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Published in:
2022 | OriginalPaper | Chapter
Applying the Grid Method to Study the Mechanical Behavior at Micro Scale of Asphalt Mixtures Containing Reclaimed Asphalt Pavements
Authors : Ali Moukahal, Mathilde Morvan, Julien Van Rompu, Evelyne Toussaint
Published in: Proceedings of the RILEM International Symposium on Bituminous Materials
Publisher: Springer International Publishing
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Abstract
The objective of this study is to characterize the mechanical performances of reclaimed asphalt pavements (RAP), at different percentages in asphalt mixtures. Six formulations R0, R10, R20, R30, R40 and R50 of the same asphalt mixture formula, a semi-coarse asphalt concrete, with a 35/50 pen bitumen were produced in Colas scientific and technical center, in Magny-les-Hameaux, by introducing 0, 10, 20, 20, 30, 40 and 50% RAP, respectively. Indirect tensile strength tests were carried out on three of these specimens (R0, R30 and R50). Stain fields were calculated using a full field measurement method, named the Grid Method (GM) to compare the behavior of the specimens. This method consists in determining and analyzing both displacement and strain fields on the surface of the specimen. Results highlight the difference in behavior between samples both at the micro- and macro-scales.