Print Email Facebook Twitter Do chemistry and rheology follow the same laboratory ageing trends in bitumen? Title Do chemistry and rheology follow the same laboratory ageing trends in bitumen? Author Pipintakos, Georgios (Universiteit Antwerpen) Lommaert, Caitlin (Universiteit Antwerpen) Varveri, Aikaterini (TU Delft Pavement Engineering) Van den bergh, Wim (Universiteit Antwerpen) Date 2022 Abstract The ageing of bitumen has received great attention both from a chemical and rheological perspective due to its direct impact on asphalt performance. However, open questions with respect to the convergence of the synchronous ageing changes in rheology and chemistry of bitumen still exist. This paper addresses these alterations of chemistry and rheology and attempts to establish a link via fitting rheological equations fed by fundamental chemical information. To that end, three binders of different type were used in four different laboratory ageing states. A number of spectroscopic techniques and rheological testing were employed to derive corresponding chemical and rheological parameters. In parallel, various statistical methods (Bivariate analysis, Wilcoxon test, Factor analysis) assisted in identifying relationships among the chemo-rheological parameters and simplifying the number of variables. The results of this study demonstrate that chemistry and rheology are following similar changes when considering laboratory ageing following the fast-rate phase of a dual oxidation scheme and short-term lab ageing. Finally, this work manages to establish a linking framework for a number of newly-introduced rheological parameters. All in all, the results of this study might be particularly interesting for future interventions in the chemical composition of bitumen, considering its effect on performance. Subject H-NMRAgeingBitumenDSREPRFactor analysisFTIRRegressionTOF–SIMS To reference this document use: http://resolver.tudelft.nl/uuid:c14cc4fe-0aba-464a-80e1-a4618fd30e7b DOI https://doi.org/10.1617/s11527-022-01986-w ISSN 1359-5997 Source Materials and Structures, 55 (5) Bibliographical note The article was originally published in volume 55, issue 5, ID 146 without open access. With the society's decision to grant Open Choice the copyright of the article changed in February 2023 to © The Author(s) 2022 and the article is forthwith distributed under a Creative Commons Attribution 4.0 Correction DOI 10.1617/s11527-023-02123-x published on 23 February 2023 Part of collection Institutional Repository Document type journal article Rights © 2022 Georgios Pipintakos, Caitlin Lommaert, Aikaterini Varveri, Wim Van den bergh Files PDF s11527_022_01986_w.pdf 1.09 MB Close viewer /islandora/object/uuid:c14cc4fe-0aba-464a-80e1-a4618fd30e7b/datastream/OBJ/view