Filler and binder influence on the linear viscoelastic behavior of mastics

An investigation of the linear viscoelastic properties of bituminous mastics observed at low strain level is proposed. The complex shear modulus G* of materials is measured by means of a new annular shear rheometer (ASR) developed at the DGCB (Departement Genie Civil et Batiment) laboratory of ENTPE (Ecole Nationale des Travaux Publics de l'Etat). The aim is to determine the effect of different fillers and different binders on the complex modulus of mastics. The considered parameters of fillers are the particles size and the spread of the grading curve. A study of ageing influence of the binder on the complex modulus of the corresponding mastics is also proposed. Complex reinforcement and ageing coefficients are introduced to analyze the results. They allow quantifying ageing effect and reinforcement of mastics against the corresponding binder.