Contribution to a conference proceedings/Contribution to a book

FZJ-2013-06537

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Nondestructive Evaluation of Moisture and Salinity in Bridge and Parking Decks by the Radar-Magnetic Technique

Krause, H.-J. (Corresponding author)FZJ* ; Friese, M. ; Kathage, A. F. ; Sawade, G. ; Willmes, M.

2013
MFPA Weimar

Please use a persistent id in citations: http://hdl.handle.net/2128/15753

Abstract: The radar-magnetic technique is based on a combination of static magnetic depth determination with the measurement of the propagation time of an electromagnetic radar wave. The rebar in the bridge or parking deck under test are used as reflectors for the two-way reflection time measurement with ground-penetrating radar. The depth of the reflector steel is determined by a measurement of two components of its static magnetic field. This magnetic depth determination is independent of the dielectric properties of the covering materials. Comparison of the radar delay and the magnetically extracted depth yields the averaged dielectric permittivity of the concrete and asphalt cover which can be used to determine its moisture. Provided that the moisture content is high enough, the salinity can be estimated from the reflected radar amplitude using phenomenological calibration curves.

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Contributing Institute(s):

1. Bioelektronik (PGI-8)
2. Bioelektronik (ICS-8)
3. JARA-FIT (JARA-FIT)

Research Program(s):

1. 423 - Sensorics and bioinspired systems (POF2-423) (POF2-423)
2. 453 - Physics of the Cell (POF2-453) (POF2-453)

Appears in the scientific report 2013

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Database coverage:

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