
Proceedings Paper
Identification of subsurface damage in concrete using one sided wave measurementsFormat | Member Price | Non-Member Price |
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Paper Abstract
Surface deterioration is the most common type of concrete damage. In the case of subsurface damage the difficulty of
characterization increases as there is no visual evidence of the crack. Additionally since the close to surface layer of the
material is intact, the sensitivity of the longitudinal wave velocity, which is typically measured for inspection purposes,
is questionable. In the present paper, cracks were created in steel fiber reinforced concrete specimens by four point
bending. Wave characteristics were then measured on the intact surfaces (compression side) using common acoustic
emission transducers. It was seen that although there was no visual sign of the crack, Rayleigh as well as longitudinal
wave velocities were influenced showing clear decrease relatively to the sound material. Additionally other parameters
such as the amplitude or energy of the waves were much more sensitive to damage. In order to explain the results,
numerical simulations were conducted making a parametric study between the depth of the sound layer, the propagating
wavelength and the measured wave parameters. It is concluded that by scanning a surface with simple acoustic one sided
measurements, the identification of the location of the subsurface damage is possible, while the propagating wave gives
information about the form and depth of the crack.
Paper Details
Date Published: 7 April 2009
PDF: 8 pages
Proc. SPIE 7294, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2009, 729406 (7 April 2009); doi: 10.1117/12.815205
Published in SPIE Proceedings Vol. 7294:
Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2009
H. Felix Wu; Aaron A. Diaz; Peter J. Shull; Dietmar W. Vogel, Editor(s)
PDF: 8 pages
Proc. SPIE 7294, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2009, 729406 (7 April 2009); doi: 10.1117/12.815205
Show Author Affiliations
D. G. Aggelis, Univ. of Ioannina (Greece)
T, E. Matikas, Univ. of Ioannina (Greece)
Published in SPIE Proceedings Vol. 7294:
Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2009
H. Felix Wu; Aaron A. Diaz; Peter J. Shull; Dietmar W. Vogel, Editor(s)
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