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Effect of Aging on the Rheological Properties of Blends of Virgin and Rejuvenated RA Binders

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2020
Authors
Wang, Di
Cannone Falchetto, Augusto
Hugener, Martin
Porot, Laurent
Kawakami, Atsushi
Hofko, Bernhard
Grilli, Andrea
Pasquini, Emiliano
Passeto, Marco
Tabatabaee, Hassan
Zhai, Huachun
Sá da Costa, Margarida
Soenen, Hilde
Kara De Maeijer, Patricia
Van den bergh, Wim
Cardone, Fabrizio
Carter, Alan
Vasconcelos, Kamilla
Carbonneau, Xavier
Lorserie, Aurelie
Mladenović, Goran
Orešković, Marko
Koudelka, Tomas
Bocci, Edoardo
Zhang, Runhua
Dave, Eshan
Tebaldi, Gabriele
Conference object (Published version)
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Abstract
The use of rejuvenators has seen a consistent increase over the years in the asphalt pavement industry. This is due to the need for maximizing the demand for incorporating a higher amount of Reclaimed Asphalt (RA) in the pavement asphalt mixtures. In order to tackle this challenge, the Task Group 3, focusing on asphalt binders and additives, of the RILEM TC RAP conducted an interlaboratory activity to evaluate the effect of aging on blends of virgin and rejuvenated RA binders. A set of conventional tests including penetration value at 25 °C, softening point temperature and rheological measurements by means of Dynamic Shear Rheometer (DSR) were selected to involve a large number of participants. A binder, recovered from field RA, was treated with a bio-based rejuvenator and blended with a virgin binder to simulate recycling at three different percentages 60 %, 80 %, and 100 %. These blends, as well as the pure v...irgin binder, were next short and long term aged and tested to evaluate the changes in the corresponding properties. Relatively consistent results were obtained for the entire set of blends. The aging of combined rejuvenated RA and virgin binders was comparable to that experienced for the pure virgin binder. DSR data provided a more precise evolution of the impact of aging on the materials.

Keywords:
Asphalt Binder / Reclaimed Asphalt (RA) / Rejuvenator / DSR
Source:
RILEM International Symposium on Bituminous Materials, 2020
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URI
https://grafar.grf.bg.ac.rs/handle/123456789/2207
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