| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Lefever, Gerlinde
Vrije Universiteit Brussel
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2023Monitoring the self-healing evolution of cementitious mixtures with superabsorbent polymers through air-coupled ultrasoundcitations
- 2023Crack closure assessment in cementitious mixtures based on ultrasound measurementscitations
- 2023Ultrasonic evaluation of self-healing cementitious materials with superabsorbent polymers: Mortar vs. concretecitations
- 2023Ultrasonic evaluation of self-healing cementitious materials with superabsorbent polymers: Mortar vs. concretecitations
- 2022Nanomaterials in self-healing cementitious compositescitations
- 2022Evaluation of self-healing in cementitious materials with superabsorbent polymers through ultrasonic mappingcitations
- 2021Sensor Size Effect on Rayleigh Wave Velocity on Cementitious Surfacescitations
- 2020The influence of superabsorbent polymers and nanosilica on the hydration process and microstructure of cementitious mixturescitations
- 2020Superabsorbent polymers and nanosilica for mitigation of autogenous shrinkage and promotion of self-healing of cementitious materials
- 2020Chasing the Bubble: Ultrasonic Dispersion and Attenuation from Cement with Superabsorbent Polymers to Shampoocitations
- 2020Evaluation of the Self-Healing Ability of Mortar Mixtures Containing Superabsorbent Polymers and Nanosilicacitations
- 2020The contribution of elastic wave NDT to the characterization of modern cementitious mediacitations
- 2018Assessment of the effect of nanosilica on the mechanical performance and durability of cementitious materialscitations
Places of action
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article
Sensor Size Effect on Rayleigh Wave Velocity on Cementitious Surfaces
Abstract
Concrete properties and damage conditions are widely evaluated by ultrasonics. When access is limited, the evaluation takes place from a single surface. In this case, the sensor size plays a crucial role due to the “aperture effect”. While this effect is well documented regarding the amplitude or the frequency content of the surface (or Rayleigh) wave pulses, it has not been studied in terms of the wave velocity, although the velocity value is connected to concrete stiffness, porosity, damage degree, and is even empirically used to evaluate compressive strength. In this study, numerical simulations take place where sensors of different sizes are used to measure the surface wave velocity as well as its dependence on frequency (dispersion) and sensor size, showing the strong aperture effect and suggesting rules for reliable measurements on a concrete surface. The numerical trends are also validated by experimental measurements on a cementitious material by sensors of different sizes.