Physicochemical and Rheological Properties of a Transparent Asphalt Binder Modified with Nano-TiO2

Nanomaterials

Joaquim Carneiro¹  Elisabete Freitas²  IranRocha Segundo²  Johan Blom³  Georgios Pipintakos³  Alexandros Margaritis³  Cedric Vuye³  Salmon Landi⁴  Siegfried Denys⁵  Tom Tytgat⁵ 

[1] Centre of Physics, University of Minho, 4800-058 Guimarães, Portugal;Department of Civil Engineering, University of Minho, 4800-058 Guimarães, Portugal;Energy and Materials in Infrastructure and Buildings (EMIB) Research Group, University of Antwerp, 2020 Antwerp, Belgium;Federal Institute Goiano, Rio Verde 75901-970, Brazil;Research Group Sustainable Energy, Air and Water Technology, University of Antwerp, 2020 Antwerp, Belgium;

关键词: asphalt binder;    transparent binder;    nanomaterials;    TiO₂;    viscoelastic properties;    FTIR;   

DOI  :  10.3390/nano10112152

来源: DOAJ

【 摘 要 】

Transparent binder is used to substitute conventional black asphalt binder and to provide light-colored pavements, whereas nano-TiO₂ has the potential to promote photocatalytic and self-cleaning properties. Together, these materials provide multifunction effects and benefits when the pavement is submitted to high solar irradiation. This paper analyzes the physicochemical and rheological properties of a transparent binder modified with 0.5%, 3.0%, 6.0%, and 10.0% nano-TiO₂ and compares it to the transparent base binder and conventional and polymer modified binders (PMB) without nano-TiO₂. Their penetration, softening point, dynamic viscosity, master curve, black diagram, Linear Amplitude Sweep (LAS), Multiple Stress Creep Recovery (MSCR), and Fourier Transform Infrared Spectroscopy (FTIR) were obtained. The transparent binders (base and modified) seem to be workable considering their viscosity, and exhibited values between the conventional binder and PMB with respect to rutting resistance, penetration, and softening point. They showed similar behavior to the PMB, demonstrating signs of polymer modification. The addition of TiO₂ seemed to reduce fatigue life, except for the 0.5% content. Nevertheless, its addition in high contents increased the rutting resistance. The TiO₂ modification seems to have little effect on the chemical functional indices. The best percentage of TiO₂ was 0.5%, with respect to fatigue, and 10.0% with respect to permanent deformation.

【 授权许可】

Unknown