<div class="csl-bib-body">
<div class="csl-entry">Mirwald, J., Nura, D., Eberhardsteiner, L., & Hofko, B. (2022, July 19). <i>Uncovering the Role of Visible Light on Asphalt Binder Ageing</i> [Conference Presentation]. 59th Petersen Asphalt Research Conference, Laramie, Wyoming, United States of America (the). http://hdl.handle.net/20.500.12708/153396</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/153396
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dc.description.abstract
Asphalt binder ageing is a complex process that researchers are still trying to fully uncover. Various laboratory studies have tackled ageing parameters like temperature, moisture, reactive gasses or UV light. While UV light exhibits the highest photo energy and oxidation potential, its limited availability on earth’s surface can lead to a significantly lower degree of ageing on the pavement surface. However, light in the visible range is present at a much higher percentage, as it is not absorbed as much by our atmosphere compared to UV light. This study shows the impact of UV-visible light in the range of 365 – 770 nm, where the lights intensities were adjusted to mimic the conditions on earth’s surface. Performing Fourier-Transform-Infrared (FTIR) spectroscopy on the aged binder surfaces revealed a unique and characteristic oxidation profile, where blue light in the region of 405 nm and green light in the region of 525 nm induced a significantly higher formation of oxidized species. Furthermore, differences in the ageing products formed can be linked to specific ageing parameters. These first results should act as a basis to better understand how different ageing parameters contribute to field ageing and how to address them in the laboratory.
en
dc.description.sponsorship
CDG Christian Doppler Forschungsgesellschaft
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dc.language.iso
en
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dc.subject
BItumen
en
dc.subject
Ageing
en
dc.subject
Visible Light
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dc.subject
FTIR Spectroscopy
en
dc.title
Uncovering the Role of Visible Light on Asphalt Binder Ageing
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.relation.grantno
Chemo-M46
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dc.type.category
Conference Presentation
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tuw.publication.invited
invited
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tuw.project.title
CD-Labor für Chemo-Mechanische Analyse von bituminösen Stoffen
