental Engineering
- Civil Engineering
Background:
- Growing waste toner (WT) volumes present environmental concerns.
- WT's primary components, Styrene-acrylic copolymer and carbon black, show potential for asphalt modification.
Purpose of the Study:
- To evaluate the chemical and rheological properties of waste toner-modified asphalt (TMA) binders.
- To determine the feasibility of using waste toner for asphalt modification.
Main Methods:
- Blending base asphalt with two waste toners of varying gradation sizes.
- Utilizing microscopic analyses (XRF, ATR-FTIR, SEM-EDS, fluorescence microscopy).
- Conducting rheological tests (MSCR, oscillation, bending beam rheometer).
Main Results:
- FTIR confirmed chemical reactions between waste toner and asphalt binder.
- A fluorescence effect was observed in the modified binders.
- Optimal 8% waste toner content improved high/low-temperature properties, upgrading PG70-22 to PG76-22.
- Rutting resistance and elasticity improved; 200-mesh TMA binders were desirable.
Conclusions:
- Waste toner modification offers significant benefits for the asphalt industry.
- Waste toner integration enhances asphalt binder performance and addresses waste management.
- Further research into optimal waste toner particle sizes and content is warranted.
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