Experimental monitoring of chloride-induced reinforcement corrosion and chloride contamination in concrete with ground-penetrating radar
| Autor: | Rosemarie Helmerich, Shuxian Hong, Wai Lok Lai |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Mechanical Engineering Rebar Ocean Engineering Building and Construction Geotechnical Engineering and Engineering Geology Signal Chloride Corrosion law.invention law Frequency domain Ground-penetrating radar medicine Geotechnical engineering Time domain Radar Composite material Safety Risk Reliability and Quality Civil and Structural Engineering medicine.drug |
| Zdroj: | Structure and Infrastructure Engineering. 11:15-26 |
| ISSN: | 1744-8980 1573-2479 |
| DOI: | 10.1080/15732479.2013.879321 |
| Popis: | 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... |
| Databáze: | OpenAIRE |
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