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Use of Hansen Solubility Parameters (HSP) in the selection of highly effective rejuvenators for aged bitumen

Hu, Yongping; Sreeram, Anand; Xia, Wei; Wang, Haopeng; Zhou, Lu; Si, Wei; Airey, Gordon D.

Use of Hansen Solubility Parameters (HSP) in the selection of highly effective rejuvenators for aged bitumen Thumbnail


Authors

Yongping Hu

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ANAND SREERAM Anand.Sreeram@nottingham.ac.uk
Assistant Professor in Transportation Engineering

Wei Xia

Haopeng Wang

Wei Si

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GORDON AIREY GORDON.AIREY@NOTTINGHAM.AC.UK
Professor of Pavement Engineering Materials



Abstract

While there is considerable research regarding the recycling and reuse of aged bitumen in terms of the evaluation of rheological properties, there is not much fundamental understanding regarding the underlying mechanisms of the rejuvenation process. Specifically, the rationale behind rejuvenator selection and the efficiency of rejuvenators is not well understood. This paper proposes an approach for rejuvenator selection based on Hansen Solubility Parameters (HSP). To fully validate its feasibility, rheological and chemical tests were also performed. The results revealed that highly efficient rejuvenators have similar HSP with bitumen and greater HSP radii. The overlapping ratio between the Hansen spheres of bitumen and rejuvenators could be considered as a reliable tool to screen rejuvenators. Linear correlations were found between the efficiency of rejuvenators and solubility spheres. The rheological and chemical tests using master curve analysis and saturates, aromatics, resins and asphaltenes (SARA) fractionation further supported using HSP as a basis for rejuvenator selection.

Citation

Hu, Y., Sreeram, A., Xia, W., Wang, H., Zhou, L., Si, W., & Airey, G. D. (2024). Use of Hansen Solubility Parameters (HSP) in the selection of highly effective rejuvenators for aged bitumen. Road Materials and Pavement Design, https://doi.org/10.1080/14680629.2024.2357684

Journal Article Type Article
Acceptance Date May 14, 2024
Online Publication Date May 30, 2024
Publication Date May 30, 2024
Deposit Date May 31, 2024
Publicly Available Date Jun 3, 2024
Journal Road Materials and Pavement Design
Print ISSN 1468-0629
Electronic ISSN 2164-7402
Publisher Taylor and Francis
Peer Reviewed Peer Reviewed
DOI https://doi.org/10.1080/14680629.2024.2357684
Keywords Bitumen; rejuvenation; Hansen Solubility Parameter; rheology; chemistry; compatibility
Publisher URL https://www.tandfonline.com/doi/full/10.1080/14680629.2024.2357684

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