Related Experiment Video
Updated: Jul 5, 2025
09:39
Physical, Chemical and Biological Characterization of Six Biochars Produced for the Remediation of Contaminated Sites
Published on: November 28, 2014
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The efficiency of bio-char as bitumen modifier.
Valeria Loise1, Pietro Calandra2, Alfonso Policicchio3,4,5
1University of Calabria, Department of Chemistry and Chemical Technologies, Via P. Bucci Cubo 14D, 87036, Rende, CS, Italy.
Heliyon
|January 11, 2024
Summary
High porosity char can enhance bitumen mechanical properties for road pavements. However, neither char additive demonstrated rejuvenation effects or caused segregation issues in the tested bitumens.
Area of Science:
- Materials Science
- Civil Engineering
- Chemical Engineering
Background:
- Improving bitumen's mechanical properties is crucial for durable road pavements.
- Novel bitumen modifiers are continuously investigated to enhance performance.
- Bitumen characteristics vary, necessitating tailored additive selection.
Purpose of the Study:
- To evaluate the impact of two distinct char additives on 50/70 bitumen.
- To characterize the additives and their effects on bitumen's physical and mechanical properties.
- To assess potential mechanical enhancement and rejuvenation effects of char additives.
Main Methods:
- Comprehensive characterization of char additives (morphological, surface, bulk).
- Rheological analysis to assess bitumen's viscoelastic behavior.
- Nuclear Magnetic Resonance (NMR) relaxometry and Atomic Force Microscopy (AFM) for detailed property analysis.
Main Results:
- One char sample, exhibiting high porosity, showed potential as a mechanical property modifier for bitumen.
- No significant bitumen rejuvenation effects were observed with either char additive.
- Both additives were found to be compatible with bitumen, showing no segregation phenomena.
Conclusions:
- Char with high porosity is a viable candidate for modifying bitumen mechanical properties in pavement applications.
- The tested chars do not provide rejuvenation benefits for aged bitumen.
- The studied chars are compatible with 50/70 bitumen, preventing phase separation.
