Abstract
This chapter gives some insight on recent research focused on the linear viscoelastic (LVE) behavior of bituminous materials. The development of new experimental devices and methods, including evaluation of Poisson’s ratio and wave propagation tests, are described. Three-dimensional (3D) LVE behavior has been investigated, and some results of complex Poisson’s ratio are presented. The time–temperature superposition principle is extended to the 3D case. Results concerning anisotropy are also shown. With a better knowledge of LVE behavior, more adapted analytical models can be developed to fit experimental measurements. The 3D version of the two springs, two parabolic elements, one dashpot (2S2P1D) model is presented, and its capability to capture the behavior of different bituminous materials is highlighted. A method to determine the 3D LVE behavior of mixtures from the LVE behavior of binders, based on a mechanistic approach, is also explained. In the end, this chapter aims to show that bituminous materials can be more precisely characterized.
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