Volume 40, Issue 7 (December 2012)
Analysis of Colombian Bitumen Modified With a Nanocomposite
Nanotechnology is giving to materials science new opportunities to develop even further all engineering materials. This paper details the preparation of a nanocomposite aimed to be used as a bitumen modifier, the modification itself, and evaluation of some rheological properties of the modified asphalts intended to build long life asphalt pavements. The bitumen was modified with a polymer nanocomposite and its conventional material (without nanostructure) at three different compositions, while their rheological behavior was compared with the asphalt conditioned under the same temperature and stirring time than the modified binders. Evaluation of the binders was carried out to the samples as prepared and to their residues after Aging—Rolling Thin Film Oven Test. According to the experimental results, the Colombian bitumen modified with the new polymer nanocomposite could undergo much less mass loss under aging conditions than the bitumen modified with its standard material getting, at the same time, higher mechanical resistance, and less accumulated strain without being stress sensitive at high temperatures.