Modeling the linear viscoelastic behavior of asphaltite-modified bitumens

International audienceA modeling approach which allows predicting the linear viscoelastic behavior of bitumen blends from the linear viscoelastic properties of individual constituents is presented in this paper. This approach consists in a combination of the Tsenoglou rule for miscible viscoelastic materials with the Palierne model for viscoelastic emulsions. Based on some simple assumptions, this combination predicts satisfactorily the rheological behavior of asphaltite-modified bitumens and, consequently, it can be used for dosage purposes. Beyond asphaltite-modified bitumens, the modeling approach developed here can be applied on reclaimed asphalt-modified bitumens, polymer-modified bitumens, and on blends of partially miscible polymers presenting a suspended droplet morphology