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A platform for research: civil engineering, architecture and urbanism
Advances in concrete imaging using a 2.6 GHz GPR antenna
Comparison of ground penetrating radar data obtained with 1.6 and 2.6 GHz antennas over different concrete types with various targets reveals significant enhancement in imaging capability. The expected improvement in vertical and horizontal resolution of targets is observed. Scattering from voids and aggregate in cured concrete was much more apparent in the 2.6 GHz data compared to the 1.6 GHz data. This has important implications in assessing the interior structure of concrete using GPR. For example, lateral changes in the void/aggregate scattering along a concrete slab may infer changes in the structural integrity of the concrete. The change in scattering amplitude with depth, assuming no change in aggregate/void concentration, can be used to calculate GPR signal attenuation which is often related to concrete curing and concrete deterioration. Examination of the data obtained with the 2.6 GHz antenna revealed the amplitudes of the scattering from the aggregate are significantly greater than the noise floor in the data. The ability to image scattering from the interior of concrete using the 2.6 GHz antenna without requiring the presence of reinforcing may lead to significant advances in concrete assessment capability using GPR.
Advances in concrete imaging using a 2.6 GHz GPR antenna
Comparison of ground penetrating radar data obtained with 1.6 and 2.6 GHz antennas over different concrete types with various targets reveals significant enhancement in imaging capability. The expected improvement in vertical and horizontal resolution of targets is observed. Scattering from voids and aggregate in cured concrete was much more apparent in the 2.6 GHz data compared to the 1.6 GHz data. This has important implications in assessing the interior structure of concrete using GPR. For example, lateral changes in the void/aggregate scattering along a concrete slab may infer changes in the structural integrity of the concrete. The change in scattering amplitude with depth, assuming no change in aggregate/void concentration, can be used to calculate GPR signal attenuation which is often related to concrete curing and concrete deterioration. Examination of the data obtained with the 2.6 GHz antenna revealed the amplitudes of the scattering from the aggregate are significantly greater than the noise floor in the data. The ability to image scattering from the interior of concrete using the 2.6 GHz antenna without requiring the presence of reinforcing may lead to significant advances in concrete assessment capability using GPR.
Advances in concrete imaging using a 2.6 GHz GPR antenna
Fortschritte bei der Abbildung von Beton mittels 2,6 GHz Bodenradarantenne
Roberts, Roger (author) / Schutz, Alan (author)
2008
10 Seiten, 11 Bilder, 2 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
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