The thermal impedance of a tow-plaster material is determined from the thermal electrical analogy in the dynamic frequency regime. The thermophysical characteristics magnitudes of the material, thermal conductivity and coefficient of thermal diffusivity are relating to shunt and series resistances determined from the results of the study of representations of Nyquist and Bode plots. The study applied to the composite tow-plaster showed it can be used as a good thermal insulator.

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The determination of the mechanical parameters for the sizing of a road allows, according to the traffic to choose the minimal thickness for various layers. These parameters vary according to the climatic measurement in strong thermal stress zone (illumination) or in of low thermal stress zone (shade) In this work, a theatrical study on the temperature variation and the flow density determination method for every interface of the road structure is proposed in frequency dynamic modulation. This method highlights the influence of the climatic parameters such as the thermal exchange coefficient by radiation and the thermal exchange coefficient by convection.

In this article, we propose to determine by thermal electric-analogy of the thermoelectric parameters of a road bearing layer structure from the thermal impedance spectroscopy method. When the road surface is submitted to thermal constraints, a heat exchange phenomenon appears to be characterized by the radiation thermal exchange coefficient and the convection thermal exchange coefficient. The influenceof one of these coefficients compared with the other one on the road depends on its environment (shade or illumination). The determination of the thermal electric parameters allow the valid bearing layer thermal stability. The method used is the thermal impedance spectroscopy method.