A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Characterization of ultrasonic Rayleigh surface waves in asphaltic concrete
This research examines the application of ultrasonic Rayleigh surface waves to the non-destructive evaluation (NDE) of asphaltic concrete in the frequency range 40-100 kHz. Two ultrasonic parameters, the phase velocity and amplitude attenuation, are considered to be sensitive to local compositional and structural variations and are measured. A wedge technique is used to generate Rayleigh surface waves in an asphaltic concrete beam with uniformly distributed aggregate, and this technique is shown to be effective in launching Rayleigh waves in this highly viscoelastic (absorptive) and heterogeneous medium. Three different ultrasonic detection setups using contact and non-contact transducers as receivers are examined and their results are compared. The experimental results show that the wedge generation technique along with an air-coupled receiving transducer with a finite-size aperture is the most reliable for characterizing Rayleigh waves in asphaltic concrete. It is also experimentally demonstrated that the proposed setup may be used to detect aggregate segregation in asphaltic concrete.
Characterization of ultrasonic Rayleigh surface waves in asphaltic concrete
This research examines the application of ultrasonic Rayleigh surface waves to the non-destructive evaluation (NDE) of asphaltic concrete in the frequency range 40-100 kHz. Two ultrasonic parameters, the phase velocity and amplitude attenuation, are considered to be sensitive to local compositional and structural variations and are measured. A wedge technique is used to generate Rayleigh surface waves in an asphaltic concrete beam with uniformly distributed aggregate, and this technique is shown to be effective in launching Rayleigh waves in this highly viscoelastic (absorptive) and heterogeneous medium. Three different ultrasonic detection setups using contact and non-contact transducers as receivers are examined and their results are compared. The experimental results show that the wedge generation technique along with an air-coupled receiving transducer with a finite-size aperture is the most reliable for characterizing Rayleigh waves in asphaltic concrete. It is also experimentally demonstrated that the proposed setup may be used to detect aggregate segregation in asphaltic concrete.
Characterization of ultrasonic Rayleigh surface waves in asphaltic concrete
Charakterisierung von Ultraschall-Rayleigh-Oberflächenwellen in Betonasphalt
In, Chi-Won (author) / Kim, Jin-Yeon (author) / Kurtis, Kimberly E. (author) / Jacobs, Laurence J. (author)
NDT&E International ; 42 ; 610-617
2009
8 Seiten, 10 Bilder, 3 Tabellen, 20 Quellen
Article (Journal)
English
Characterization of dispersive ultrasonic Rayleigh surface waves in asphalt concrete
| Tema Archive | 2008
| TIBKAT | 1962
| Engineering Index Backfile | 1922
| Engineering Index Backfile | 1920
Specification for asphaltic concrete surface course
Engineering Index Backfile | 1929