Effect of Fumed Silica Nanoparticles on Ultraviolet Aging Resistance of Bitumen

Nanomaterials

Michael P. Wistuba¹  Goshtasp Cheraghian¹ 

[1] Braunschweig Pavement Engineering Centre, Technische Universität Braunschweig, 38106 Braunschweig, Germany;

关键词: modified asphalt binder;    fumed silica;    bitumen aging;    nanoparticles;   

DOI  :  10.3390/nano11020454

来源: DOAJ

【 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.

【 授权许可】

Unknown