Asphalt Binder “Skincare”? Aging Evaluation of an Asphalt Binder Modified by Nano-TiO2

Nanomaterials

Vasco Teixeira¹  Joaquim Carneiro¹  Cátia Afonso¹  Jorge Soares²  Sandra Soares²  Verônica Castelo Branco²  Amanda Alcantara²  Iran Rocha Segundo³  Elisabete Freitas³  Orlando Lima³  Natália C. Homem⁴  Salmon Landi⁵ 

[1] Centre of Physics of Minho and Porto Universities (CF-UM-UP), Azurém Campus, University of Minho, 4800-058 Guimarães, Portugal;Departamento de Engenharia de Transportes, Universidade Federal do Ceará, Fortaleza 60455-760, Brazil;Department of Civil Engineering, Institute for Sustainability and Innovation in Structural Engineering (ISISE), University of Minho, 4800-058 Guimarães, Portugal;Digital Transformation CoLab (DTx), Building 1, Campus of Azurém, University of Minho, 4800-058 Guimarães, Portugal;Federal Institute Goiano, Rio Verde 75901-970, Brazil;

关键词: anti-aging;    asphalt binders;    nano-TiO₂;    nanomodification;    semiconductor nanoparticles;    FTIR;   

DOI  :  10.3390/nano12101678

来源: DOAJ

【 摘 要 】

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 (TiO₂) has been applied in engineering investigations to promote anti-aging and photocatalytic properties. In this study, a commercial binder was modified with nano-TiO₂ (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-TiO₂ mitigates binder aging, pointing out 0.25% as an optimum modification content for the investigated asphalt binder.

【 授权许可】

Unknown