Devulcanized Crumb Rubber as Bitumen Modifier

Authors

  • Gabriel VASILIEVICI National Institute for Research Development for Chemistry and Petrochemistry-ICECHIM Bucharest, 202 Spl. Independenței, 060021, Bucharest, Romania. *Corresponding author: gvasilievici@icechim.ro https://orcid.org/0000-0002-0217-929X
  • Andreea-Luiza MIRT National Institute for Research Development for Chemistry and Petrochemistry-ICECHIM Bucharest, 202 Spl. Independenței, 060021, Bucharest, Romania. https://orcid.org/0000-0003-0559-1842
  • Simona GHIMIS National Institute for Research Development for Chemistry and Petrochemistry-ICECHIM Bucharest, 202 Spl. Independenței, 060021, Bucharest, Romania https://orcid.org/0000-0002-5166-9535
  • Emilian ZAHARIA ATICA Chemicals SRL, 202 Căzănești str., Râmnicu Vâlcea, 240414, Vâlcea, Romania
  • Mihaela BOMBOS ATICA Chemicals SRL, 202 Căzănești str., Râmnicu Vâlcea, 240414, Vâlcea, Romania
  • Dorin BOMBOS ATICA Chemicals SRL, 202 Căzănești str., Râmnicu Vâlcea, 240414, Vâlcea, Romania; Faculty of Petroleum Refining and Petrochemistry, Petroleum-Gas University, Bucharest Boulevard no. 39, Ploiesti, Prahova, RO 100680 https://orcid.org/0009-0001-0515-9032

DOI:

https://doi.org/10.24193/subbchem.2024.2.03

Keywords:

crumb rubber, desulfurization, molybdenum catalysts

Abstract

The dispersion of crumb rubber in road bitumen is essential for enhancing the elasticity of asphalt coatings. However, elastomer cross-linking through vulcanization can reduce the colloidal stability of bitumen. This study aims to enhance compatibility by partially devulcanizing crumb rubber using a pulverulent catalyst, specifically phosphomolybdic acid, in a batch reactor at 270°C. The use of a molybdenum-based catalyst is preferred due to its effectiveness in catalyzing the devulcanization process. Additionally, further conditioning of the catalyst through grinding optimizes contact with crumb rubber, enhancing catalyst activity and improving overall compatibility with road bitumen.

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STUDIA UBB CHEMIA, Volume 69 (LXIX), No. 2, June 2024

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Published

2024-06-30

How to Cite

VASILIEVICI, G., MIRT, A.-L., GHIMIS, S., ZAHARIA, E., BOMBOS, M., & BOMBOS, D. (2024). Devulcanized Crumb Rubber as Bitumen Modifier. Studia Universitatis Babeș-Bolyai Chemia, 69(2), 37–47. https://doi.org/10.24193/subbchem.2024.2.03

Issue

Volume 69, No. 2, 2024

Section

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