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Evaluation of Anti-Aging Effect in Biochar-Modified Bitumen

Author

Listed:
  • Clara Celauro

    (Dipartimento di Ingegneria, Università Degli Studi di Palermo, Viale delle Scienze, 90128 Palermo, Italy)

  • Rosalia Teresi

    (Dipartimento di Ingegneria, Università Degli Studi di Palermo, Viale delle Scienze, 90128 Palermo, Italy)

  • Nadka Tz. Dintcheva

    (Dipartimento di Ingegneria, Università Degli Studi di Palermo, Viale delle Scienze, 90128 Palermo, Italy)

Abstract

Increasing environmental awareness has led to a great research effort towards the formulation of increasingly sustainable pavements, mainly by developing bituminous mixtures incorporating waste materials. Furthermore, some waste materials have been proved to be useful for enhancing the performance of road bitumen and bituminous products, so their use is a potential solution for ensuring environmental, economic, and also technical benefits. Amongst the different wastes to be used for bitumen modification, a possible one is that obtained via the pyrolysis of biomass, named biochar. In the research reported here, a selected biochar was added to bitumen to verify the possibility of improving bitumen performance in terms of photo-oxidation resistance, which is a major problem in urban areas where black flexible pavements contribute to the urban heat island effect. Different biochar amounts were selected, and two different aging methods were performed: short-term aging and UVB aging resistance; they were monitored using rheological and spectroscopic analysis. The structural changes in bitumen in terms of carbonyl and hydroxyl accumulation were observed at various UV irradiation times. All the experimental data indicate that the use of biochar can have a positive effect on the UV resistance of bitumen, lowering its photo-oxidation tendency. This may lead to reductions in use of natural, non-renewable materials, since intervention maintenance may be scheduled at longer terms.

Suggested Citation

  • Clara Celauro & Rosalia Teresi & Nadka Tz. Dintcheva, 2023. "Evaluation of Anti-Aging Effect in Biochar-Modified Bitumen," Sustainability, MDPI, vol. 15(13), pages 1-16, July.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:13:p:10583-:d:1187402
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    References listed on IDEAS

    as
    1. Hugo Alexander Rondón-Quintana & Fredy Alberto Reyes-Lizcano & Saieth Baudilio Chaves-Pabón & Juan Gabriel Bastidas-Martínez & Carlos Alfonso Zafra-Mejía, 2022. "Use of Biochar in Asphalts: Review," Sustainability, MDPI, vol. 14(8), pages 1-12, April.
    2. Rhoda Afriyie Mensah & Vigneshwaran Shanmugam & Sreenivasan Narayanan & Nima Razavi & Adrian Ulfberg & Thomas Blanksvärd & Faez Sayahi & Peter Simonsson & Benjamin Reinke & Michael Försth & Gabriel Sa, 2021. "Biochar-Added Cementitious Materials—A Review on Mechanical, Thermal, and Environmental Properties," Sustainability, MDPI, vol. 13(16), pages 1-27, August.
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