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On the Applicability of ATR-FTIR Microscopy to Evaluate the Blending between Neat Bitumen and Bituminous Coating of Reclaimed Asphalt

1
EMIB Research Group, Faculty of Applied Engineering, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
2
BioGEM Research Group, Faculty of Applied Engineering, University of Antwerp, Salesianenlaan 90, 2060 Antwerp, Belgium
*
Author to whom correspondence should be addressed.
Coatings 2019, 9(4), 240; https://doi.org/10.3390/coatings9040240
Received: 21 March 2019 / Revised: 4 April 2019 / Accepted: 6 April 2019 / Published: 9 April 2019
(This article belongs to the Special Issue Pavement Surface Coatings)
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Abstract

The utilization of Reclaimed Asphalt (RA) in the road construction sector induces considerable economic and ecological benefits. The blending of the recycled material with new components is believed to be of great importance for the mixture’s properties. An extensive knowledge of the blending of the materials is crucial in optimizing the use of RA, especially at higher recycling rates. In this paper, the applicability of Fourier transform infrared (FTIR) microscopy in attenuated total reflectance (ATR) mode to study the bituminous coating of RA granulates is investigated. This method is a promising alternative to trace heterogeneous areas within the coating compared to methods that require extraction and recovery of bitumen. A method for sample preparation and FTIR spectra analysis is proposed. Four different samples were analyzed: a reference RA granulate, two types of RA granulates mixed with neat bitumen, and a RA granulate with rejuvenator. The results show that the use of ATR-FTIR microscope allows the tracing of different components, indications of blending, as well as proof of rejuvenation of the aged bituminous area. View Full-Text
Keywords: reclaimed asphalt; asphalt recycling; ATR-FTIR microscopy; chemical imaging; ageing; bituminous blending; rejuvenator reclaimed asphalt; asphalt recycling; ATR-FTIR microscopy; chemical imaging; ageing; bituminous blending; rejuvenator
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Margaritis, A.; Tofani, G.; Jacobs, G.; Blom, J.; Tavernier, S.; Vuye, C.; Van den bergh, W. On the Applicability of ATR-FTIR Microscopy to Evaluate the Blending between Neat Bitumen and Bituminous Coating of Reclaimed Asphalt. Coatings 2019, 9, 240.

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