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A platform for research: civil engineering, architecture and urbanism
Ultrasonic wave dispersion and attenuation in fresh cementitious materials
In this work, the dispersive and attenuative behavior of fresh cementitious materials is examined through a series of ultrasonic Pulse-Echo measurements using the prism technique. Measurements were carried out using prism shaped specimens for different Water Cement Ratios within a short period after mixing. Both pressure and shear waves are generated by mode conversion in a prism-shaped specimens, and to better understand this method, a numerical model based on the Finite Difference in Time Domain has been developed that simulates the elastic wave propagation in the specimen. Theoretical analysis seems to explain the observed dispersion and attenuation mainly through two scattering interactions: sand embedded in paste and air bubbles in mortar. Several snapshots were generated to get more information on the relationship between dispersion effect and the propagation velocities.
Ultrasonic wave dispersion and attenuation in fresh cementitious materials
In this work, the dispersive and attenuative behavior of fresh cementitious materials is examined through a series of ultrasonic Pulse-Echo measurements using the prism technique. Measurements were carried out using prism shaped specimens for different Water Cement Ratios within a short period after mixing. Both pressure and shear waves are generated by mode conversion in a prism-shaped specimens, and to better understand this method, a numerical model based on the Finite Difference in Time Domain has been developed that simulates the elastic wave propagation in the specimen. Theoretical analysis seems to explain the observed dispersion and attenuation mainly through two scattering interactions: sand embedded in paste and air bubbles in mortar. Several snapshots were generated to get more information on the relationship between dispersion effect and the propagation velocities.
Ultrasonic wave dispersion and attenuation in fresh cementitious materials
Ultraschallwellendispersion und -schwächung in frischen zementösen Werkstoffen
Grimes, Morad (author) / Khebli, Abdelmalek (author) / Haddad, Sofine (author) / Benkedidah, Toufik (author) / Dib, Samira (author) / Bouhadjera, Abdelmalek (author)
2009
6 Seiten, 6 Bilder, 3 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
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