RT Journal Article
T1 Ageing Effects on a Softened Bitumen by the Addition of DSA (Dodecenyl Succinic Anhydride)
A1 Ortega Bravo, Francisco José
A1 Cuadri Vega, Antonio Abad
A1 Partal López, Pedro
A1 Navarro Domínguez, Francisco Javier
AB The softening of aged bitumen is necessary for a successful asphalt rejuvenation in roadrecycling operations. Thus, this study proposes a novel and successful approach by using DodecenylSuccinic Anhydride (DSA), a reactive surfactant with a polar head capable of reacting with somepolar compounds of bitumen. On this basis, this paper analyses the softening potential and ageinginhibition capability of the addition of 3 wt.% DSA before and after the application of standardlaboratory ageing methods (rolling thin film oven, RTFOT and pressure aging vessel (PAV) tests). Tothat end, different modified bitumens were evaluated by analysing the linear viscoelastic behaviour,viscous flow properties, thin layer chromatography, Fourier transform infrared spectroscopy (FTIR),contact angle measurements and compactibility tests. The results obtained for DSA show its greaterpotential to soften a model bitumen, when compared to a diluent oil, through physico-chemicalprocesses that bring about a lowering in the polarity along with the alteration of its colloidal stability.Even though ageing processes in bitumen negatively affect its softening capacity, the developed structuresstill retain the ability to partially compensate for the adverse hardening effects. Furthermore,DSA addition greatly enhances the binder’s wettability on a siliceous-type aggregate and favoursasphalt compaction
PB MDPI
SN 2073-4360 (electrónico)
YR 2022
FD 2022-06
LK http://hdl.handle.net/10272/21076
UL http://hdl.handle.net/10272/21076
LA eng
NO Ortega, F. J., Cuadri, A. A., Partal, P., & Navarro, F. J. (2022). Ageing Effects on a Softened Bitumen by the Addition of DSA (Dodecenyl Succinic Anhydride). In Polymers (Vol. 14, Issue 12, p. 2437). MDPI AG. https://doi.org/10.3390/polym14122437
NO This research was founded by the “Junta de Andalucía” through the projects UHU-1256916-PO FEDER 2014–2020, and GREENASPHALT-802C1800001
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026