Abstract: The invention relates to a method and to a device for determining a material property, in particular the aging state or the aging resistance, of a bitumen material, comprising the steps: applying a substantially monochromatic first excitation radiation of a first excitation wavelength to the bitumen material; measuring the intensity of a first fluorescence radiation, excited by the first excitation radiation, at a measurement wavelength; applying a substantially monochromatic second excitation radiation of a first excitation wavelength to the bitumen material; measuring the intensity of a second fluorescence radiation, excited by the second excitation radiation, at the measurement wavelength; determining a first key figure for the material property of the bitumen material from the ratio between the intensity of the second fluorescence radiation to the intensity of the first fluorescence radiation.

Abstract: The invention relates to a method and to a device for determining a material property, in particular the aging state or the aging resistance, of a bitumen material, comprising the steps: applying a substantially monochromatic first excitation radiation of a first excitation wavelength to the bitumen material; measuring the intensity of a first fluorescence radiation, excited by the first excitation radiation, at a measurement wavelength; applying a substantially monochromatic second excitation radiation of a first excitation wavelength to the bitumen material; measuring the intensity of a second fluorescence radiation, excited by the second excitation radiation, at the measurement wavelength; determining a first key figure for the material property of the bitumen material from the ratio between the intensity of the second fluorescence radiation to the intensity of the first fluorescence radiation.

Abstract: The invention relates to a method for producing an aggregate for the production of building materials, wherein a starting material containing at least one fibre-containing waste fraction has had heavy materials removed and been comminuted in order to obtain a substantially free-flowing aggregate. Improved product properties can be achieved in such a way that the fibre content is set between 3% and 45%, preferably between 5% and 25%, and more preferably between 7% and 12%, and a mass fraction of between 2% and 25%, preferably between 2% and 10%, and more preferably between 3% and 8%, of a fine-grain inorganic additive is set. The invention further relates to an aggregate produced according to this method, and to asphalt or concrete.