NDLI: Monitoring the evolution of water and chloride in concrete using GPR full-waveform inversion

Content Provider	IEEE Xplore Digital Library
Author	Kalogeropoulos, A. van der Kruk, J. Hugenschmidt, J.
Copyright Year	2011
Description	Author affiliation: Forschungszentrum Jülich, Germany (van der Kruk, J.) \|\| EMPA, Dübendorf, Switzerland (Kalogeropoulos, A.; Hugenschmidt, J.)
Abstract	The assessment of ageing concrete structures is a major technical challenge faced by the Civil Engineers of today. Concrete bridges are exposed to corrosion from the spreading of de-icing salts on roads during winter. Corrosion is problematic because it reduces the reinforcement's load carrying capacity and a long-term consequence can be structural failure. This paper describes an experiment that consisted in exposing a concrete specimen to a controlled wetting-drying cycle using a saline solution. This setup enabled the concentration of chlorides to be distributed in gradients inside the specimen. A novel methodology to estimate material properties, based on ground penetrating radar (GPR) full-waveform inversion, was used to process GPR traces. In this paper, each reflection present in the trace was regarded independently. This procedure was applied to a dataset acquired with bistatic off-ground GPR antennas. Measurements were carried out above the test specimen at regular time lapses. This allowed monitoring of the electromagnetic parameters of the top and bottom concrete specimen surfaces during the wetting-drying cycle.
Starting Page	1
Ending Page	6
File Size	298227
Page Count	6
File Format	PDF
ISBN	9781457703324
DOI	10.1109/IWAGPR.2011.5963904
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-22
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Concrete Ground penetrating radar Antenna measurements Corrosion Electromagnetics Frequency measurement Green function full-waveform inversion Non-destructive testing GPR monitoring chloride and water content in concrete
Content Type	Text
Resource Type	Article

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