Effect of Fumed Silica Nanoparticles on Ultraviolet Aging Resistance of Bitumen

被引:41
作者
Cheraghian, Goshtasp [1 ]
Wistuba, Michael P. [1 ]
机构
[1] Tech Univ Carolo Wilhelmina Braunschweig, Braunschweig Pavement Engn Ctr, D-38106 Braunschweig, Germany
关键词
modified asphalt binder; fumed silica; bitumen aging; nanoparticles;
D O I
10.3390/nano11020454
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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.
引用
收藏
页码:1 / 18
页数:17
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