One-dimensional rheological models of asphalt-aggregate mixtures

Asphalt-aggregate mixtures constitute the basic component for road pavement construction. The fundamental problem in the pavement design procedure is to develop an appropriate constitutive model suited for structural behavior modeling within a wide range of mechanical and environmental loadings. This paper deals with the analysis of one-dimensional rheological models of asphalt-aggregate mixtures. We have begun with the classical viscoelastic Burgers scheme along with its alternative variants. Then, the proposal of an original rheological model including plasticity was given. The differential constitutive relationships of such a model are presented in the paper. The results of computer simulations are also visualized.ONE-DIMENSIONAL RHEOLOGICAL MODELS OF ASPHALT-AGGREGATE MIXTURES
Asphalt-aggregate mixtures constitute the basic material used for the construction of road pavement structural layers.
Proper design of pavement structures requires the development of a material model that reflects its behavior under a wide range of mechanical and environmental loads. This paper examines one-dimensional rheological structures used for modeling the constitutive properties of bituminous layer materials. Initially, the classical viscoelastic Burgers model and its alternative variants are recalled, followed by the presentation of an original rheological structure allowing for the modeling of permanent deformations of a viscous and plastic nature. Based on this, appropriate differential relationships were formulated. The paper is illustrated with the results of computer calculations. (…)

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