[Zurück]

B. Hofko, M. Hospodka, J. Füssl, L. Eberhardsteiner, H. Grothe, F. Handle, D. Großegger, R. Blab:
"Method And Device For Determining A Material Property Of A Bitumen Material";
Patent: International, Nr. Wo 2016/205847 A1; eingereicht: 29.12.2016.

The invention relates to a method and to a device (l) for detennining a material property, in particular the aging state
or the aging resistance, of a bitumen material (2), comprising the steps: applying a substantially monochromatic first excitation
radiation (4) of a first excitation wavelength (A.l) to the bitumen material (2); measuring the intensity (II) of a first fluorescence
radiation, excited by the first excitation radiation ( 4 ), at a measurement wavelength; applying a substantially monochromatic second
excitation radiation (6) of a first excitation wavelength (A.2) to the bitumen material (2); measuring the intensity (12) of a second
fluorescence radiation, excited by the second excitation radiation (6), at the measurement wavelength; determining a first key figure
(Kl) for the material property of the bitumen material (2) from the ratio between the intensity (12) of the second fluorescence
radiation to the intensity (II) of the first fluorescence radiation.

http://publik.tuwien.ac.at/files/publik_256058.pdf