Effects of high chloride contamination on direct wave of ground penetrating radar

Wai Lok Lai, Thomas Kind, H. Wiggenhauser

Research output: Unpublished conference presentation (presented paper, abstract, poster)Conference presentation (not published in journal/proceeding/book)Academic researchpeer-review


This paper studied the effects of chloride contamination in concrete on GPR signals, which is considered as a first step to inverse GPR signal parameters to extent of chloride contamination in concrete. It was found that the travel time from the surface to the bar was delayed and the peak-to-valley amplitudes of the direct wave were attenuated. These two time domain results were further observed in joint time-frequency domain (JTFA), where the time domain waveforms were exported to generate spectrograms with short time fourier transform. Frequency spectra in the spectrograms were attenuated and shifted to the lower regimes. These chloride-driven GPR signatures warrants the possibilities of further on-going works about GPR signal inversion and ultimately, characterization of large scale chloride contamination on site.
Original languageEnglish
Publication statusPublished - 2010
EventStructural Materials Technology (SMT) Conference - New York, United States
Duration: 16 Aug 201020 Aug 2010


ConferenceStructural Materials Technology (SMT) Conference
Country/TerritoryUnited States
CityNew York


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