Cheraghian Goshtasp, Wistuba Michael P
Braunschweig Pavement Engineering Centre, Technische Universität Braunschweig, 38106 Braunschweig, Germany.
Nanomaterials (Basel). 2021 Feb 11;11(2):454. doi: 10.3390/nano11020454.
In this study, bitumen modified by fumed silica nanoparticles was characterized through dynamic shear rheometer tests, scanning electron microscopy, and Fourier transform infrared spectroscopy. The fumed silica nanoparticles were used in three different ratios, i.e., 0.1, 0.2 and 0.3 wt.-% of bitumen. Specifically, the modified bitumen characteristics were studied after laboratory aging by analyzing the chemical composition and rheological properties. From the determination of oxidation degree and carbonyl index it was found that the resistance of the modified bitumen to ultraviolet aging was improved with the increasing nanoparticle content. In bitumen modified by fumed silica nanoparticles, the nanoparticles were well dispersed. Moreover, the results illustrated that the bitumen properties were improved, and the improvement effect of 0.1 wt.-% fumed silica nanoparticles was more distinct than the higher concentrations.
在本研究中，通过动态剪切流变仪测试、扫描电子显微镜和傅里叶变换红外光谱对气相二氧化硅纳米颗粒改性的沥青进行了表征。气相二氧化硅纳米颗粒以三种不同比例使用，即占沥青重量的0.1%、0.2%和0.3%。具体而言，通过分析化学组成和流变性能，研究了实验室老化后的改性沥青特性。通过氧化程度和羰基指数的测定发现，随着纳米颗粒含量的增加，改性沥青对紫外线老化的抗性得到提高。在气相二氧化硅纳米颗粒改性的沥青中，纳米颗粒分散良好。此外，结果表明沥青性能得到改善，0.1%重量比的气相二氧化硅纳米颗粒的改善效果比更高浓度的更明显。
