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EnglishThis paper presents the results of a preliminary study on the use of a novel ap-proach for the evaluation of the effectiveness of rejuvenating agents used in as-phalt mixtures containing reclaimed asphalt (RA). Such an approach is based on the mechanical testing of model systems constituted by a single-sized RA materi-al, in its original state and after pretreatment with rejuvenators, compacted to a target volumetric condition. Model systems were prepared by making use of two rejuvenators and by also considering a reference combination of virgin binder and aggregates extracted from the RA. Tests were carried out for the evaluation of stiffness modulus and indirect tensile strength as a function of curing time. Ex-perimental results showed that the proposed approach can capture the changes occurring in the aged RA binder as a consequence of the effects induced by reju-venators. Quantification of the rejuvenating effects was carried out by analyzing recorded stiffness and strength variations, and by referring to a ductility tough-ness index, introduced to better describe stress-strain response after failure.
Testing of reclaimed asphalt model systems for the evaluation of the effectiveness of rejuvenators / Dalmazzo, D.; Urbano, L.; Riviera, P. P.; Santagata, E.. - ELETTRONICO. - (2022), pp. 1751-1757. [10.1007/978-3-030-46455-4_222]
| Titolo: | Testing of reclaimed asphalt model systems for the evaluation of the effectiveness of rejuvenators | |
| Autori: | ||
| Data di pubblicazione: | 2022 | |
| Titolo del libro: | ISBM 2020: Proceedings of the RILEM International Symposium on Bituminous Materials | |
| Serie: | ||
| Abstract: | This paper presents the results of a preliminary study on the use of a novel ap-proach for the ev...aluation of the effectiveness of rejuvenating agents used in as-phalt mixtures containing reclaimed asphalt (RA). Such an approach is based on the mechanical testing of model systems constituted by a single-sized RA materi-al, in its original state and after pretreatment with rejuvenators, compacted to a target volumetric condition. Model systems were prepared by making use of two rejuvenators and by also considering a reference combination of virgin binder and aggregates extracted from the RA. Tests were carried out for the evaluation of stiffness modulus and indirect tensile strength as a function of curing time. Ex-perimental results showed that the proposed approach can capture the changes occurring in the aged RA binder as a consequence of the effects induced by reju-venators. Quantification of the rejuvenating effects was carried out by analyzing recorded stiffness and strength variations, and by referring to a ductility tough-ness index, introduced to better describe stress-strain response after failure. | |
| ISBN: | 978-3-030-46454-7 978-3-030-46455-4 | |
| Appare nelle tipologie: | 2.1 Contributo in volume (Capitolo o Saggio) |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| Dalmazzo_et_al_Lyon_2020_FINAL.pdf | Versione post peer-review | 2. Post-print / Author's Accepted Manuscript | PUBBLICO - Tutti i diritti riservati | Embargo: 26/09/2022 Richiedi una copia |
| Published_Manuscript_Editorial_Version_ISBM_2020.pdf | Versione editoriale | 2a Post-print versione editoriale / Version of Record | Non Pubblico - Accesso privato/ristretto | Administrator Richiedi una copia |
http://hdl.handle.net/11583/2858160
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