TY - CONF A1 - Stoppel, Markus A1 - Taffe, Alexander A1 - Wiggenhauser, Herbert A1 - Kurz, J.H. A1 - Boller, C. ED - Grantham, M. ED - Mechtcherine, V. ED - Schneck, U. T1 - Automated multi-sensor systems in civil engineering for condition assessment of concrete structures T2 - Concrete solutions 2011 - 4th International conference on concrete repair (Proceedings) T2 - Concrete solutions 2011 - 4th International conference on concrete repair CY - Dresden, Germany DA - 2011-09-26 KW - Multi sensor KW - Data aquisition KW - Assessment of concrete structures KW - Scanner KW - NDT PY - 2012 SN - 978-0-415-61-622-5 SP - 397 EP - 403 PB - Taylor & Francis CY - London AN - OPUS4-24659 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Niederleithinger, Ernst A1 - Helmerich, Rosemarie A1 - Streicher, Doreen A1 - Stoppel, Markus A1 - Wiggenhauser, Herbert ED - Forde, M. T1 - Automated non-destructive investigation of railway bridge condition T2 - Structural faults & repair 2006 (Proceedings) T2 - 11th International Conference and Exhibiton "Structural Faults and Repair - 2006" CY - Edinburgh, Scotland, UK DA - 2006-06-13 KW - Non-Destructive Testing KW - Automated scanning device KW - Combination of methods KW - Ultrasonic-echo KW - Impact-echo KW - Impulse radar PY - 2006 SN - 0-947644-59-8 SP - 1 EP - 8(?) PB - Engineering Technics Pr., CY - Edingburgh AN - OPUS4-12530 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Reichling, K. A1 - Raupach, M. A1 - Wiggenhauser, Herbert A1 - Stoppel, Markus A1 - Dobmann, G. A1 - Kurz, J. T1 - BETOSCAN - A robotic system for simultaneous diagnoses of reinforced concrete structures T2 - NUCPERF 2009 - Long term performance of cementitious barriers and reinforced concrete in nuclear power plants and waste management (Proceedings) T2 - NUCPERF 2009 - Long term performance of cementitious barriers and reinforced concrete in nuclear power plants and waste management CY - Cadarache, France DA - 2009-03-30 KW - Diagnosis KW - Steel KW - Reinforced concrete KW - BetoScan KW - Betonflächendiagnose KW - Scanner KW - ZfP im Bauwesen KW - Non destructive testing KW - Corrosion PY - 2009 SN - 978-2-35158-072-1 N1 - Serientitel: RILEM proceedings – Series title: RILEM proceedings IS - 64 SP - 1 EP - 7(?) PB - RILEM Publ. CY - Bagneux AN - OPUS4-22485 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Raupach, M. A1 - Reichling, K. A1 - Wiggenhauser, Herbert A1 - Stoppel, Markus A1 - Dobmann, G. A1 - Kurz, J. ED - M.G. Alexander, ED - H.-D. Beushausen, ED - F. Dehn, ED - P. Moyo, T1 - BETOSCAN - An instrumented mobile robot system for the diagnosis of reinforced concrete floors T2 - Proceedings of the international conference on concrete repair, rehabilitation and retrofitting II T2 - 2nd International Conference on Concrete Repair, Rehabilitation and Retrofitting CY - Cape Town, South Africa DA - 2008-11-24 KW - Corrosion KW - Diagnosis KW - Steel KW - Concrete KW - Reinforcement KW - NDT KW - Automated testing KW - Onsite scanner KW - Ultrasonic echo KW - Radar KW - Damage assessment KW - Damage analysis KW - Betoscan PY - 2009 SN - 978-0-415-46850-3 SP - 651 EP - 655 PB - CRC Press CY - Boca Raton AN - OPUS4-18668 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Reichling, K. A1 - Raupach, M. A1 - Wiggenhauser, Herbert A1 - Stoppel, Markus A1 - Dobmann, G. A1 - Kurz, J. ED - Odile Abraham, ED - Dérobert, Xavier T1 - BETOSCAN - Robot controlled non-destructive diagnosis of reinforced concrete decks T2 - NDTCE `09 - 7th international symposium on non destructive testing in civil engineering (Proceedings) T2 - NDTCE `09 - 7th international symposium on non destructive testing in civil engineering CY - Nantes, France DA - 2009-06-30 KW - BetoScan KW - Betonflächendiagnose KW - Scanner KW - ZfP im Bauwesen KW - Automation KW - Corrosion KW - Potential mapping KW - Repair KW - Non destructive testing KW - Diagnosis PY - 2009 SN - 978-2-7208-2542-5 SN - 1628-4704 IS - Paper 77 SP - 425 EP - 432 AN - OPUS4-22487 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Lai Wai-Lok, Wallace A1 - Kind, Thomas A1 - Stoppel, Markus A1 - Wiggenhauser, Herbert T1 - Measurement of accelerated steel corrosion in concrete using ground-penetrating radar and a modified half-cell potential method JF - Journal of infrastructure systems N2 - A new approach is presented to evaluate corrosion of steel bars in concrete by 1.5- and 2.6-GHz ground-penetrating radar (GPR) and a modified half-cell potential method. Changes in time-lapsed travel times, amplitudes, and peak frequencies that are associated with short-time Fourier transform spectrograms of the bar reflections were continuously measured. The year-long corrosion process of the reinforcement bar rapidly accelerated within a few days by impressing direct current across a pair of embedded reinforcement bars, which served as the anode and cathode. When corrosion started, the travel times, amplitudes, and frequency spectra of the bar reflection changed. The results were analyzed by dividing the material's response into three phases (NaCl contamination, depassivation, and corrosion). The writers attribute the phenomena of the first two phases to the ionic conduction and interfacial polarization effect, described in the low-frequency regime of complex dielectric permittivity outlined in the Maxwell-Wagner effect. The remaining phase corresponds with the appearance of large and multiple interfaces among steel, concrete, corrosion product, and cracks, in addition to the upward movement of the corrosion product to the concrete surface that intercepts wider radar footprints. The findings, based on time lapse measurements, provide a basis to further apply the GPR technique to spatial measurements in laboratory and field studies. KW - Accelerated steel corrosion in concrete KW - Ground-penetrating radar KW - Short-time Fourier transform KW - Half-cell potential PY - 2013 DO - https://doi.org/10.1061/(ASCE)IS.1943-555X.0000083 SN - 1076-0342 SN - 1943-555X IS - June SP - 205 EP - 220 CY - New York, NY AN - OPUS4-28851 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Taffe, Alexander A1 - Kind, Thomas A1 - Stoppel, Markus A1 - Wiggenhauser, Herbert ED - M.G. Alexander, ED - H.-D. Beushausen, ED - F. Dehn, ED - P. Moyo, T1 - OSSCAR - Development of an On-Site SCAnneR for automated non-destructive bridge testing T2 - Proceedings of the international conference on concrete repair, rehabilitation and retrofitting II T2 - 2nd International Conference on Concrete Repair, Rehabilitation and Retrofitting CY - Cape Town, South Africa DA - 2008-11-24 KW - NDT KW - Automated bridge testing KW - Onsite scanner KW - Ultrasonic echo KW - Radar KW - Damage assessment KW - Damage analysis KW - OSSCAR PY - 2009 SN - 978-0-415-46850-3 SP - 541 EP - 545 PB - CRC Press CY - Boca Raton AN - OPUS4-18602 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Helmerich, Rosemarie A1 - Niederleithinger, Ernst A1 - Stoppel, Markus A1 - Wiggenhauser, Herbert ED - Mencik, J. T1 - The role of advanced non-destructive techniques in condition assessment of existing bridges T2 - Proceedings of the 2nd International Conference "Reliability, Safety and Diagnostics of Transport Structures and Means 2005" T2 - 2nd International Conference "Reliability, Safety and Diagnostics of Transport Structures and Means 2005" CY - Parduce, Czech Republic DA - 2005-07-07 KW - Condition assessment KW - Non-destructive testing (NDT) KW - Scanning system KW - Impulse radar KW - Ultrasonic echo KW - Impact echo KW - Active thermography KW - LIBS PY - 2005 SN - 80-7194-769-5 SP - 111 EP - 118 PB - University of Pardubice CY - Pardubice AN - OPUS4-7695 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -