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Abstract:

Aging in bituminous binders is a process induced by chemical and physical changes during the production of the pavement and throughout its service life, manifesting itself into progressive embrittlement and pavement deterioration. The aging process can be monitored by using dynamic shear rheometers, whose response is related to the viscoelastic properties of the bituminous binder sample analyzed. The rheological properties of a bituminous binder were characterized in terms of the complex shear modulus G*at low frequencies and at 5 kHz, for the temperature range 20 -10 °C. The measurement technique is complemented by analytical and numerical methods used to extract the material parameters.