Evolution of the dynamic stiffness of typical materials used under floating floor during their lifetime

摘要

The creep of materials used under floating floor corresponds to a time-dependent deformation process which leads to a modification of the mechanical characteristics of the product, mainly in terms of a progressive stiffening. Information about the evolution of the material's stiffness under long term exposure to structural loads is an important parameter when assessing the acoustical performances of the material in time. This article presents a setup which allows to measure the dynamic stiffness under a long term stress and discusses the measurement results for typical materials used under floating floor.