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Assessment of anisotropy in cold in-place recycled materials using shear wave velocity and computed tomography analysis

Lecuru, Quentin, Ethier, Yannic, Carter, Alan et Karray, Mourad. 2025. « Assessment of anisotropy in cold in-place recycled materials using shear wave velocity and computed tomography analysis ». Infrastructures, vol. 10, nº 5.

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Résumé

Pavement materials like hot mix asphalt (HMA) and cold recycled mixes (CRMs) are typically considered isotropic. This study evaluates the anisotropy of a cold in-place recycled (CIR) material using the shear wave velocity (Vs) parameter. The piezoelectric ring actuator technique (P-RAT) is utilized to assess the Vs parameter in three directions in CIR slabs. Similarly, the ultrasonic pulse velocity (UPV) technique is employed to measure P-wave velocities. Both methods evaluate mechanical properties in multiple directions. Complex modulus tests are conducted to link velocities results to |E*| modulus. Finally, computed tomography (CT) scans are performed on the specimens in order to evaluate anisotropy resulting from aggregate alignment. The Vs obtained using P-RAT and the Vp from UPV indicate anisotropy, as the wave velocities differ across the three directions. Differences range from 0.6 to 11.6% in Vs, influenced by measurement location. UPV results are analysed in relation to the |E*| modulus master curves, demonstrating that the first peak arrival time for the P-wave corresponds with the master curve. CT scan analysis reveals that the aggregates tend to be more aligned in the direction of the compacting wheel’s displacement, which also highlights anisotropy.

Type de document: Article publié dans une revue, révisé par les pairs
Professeur:
Professeur
Éthier, Yannic A.
Carter, Alan
Affiliation: Génie de la construction, Génie de la construction
Date de dépôt: 30 juin 2025 20:30
Dernière modification: 08 août 2025 20:36
URI: https://espace2.etsmtl.ca/id/eprint/31057

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