par Lefever, Gerlinde;Van Hemelrijck, Danny;Snoeck, Didier ;Aggelis, Dimitrios D.G.
Référence Proceedings of SPIE - The International Society for Optical Engineering, 12047, 120470L
Publication Publié, 2022-08-01
Article révisé par les pairs
Résumé : Self-healing cementitious composites provide a solution to the application of costly, manual repairs of construction elements. Additionally, as the healing mechanism is inherently present within the cementitious mixture, issues concerning the repair of structures with limited accessibility are omitted. However, the assessment of the regained mechanical performance as well as the monitoring of the evolution of the healed properties requires destructive tests, which cannot be applied in situ. For this reason, a non-destructive test set-up based on ultrasonic wave transmission was established. Thanks to the sensitivity of ultrasonic waves to the material properties, significant changes between the uncracked, cracked and the healed state of cementitious specimens can be verified, enabling the crack closure monitoring over time as well as the visualization of the interior. In this study, a comparison between the healing ability of a reference mortar and a mortar with superabsorbent polymers (SAPs) was performed and a correlation with the crack width evolution was demonstrated.