Fluorescence spectroscopic investigation of bitumen aged by field exposure respectively modified rolling thin film oven test
| Autor: | Daniel Grossegger, Bernhard Hofko, Hinrich Grothe, Markus Hospodka |
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| Rok vydání: | 2017 |
| Předmět: |
Field exposure
Materials science 0211 other engineering and technologies Analytical chemistry 02 engineering and technology 021001 nanoscience & nanotechnology Fluorescence Fluorescence spectroscopy Asphalt 021105 building & construction Emission spectrum Composite material Thin film 0210 nano-technology Chemical composition Intensity (heat transfer) Civil and Structural Engineering |
| Zdroj: | Road Materials and Pavement Design. 19:992-1000 |
| ISSN: | 2164-7402 1468-0629 |
| Popis: | During ageing the chemical composition of bitumen changes, which is reflected by the change in the distribution of bitumen fractions. By measuring the spectrum of fractions, and by correlating fractional changes during ageing within bitumen with the corresponding spectra, a connection between bitumen’s age and the fluorescence spectrum can be drawn. While the age of bitumen increases, its fluorescence emission intensity decreases. Therefore non-aged, laboratory aged (rolling thin film oven test (RTFOT) and RTFOT + pressure ageing vessel) bitumen and bitumen extracted from asphalt slabs from a test field after different time periods were investigated. The test field confirmed the connection between intensity and ageing time, further the development of an oxidation gradient over the vertical cross section of the asphalt slabs could be observed. A modified RTFOT was conducted to study the effects of different temperatures and operating times on the fluorescence emission spectrum, as well as the influence of ... |
| Databáze: | OpenAIRE |
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