Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
207536 | Fuel | 2008 | 6 Pages |
Abstract
In this research we present the results of thermo-oxidation process of Colombian asphalt in a rheo-reactor. The viscosity and the particle size distribution of asphaltenes aggregates increased with the temperature of the thermo-oxidation process, demonstrating changes of the microstructure of the asphalt. The evolution of the elastic and viscous modules for aging asphalt in the rheo-reactor in the range of frequency examinated, they showed a relation of the type: G″(ω) ∼ G′(ω) ∼ ωn. This behavior with G″ > G′ (’weak gel’ structure) is related to a greater connectivity of molecules and confirms the changes generated by aging process.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
X.A. Vargas, N. Afanasjeva, M. Álvarez, P.H. Marchal, L. Choplin,