Dynamic Behavior of Vibratory System to Discrete Variation of Viscous Damping in Linear Viscoelastic Material Processing Technologies

The experimental research carried out under forced vibrations, by applying a harmonic excitation inertial force, highlighted the fact that the processed viscoelastic materials, when put into operation (fresh concrete, soil, asphalt mixes, filling mastics, mortar with additives, bitumens), can be characterized by a relevant dynamic response that corresponds to a certain type of rheological model. It was found that the product family behaves differently, from a rheological point of view, depending on the weight of the physico-chemical composition components. Thus, the schematization of the calculation model must correspond to the dynamic characteristic, in response to the monotonous variation of the excitation pulse, by ensuring a continuous variation both numerically and experimentally.