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Asphalt Binder “Skincare”? Aging Evaluation of an Asphalt Binder Modified by Nano-TiO(2)

Aging by oxidation of asphalt roadway material promotes changes in its physical, chemical, and rheological properties, affecting its hardening and accelerating the degradation of its corresponding asphalt mixture. Titanium dioxide (TiO(2)) has been applied in engineering investigations to promote an...

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Detalles Bibliográficos
Autores principales: Lima, Orlando, Afonso, Cátia, Rocha Segundo, Iran, Landi, Salmon, Homem, Natália C., Freitas, Elisabete, Alcantara, Amanda, Branco, Verônica Castelo, Soares, Sandra, Soares, Jorge, Teixeira, Vasco, Carneiro, Joaquim
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9145936/
https://www.ncbi.nlm.nih.gov/pubmed/35630901
http://dx.doi.org/10.3390/nano12101678
Descripción
Sumario:Aging by oxidation of asphalt roadway material promotes changes in its physical, chemical, and rheological properties, affecting its hardening and accelerating the degradation of its corresponding asphalt mixture. Titanium dioxide (TiO(2)) has been applied in engineering investigations to promote anti-aging and photocatalytic properties. In this study, a commercial binder was modified with nano-TiO(2) (using contents of 0.1, 0.25, 0.5, 1, 2, 3, and 6%). It was evaluated by physicochemical and rheological tests (penetration, softening point, mass loss, dynamic viscosity, rheology, and Fourier transform infrared spectroscopy—FTIR) before and after aging by rolling thin-film oven test (RTFOT) and pressure aging vessel (PAV). The results indicated that incorporating nano-TiO(2) mitigates binder aging, pointing out 0.25% as an optimum modification content for the investigated asphalt binder.