TY - JOUR A1 - Maierhofer, Christiane A1 - Brink, Arne A1 - Röllig, Mathias A1 - Wiggenhauser, Herbert T1 - Quantitative Impulse-Thermography as Non-Destructive Testing Method in Civil Engineering - Experimental Results and Numerical Simulations N2 - Impulse-thermography is an active method for quantitative investigation of the near surface region of various structures which has recently been applied to civil engineering. It is well suited for the detection of voids and honeycombing in concrete up to concrete covers of 10 cm and more. For quantitative analysis, a computer program for numerical simulation of the heating up and cooling down processes was developed based on Finite Differences. With this program parameter studies have been performed for investigating the influence of environmental conditions, material parameters and geometry on the thermal behaviour. The comparison between experimental and simulated results enables the Inverse Solution. KW - Impulse-thermography KW - Numerical simulation KW - Non-destructive testing KW - Concrete KW - Civil engineering PY - 2005 SN - 0950-0618 VL - 19 IS - 10 SP - 731 EP - 737 PB - Elsevier CY - Oxford AN - OPUS4-3162 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Maierhofer, Christiane A1 - Brink, Arne A1 - Röllig, Mathias A1 - Wiggenhauser, Herbert A1 - Hillemeier, B. A1 - Rieck, C. T1 - Struktur- und Feuchteuntersuchung in Betonstrukturen mit der Impuls-Thermografie KW - Zerstörungsfreie Prüfung im Bauwesen KW - Impuls-Thermografie KW - Beton KW - Hohlstellen KW - Kiesnester KW - Simulation PY - 2003 UR - http://www3.interscience.wiley.com/cgi-bin/jtoc/60500216/2005 SN - 0171-5445 SN - 1437-0980 VL - 25 IS - 1 SP - 22 EP - 26 PB - Ernst CY - Berlin AN - OPUS4-3164 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wilsch, Gerd A1 - Weritz, Friederike A1 - Schaurich, Dieter A1 - Wiggenhauser, Herbert ED - Forde, M. C. T1 - Determination of chloride content in concrete structures with laser-induced breakdown spectroscopy T2 - 10th Structural Faults + Repair Conference CY - London, England, UK DA - 2003-07-01 KW - Chloride content KW - Laser induced breakdown spectroscopy (LIBS) KW - On-line results KW - Reinforced concrete PY - 2003 SN - 0-947644-53-9 PB - Engineering Technics Press CY - Edinburgh AN - OPUS4-3367 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Wilsch, Gerd A1 - Schaurich, Dieter A1 - Weritz, Friederike A1 - Wiggenhauser, Herbert T1 - Laser-induced breakdown spectroscopy for on-site determination of chloride in concrete N2 - The Chloride content is an important factor which influences the durability of concrete structures. The standard methods are mostly intricate, time consuming and require a chemical laboratory. This article describes the application of a spectroscopic method, the laser-induced breakdown spectroscopy (LIBS), for the determination of Chloride contents in concrete and mortar specimens. LIBS can be used on-site, needs no sample preparation and is able to investigate rapidly a large number of different measuring points. The LIBS set-up and the experimental conditions to detect Chlorides are reported. Calibration curves are presented and the limit of detection (LOD) is determined. Results measured on different concrete cores are presented and compared with the results of standard chemical methods. T2 - 6th International Symposium Non-Destructive Testing in Civil Engineering (NDT-CE) CY - Berlin, Germany DA - 2003-09-16 PY - 2003 UR - http://www.ndt.net/article/ndtce03/papers/v011/v011.htm SN - 3-931381-49-8 SP - 1(?) EP - 11(?) PB - DGZfP CY - Berlin AN - OPUS4-3368 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Weritz, Friederike A1 - Wilsch, Gerd A1 - Schaurich, Dieter A1 - Wiggenhauser, Herbert T1 - Laser Induced Breakdown Spectroscopy as a tool for the characterization and sorting of concrete waste material in view of high-order re-use N2 - The high amount of building waste material requires innovative strategies for high-order re-use of the material. With Laser Induced Breakdown Spectroscopy (LIBS) both the elemental composition of building materials and trace elements can be determined with a real-time measurement, even on-site and in a harsh industrial environment. We present the experimental data on heavy metal detection in the ppm concentration range, as well as calibration curves. Further on we demonstrate the characterization of cement and concrete concerning the main components by means of Rankin diagrams. We suggest an implementation of LIBS in the processing of building waste materials to allow a high-order re-use. T2 - 6th International Symposium Non-Destructive Testing in Civil Engineering (NDT-CE) CY - Berlin, Germany DA - 2003-09-16 PY - 2003 UR - http://www.ndt.net/article/ndtce03/papers/p032/p032.htm SN - 3-931381-49-8 SP - 1(?) EP - 7(?) PB - DGZfP CY - Berlin AN - OPUS4-3369 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Brink, Arne A1 - Wedler, Gerd A1 - Maierhofer, Christiane A1 - Röllig, Mathias A1 - Weritz, Friederike A1 - Wiggenhauser, Herbert T1 - Active infrared thermography in civil engineering - quantitative analysis by numerical simulation N2 - The cooling-down process of building structures after heating-up with an external radiation source was analysed to detect voids inside and below the surface. Quantitative results of concrete test specimen containing voids with different sizes at various depths will be presented here. The experimental results were compared to numerical simulations performed with a Finite Difference program developed at BAM. T2 - 6th International Symposium Non-Destructive Testing in Civil Engineering (NDT-CE) CY - Berlin, Germany DA - 2003-09-16 KW - Non-destructive testing in civil engineering KW - Acitve thermography KW - Concrete KW - Voids KW - Numerical SImulation KW - Finite differences PY - 2003 UR - http://www.ndt.net/article/ndtce03/papers/p024/p024.htm SN - 3-931381-49-8 SP - 1 EP - 8(?) PB - DGZfP CY - Berlin AN - OPUS4-3403 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Arndt, Ralf A1 - Maierhofer, Christiane A1 - Röllig, Mathias A1 - Weritz, Friederike A1 - Wiggenhauser, Herbert T1 - Structural investigation of concrete and masonry structures behind plaster by means of pulse phase thermography T2 - 7th International Conference on Quantitative Infrared Thermography (QIRT 2004) CY - Rhode-St-Genese, Belgien DA - 2004-06-05 KW - Pulse phase thermography KW - Nondestructive testing in civil engineering KW - Plaster KW - Concrete KW - Masonry KW - Delaminations KW - Voids PY - 2004 SP - I.3.1 EP - I.3.6 PB - Karman Institute for Fluid Dynamics CY - Rhode-St-Genese AN - OPUS4-4397 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Taffe, Alexander A1 - Gardei, André A1 - Krause, Martin A1 - Maierhofer, Christiane A1 - Wiggenhauser, Herbert T1 - Automatisierung zerstörungsfreier Prüfverfahren für das Bauwesen N2 - In der BAM wurde als Gemeinschaftsvorhaben der Fachgruppe „Zerstörungsfreie Schadensdiagnose und Umweltmessverfahren“ ein rechnergesteuerter Messabtaster für Bauwerksteile (Baustellenscanner) entwickelt. Es handelt sich um ein auf Schienen verfahrbares modulares System mit einem multifunktionalen Messkopf für mehrere zerstörungsfreie Prüfverfahren. Mit dem Baustellenscanner können Objekte wie Brücken oder Fundamentplatten schneller und genauer als bisher bei gleichzeitig reduziertem Personalaufwand untersucht werden. PY - 2004 DO - https://doi.org/10.1515/mt-2004-0397 SN - 0025-5300 VL - 46 IS - 7-8 SP - 397 EP - 403 PB - Carl Hanser Verlag CY - München AN - OPUS4-4401 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Taffe, Alexander A1 - Schaurich, Dieter A1 - Weritz, Friederike A1 - Wiggenhauser, Herbert A1 - Wilsch, Gerd T1 - Ermittlung des Chloridgehaltes von Betonproben mit Laser-Induzierter Breakdown Spektroskopie (LIBS) T2 - 1. Kolloquium "Verkehrsbauten - Schwerpunkt Parkhäuser" CY - Esslingen, Deutschland DA - 2004-01-27 PY - 2004 SP - 651 EP - 657 PB - Techn. Akad. Esslingen CY - Esslingen AN - OPUS4-4402 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Wiggenhauser, Herbert A1 - Taffe, Alexander ED - Cziesielski, E. T1 - Zerstörungsfreie Prüfung im Bauwesen - Einleitung PY - 2004 SN - 3-433-01705-0 SP - 309 EP - 310 PB - Ernst CY - Berlin AN - OPUS4-4421 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wiggenhauser, Herbert T1 - Laser-Induced Breakdown Spectroscopy for On-Site Determination of Chloride and Sulfur content T2 - Structural Materials Technology (SMT), NDE/NDT for Highways and Bridges 2004 CY - Buffalo, NY, USA DA - 2004-09-14 PY - 2004 AN - OPUS4-4493 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wiggenhauser, Herbert T1 - Bildgebende Untersuchung von Spannkanälen mit komplementären zerstörungsfreien Prüfverfahren T2 - Tagung "Bildgebende ZfP-Methoden-Aussagekraft-Messunsicherheit", EMPA Akademie Dübendorf CY - Dübendorf, Switzerland DA - 2004-04-01 PY - 2004 AN - OPUS4-4570 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kohl, Christoph A1 - Krause, Martin A1 - Maierhofer, Christiane A1 - Mayer, K. A1 - Wöstmann, Jens A1 - Wiggenhauser, Herbert T1 - 3D-visualisation of NDT data using a data fusion technique KW - Non-destructive testing KW - Radar KW - Ultrasonic KW - Data fusion KW - SAFT PY - 2003 SN - 0007-1137 VL - 45 IS - 12 SP - 800 EP - 808 PB - British Institute of Non-Destructive Testing CY - Northampton AN - OPUS4-4585 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wiggenhauser, Herbert T1 - Development and Application of Echo-Methods for NDE of Post Tensioned Concrete Bridges T2 - 2nd International Conference on Bridge Maintenance, Safety and Management (IABMAS '04) CY - Kyoto, Japan DA - 2004-10-18 PY - 2004 AN - OPUS4-4556 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Kohl, Christoph A1 - Krause, Martin A1 - Maierhofer, Christiane A1 - Wöstmann, Jens A1 - Wiggenhauser, Herbert T1 - Datenfusion komplementärer Impuls-Echo Verfahren zur zerstörungsfreien Untersuchung von Betonbauteilen T2 - Jahrestagung Zerstörungsfreie Materialprüfung 2004 CY - Salzburg, Österreich DA - 2004-05-17 KW - Zerstörungsfreie Prüfung im Bauwesen KW - Radar KW - Ultraschall KW - Impact-Echo KW - Datenfusion KW - SAFT PY - 2004 UR - http://www.ndt.net/article/dgzfp04/papers/p37/p37.htm SN - 3-931381-55-2 SP - 1 EP - 15(?) PB - DGZfP CY - Berlin AN - OPUS4-5603 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wiggenhauser, Herbert T1 - Zerstörungsfreie Feuchtemessung an Bauwerken T2 - Kolloquium Innovative Feuchtemessung CY - Karlsruhe, Germany DA - 2003-07-03 PY - 2003 AN - OPUS4-5677 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wiggenhauser, Herbert T1 - On-site investigation techniques for the structural assessment of historic masonry buildings T2 - 5th EC Conference Cultural Heritage Research: A Pan European Challenge CY - Kraków, Poland DA - 2002-05-16 PY - 2002 AN - OPUS4-6082 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wiggenhauser, Herbert T1 - Automated Non-Destructive Testing of Highway Bridges with Radar, Ultrasonic and Impact-Echo T2 - Transportation Research Board of the National Academies, 83rd Annual Meeting 2005 CY - Washington, D.C., USA DA - 2005-01-13 PY - 2005 AN - OPUS4-6900 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wiggenhauser, Herbert T1 - Bewehrungssuche, -überdeckung und Hüllrohruntersuchungen: Radar, Ultraschall und Impakt-Echo als zerstörungsfreie Prüfverfahren T2 - 49. Ulmer Beton- und Fertigteiltage "Faszination Beton" CY - Neu-Ulm, Deutschland DA - 2005-02-15 PY - 2005 SN - 0373-4331 N1 - Sprachen: Deutsch/Englisch - Languages: German/English VL - 71 IS - 2 SP - 180 EP - 181 PB - Bauverl. BV CY - Gütersloh AN - OPUS4-7333 LA - mul AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Tinkey, Y. A1 - Olson, L.D. A1 - Wiggenhauser, Herbert T1 - Impact Echo Scanning for Discontinuity Detection and Imaging in Posttensioned Concrete Bridges and Other Structures KW - Impact-Echo KW - NDT KW - Civil Engineering PY - 2005 UR - http://www.ultrasonic.de/article/v04n05/plakat22/plakat22.htm SN - 0025-5327 VL - 63 IS - 1 SP - 64 EP - 69 PB - Society for Nondestructive Testing CY - Columbus, Ohio AN - OPUS4-7335 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -