Temperature effect of asphalt production on the thermo-chemical properties of Kraft lignin

Global warming has triggered a series of strategies and efforts to reduce greenhouse gas emissions and increase the reuse and recycling into asphalt pavements. One of these, is the reduction of production temperatures of asphalt mixtures, and the other is using sustainable antioxidants, such as Kraf...

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Bibliographic Details
Published in:The international journal of pavement engineering 2024-12, Vol.25 (1)
Main Authors: Marquez, J. Waldo, Fuentes, Valentina, Rueda, Eduardo J., Tundidor-Camba, Alain, Escalona, Néstor, Norambuena-Contreras, José, González, Alvaro
Format: Article
Language:English
Subjects:
Antioxidants
Asphalt mixes
asphalt mixture
Asphalt pavements
bitumen
Bitumens
Chemical properties
DPPH
Emissions
FTIR analysis
Greenhouse effect
Greenhouse gases
High temperature
Kraft lignin
Lignin
Polymer blends
Rheological properties
Service life
Temperature effects
thermogravimetric analysis
Thermogravimetry
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Summary:Global warming has triggered a series of strategies and efforts to reduce greenhouse gas emissions and increase the reuse and recycling into asphalt pavements. One of these, is the reduction of production temperatures of asphalt mixtures, and the other is using sustainable antioxidants, such as Kraft lignin, with high phenolic content. Kraft lignin is usually mixed at high temperatures without considering the effect of temperature on its antioxidant properties. This research aimed to study the impact of the production temperatures of asphalt mixtures on the thermo-chemical properties of Kraft lignin and its antioxidant capacity. To evaluate these properties, thermogravimetry, infrared spectroscopy, and DPPH tests were done. To validate the results, bitumen-lignin blends were prepared considering representative temperatures for Hot-Mix-Asphalt (HMA), 160°C, and for Warm-Mix-Asphalt (WMA), 135°C. Bitumen-lignin blends were prepared considering 0% and 20% Kraft lignin by total weight bitumen. The blended samples, unaged and aged. were evaluated considering mechanical, rheological, and chemical properties. The main conclusion of the study demonstrated that although Kraft lignin can be used in HMA, using it in mixtures with lower temperatures conserve its properties. WMA production temperatures preserve Kraft lignin's chemical properties, increasing the durability and resilience of bitumen throughout its service life.
ISSN:1029-8436
1477-268X
DOI:10.1080/10298436.2024.2400563