Experimental investigation of blending phenomena in intergranular zones of recycled asphalt mixtures using customized infrared imaging and stage extraction methods

In the recycling road industry, a fundamental knowledge of blending mechanisms between the aged and virgin binders is necessary. An infrared imaging methodology is customized to assess the blending in different recycled asphalt mixtures. Obtained results are compared to those of another stage extrac...

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Bibliographic Details
Published in:Construction & building materials 2019-07, Vol.213, p.234-245
Main Authors: Vassaux, S, Gaudefroy, Vincent, Boulangé, L, Pévère, A, Michelet, A, Barragan-Montero, V, Mouillet, V
Format: Article
Language:English
Subjects:
Chemical Sciences
Condensed Matter
Materials Science
Physics
Online Access:Get full text
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Summary:In the recycling road industry, a fundamental knowledge of blending mechanisms between the aged and virgin binders is necessary. An infrared imaging methodology is customized to assess the blending in different recycled asphalt mixtures. Obtained results are compared to those of another stage extraction technique. Both methods show that RA materials behave differently according to the process. Furthermore, the infrared methodology is highly-sensitive to understand blending scenarii: as remobilization is lower in warm-mix processes, the intergranular zone appears less oxidized and more homogeneous. This study encourages mix designers to optimize current blending laws with the introduction of a remobilization degree.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2019.04.045