TY - JOUR A1 - Hong, Shuxian A1 - Lai, W.-L. A1 - Helmerich, Rosemarie T1 - Experimental monitoring of chloride-induced reinforcement corrosion and chloride contamination in concrete with ground-penetrating radar N2 - In this article, we present a laboratory experiment to monitor the accelerated corrosion in concrete using ground-penetrating radar (GPR). Four concrete test specimens were cast with rebars of different size and placed at different depths. The lifetime decades of reinforcement corrosion process were accelerated into 18 days by using the impress current technique. The electrochemical corrosion process was periodically monitored with GPR. Two control specimens were also prepared to investigate the influence of chloride contamination on GPR signal. The measured data were analysed both in time and frequency domains. In time domain, the peak-to-peak amplitude of a wave reflected by a rebar was calculated to investigate the relationship between an increase in signal amplitude and the degree of corrosion. In frequency domain, the time–frequency representations of the signal were computed by using S-transform. The results show that reinforce corrosion increased the amplitude of reflected signal in time domain but did not change the peak frequency in frequency domain while chloride contamination attenuates the signal to smaller amplitude and lower peak frequency. Based on the results, a novel process is finally proposed for GPR-based corrosion detection. KW - Non-destructive KW - Reinforcement corrosion KW - GPR KW - Chloride KW - Moisture KW - S-transform PY - 2015 U6 - https://doi.org/10.1080/15732479.2013.879321 SN - 1573-2479 VL - 11 IS - 1 SP - 15 EP - 26 PB - Taylor & Francis CY - London [u.a.] AN - OPUS4-33085 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -