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Vorträge und Posterpräsentationen (mit Tagungsband-Eintrag):

F. Handle, B. Hofko, J. Füssl, L. Eberhardsteiner, S. Neudl, M. Hospodka, D. Großegger, R. Blab, H. Grothe:
"Bitumen Microstructure And Bitumen Ageing";
Vortrag: 15th Austrian Chemistry Days (Chemietage), TU-Graz, Graz, Österreich; 23.09.2013 - 26.09.2013; in: "15. Österreichische Chemietage - Programm", (2013).



Kurzfassung englisch:
Bitumen is an important industrial product of mineral oil refining and is used mostly for the production of asphalt concrete, i.e. a mixture of bitumen and mineral aggregates. The total market volume of bitumen for the EU is around Euro2-3 billion peryear. High crude oil prizes, growing customer expectations, and regulations have uncovered the necessity to understand the microstructure and the ageing mechanisms in bitumen.The CLSM (confocal laser scanning microscopy) allows the detailed observation of the fluorescent centers in bitumen. The origin of the fluorescence in bitumen is subject of ongoing debate in the scientific community. This visualization
provides important clues on the microstructure and on asphaltene micelles. For polymer-modified bitumina CLSM can provide information about polymeric network formation and quality of dispersion. The interpretation of these microstructures is possible by additional fluorescent spectroscopy of different bitumen phases obtained by
chromatographic separation. This investigation has led to an improved understanding of the micelle structure and a new model of bitumen ageing mechanisms. In particular new evidence was found to support the model of a micelle mantle consisting of aromatics and heteroaromatics surrounding and stabilizing the agglomerated asphaltenes.

Schlagworte:
Bitumen, Asphalt, Alterung, Materialien, Straßenbau, Recycling


Elektronische Version der Publikation:
http://publik.tuwien.ac.at/files/PubDat_222916.pdf


Erstellt aus der Publikationsdatenbank der Technischen Universitšt Wien.