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Evaluating the ageing degrees of bitumen by rheological and chemical indices

Hu, Yongping; Xia, Wei; Xue, Yu; Zhao, Pinxue; Wen, Xuanye; Si, Wei; Wang, Haopeng; Zhou, Lu; Airey, Gordon Dan

Evaluating the ageing degrees of bitumen by rheological and chemical indices Thumbnail


Yongping Hu

Wei Xia

Yu Xue

Pinxue Zhao

Xuanye Wen

Wei Si

Haopeng Wang

Gordon Dan Airey


The ageing of bitumen is an inevitable phenomenon which is still challenging to be characterised. This paper aims at evaluating the ageing degrees of bitumen comprehensively. There were six types of bitumen being aged to five levels for comparing purposes and multiple rheological tests by a DSR as well as chemical test for the SARA (saturates, aromatics, resins and asphaltenes) properties of bitumen were carried out. The critical temperatures, G-R parameter and nonrecoverable-compliance-based ageing indices were proposed to evaluate the ageing degrees of bitumen in terms of low-, intermediate- and high-temperature performance of bitumen, respectively. Also, a novel ageing evaluation index based on the integration of modulus of master curves was employed and modified, which can evaluate the ageing degrees of bitumen accurately in terms of the whole range of temperature. Finally, the chemical ageing index were analysed and was confirmed to have strong linear relationship with rheological indices of bitumen.

Journal Article Type Article
Acceptance Date Feb 9, 2023
Online Publication Date Feb 22, 2023
Publication Date 2023
Deposit Date Feb 24, 2023
Publicly Available Date Mar 1, 2023
Journal Road Materials and Pavement Design
Print ISSN 1468-0629
Electronic ISSN 2164-7402
Publisher Informa UK Limited
Peer Reviewed Peer Reviewed
Volume 24
Issue sup1
Article Number 2180289
Pages 19-36
Keywords Bitumen; ageing; rheological properties; chemical properties; ageing index
Public URL
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