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
Department of Civil Engineering, Institute for Sustainability and Innovation in Structural Engineering (ISISE), University of Minho, 4800-058 Guimarães, Portugal.
Centre of Physics of Minho and Porto Universities (CF-UM-UP), Azurém Campus, University of Minho, 4800-058 Guimarães, Portugal.
Nanomaterials (Basel). 2022 May 14;12(10):1678. doi: 10.3390/nano12101678.
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) has been applied in engineering investigations to promote anti-aging and photocatalytic properties. In this study, a commercial binder was modified with nano-TiO (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 mitigates binder aging, pointing out 0.25% as an optimum modification content for the investigated asphalt binder.
沥青路面材料的氧化老化会促使其物理、化学和流变性能发生变化，影响其硬化并加速相应沥青混合料的降解。二氧化钛（TiO₂）已应用于工程研究中，以提升抗老化和光催化性能。在本研究中，使用纳米TiO₂（含量分别为0.1%、0.25%、0.5%、1%、2%、3%和6%）对一种商用粘结剂进行改性。通过滚薄膜烘箱试验（RTFOT）和压力老化容器（PAV）进行老化前后的物理化学和流变测试（针入度、软化点、质量损失、动态粘度、流变学和傅里叶变换红外光谱-FTIR）对其进行评估。结果表明，掺入纳米TiO₂可减轻粘结剂老化，指出0.25%为所研究沥青粘结剂的最佳改性含量。
