TY - GEN A1 - Molkenthin, André A1 - Weritz, Friederike A1 - Schaurich, Dieter A1 - Wilsch, Gerd T1 - Imaging of cation and anion transport in building materials by laser-induced breakdown spectroscopy T2 - 5th International Essen Workshop "Transport in Concrete - Nanostructure and Macrostructure" (TRANSCON 07) CY - Essen, Deutschland DA - 2007-06-11 KW - LIBS KW - Beton KW - Alkali-Kieselsäure Reaktion KW - Tausalz KW - Ionen Transport PY - 2007 SN - 978-3-931681-88-3 SP - 117 EP - 126 PB - Aedificatio Verl. CY - Essen AN - OPUS4-18634 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Weritz, Friederike A1 - Taffe, Alexander A1 - Schaurich, Dieter A1 - Wilsch, Gerd T1 - Visualization of chloride and sulfate ingress into concrete by element distributions and depth profiles determined with laser-induced breakdown spectroscopy (LIBS) T2 - 5th International Essen Workshop "Transport in Concrete - Nanostructure and Macrostructure" (TRANSCON 07) CY - Essen, Deutschland DA - 2007-06-11 KW - Laser induced breakdown spectroscopy KW - Concrete KW - Chloride KW - Sulphate KW - Depth profile PY - 2007 SN - 978-3-931681-88-3 SP - 149 EP - 158 PB - Aedificatio Verl. CY - Essen AN - OPUS4-18635 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 - Wilsch, Gerd A1 - Schaurich, Dieter A1 - Wöstmann, Jens A1 - Wiggenhauser, Herbert T1 - Anwendungen der Laser Induced Breakdown Spectroscopy im Bauwesen N2 - Zusammenfassung Die Laser Induced Breakdown Spectroscopy (LIBS) ist eine analytische Methode mit der die Elementverteilung auf der Oberfläche von Proben orts- und tiefenaufgelöst ermittelt werden kann. Ein intensiver, infraroter Laserstrahl wird auf die Oberfläche fokussiert. Durch die hohe Energiedichte werden einige Mikrogramm Material verdampft und ein Plasma gebildet. Bei der Ausdehnung und Abkühlung des Plasmas wird die charakteristische Fluoreszenz der verdampften Elemente abgestrahlt und mit spektroskopischen Mitteln analysiert. Die Empfindlichkeit der Methode liegt im ppm-Bereich, die typische Messgenauigkeit beträgt einige Prozent. Die Ergebnisse liegen quasi on-line vor, es ist keine Probenpräparation notwendig und die Apparatur ist vor Ort einsetzbar. Im Artikel werden Anwendungen der LIBS zur Untersuchung von Baustoffen beschrieben. Die Ergebnisse der Ermittlung der Salzverteilung in Baustoffen, der Untersuchung der Betonzusammensetzung und dem Nachweis von hydrophobierten Schichten auf unterschiedlichen Baustoffen werden vorgestellt. T2 - Jahrestagung Zerstörungsfreie Materialprüfung 2002 CY - Weimar, Deutschland DA - 2002-05-06 KW - On-line Elementanalyse KW - Salzverteilung KW - Betonzusammensetzung KW - Hydrophobierung PY - 2002 UR - http://www.ndt.net/article/dgzfp02/papers/p29/p29.htm SN - 3-931381-39-0 N1 - Serientitel: Berichtsband / Deutsche Gesellschaft für zerstörungsfreie Prüfung e. V. – Series title: Berichtsband / Deutsche Gesellschaft für zerstörungsfreie Prüfung e. V. IS - 80-CD PB - DGZfP CY - Berlin AN - OPUS4-2216 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Weritz, Friederike A1 - Taffe, Alexander A1 - Schaurich, Dieter A1 - Wilsch, Gerd T1 - Praktische Anwendungen der Laser-Induzierten Plasma Spektroskopie im Bauwesen - Fallstudien an einem Klärbehälter und einem Parkdeck T2 - DGZfP-Fachtagung Bauwerksdiagnose "Praktische Anwendungen Zerstörungsfreier Prüfungen" CY - Berlin, Deutschland DA - 2006-02-22 KW - LIBS KW - Beton PY - 2006 SN - 3-931381-71-4 SP - 1(?) EP - 9(?) PB - DGZfP CY - Berlin AN - OPUS4-12208 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Taffe, Alexander A1 - Schaurich, Dieter A1 - Weritz, Friederike A1 - Wilsch, Gerd ED - Alexander, M. T1 - Chloride and sulphate content in concrete with Laser-Induced Breakdown Spectroscopy (LIBS) T2 - International Conference on Concrete Repair, Rehabilitation and Retrofitting (ICCRRR) CY - Cape Town, South Africa DA - 2006-11-21 KW - LIBS KW - Chloridgehalt KW - Schwefelgehalt KW - Bauwerksuntersuchung KW - Zustandsermittlung KW - Betoninstandsetzung KW - Betonschäden PY - 2006 SN - 0-415-39654-9 N1 - Serientitel: Balkema proceedings and monographs in engineering, water and earth sciences – Series title: Balkema proceedings and monographs in engineering, water and earth sciences SP - 519 EP - 524 PB - Taylor & Francis CY - London AN - OPUS4-11682 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Weritz, Friederike A1 - Taffe, Alexander A1 - Schaurich, Dieter A1 - Wilsch, Gerd ED - Cruz, P. ED - Frangopol, D. T1 - Chloride determination for condition assessment and quality assurance by LIBS T2 - 3rd International Conference on Bridge Maintenance, Safety and Management - "Bridge Maintenance, Safety, Management, Life-Cycle Performance and Cost" CY - Porto, Portugal DA - 2006-07-16 KW - LIBS KW - Chloride KW - Concrete PY - 2006 SN - 0-415-40315-4 N1 - Serientitel: Balkema proceedings and monographs in engineering, water and earth sciences – Series title: Balkema proceedings and monographs in engineering, water and earth sciences SP - 333 EP - 334 PB - Taylor & Francis CY - London AN - OPUS4-13716 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Weise, Frank A1 - Schaurich, Dieter ED - Venzmer, H. T1 - Langzeituntersuchungen zum Austrocknungsverhalten des Hauptgesimses am Zeughaus Berlin T2 - 2. Altbau-Symposium anlässlich der Bautec 2002 CY - Berlin, Deutschland DA - 2002-02-08 PY - 2002 SN - 3-345-00802-5 N1 - Serientitel: Altbauinstandsetzung – Series title: Altbauinstandsetzung IS - 4 SP - 45 EP - 63 PB - Verl. Bauwesen CY - Berlin AN - OPUS4-1838 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Weise, Frank A1 - Schaurich, Dieter T1 - A novel combination of NDT-methods for assessment of moisture conditions in structural members - a case study of the Berlin Zeughaus N2 - The moisture condition of solid brick and sandstone walls of historic buildings may be examined and monitored non-destructively and effectively by means of a novel combination of test methods which provide useful information on planning and monitoring rehabilitation and maintenance measures. Results are presented of an interdisciplinary research project of BAM on the moisture balance in the main cornice area of the Berlin Zeughaus. The main part of the investigations was carried out in 1994 and 1995. The quality of the prognosticated drying out process has been verified annually by means of measurements up to 2002. The depth-resolved local moisture determinations were accomplished with a microwave method developed by BAM. The moisture profiles revealed excessive moisture in the building element and reflected the slow drying process. Additionally, endoscopic examinations and chemical and physical analyses of miniature samples were carried out as well to help interpret the results. Hygrothermal data could be calculated from the quasi non-destructive tests and the parameters determined by the laboratory tests. Based on the 1995 measured moisture profile in the building element, the predicted simulation calculation indicated that a relatively long drying out process must be anticipated. Therefore the planned waterproofing sealing can at the earliest be applied to the surface of the building element in 2005. The good correlation of predicted and measured moisture profiles of the past years demonstrates the high quality of the new combination of test 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/v034/v034.htm SN - 3-931381-49-8 SP - 1 EP - 10(?) PB - DGZfP CY - Berlin AN - OPUS4-2599 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Weise, Frank A1 - Schaurich, Dieter ED - Patitz, G. T1 - Langzeituntersuchungen zum Austrocknungsverhalten des Hauptgesimses am Zeughaus Berlin KW - Baudenkmäler KW - Feuchteuntersuchung KW - Zerstörungsfreie Prüfung KW - Mikrowellenverfahren KW - Hygrothermische Simulation PY - 2004 SN - 3-8167-6443-6 N1 - Serientitel: Monudocthema – Series title: Monudocthema IS - 1 SP - 179 EP - 197 PB - Fraunhofer-IRB-Verl. CY - Stuttgart AN - OPUS4-4824 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Weise, Frank A1 - Henschen, Joachim A1 - Hoffmann, Dirk A1 - Niedack-Nad, Marianne A1 - Rudolph, Michael A1 - Schaurich, Dieter ED - Friese, P. ED - Venzmer, H. T1 - Anwendung und Kombination moderner Untersuchungsverfahren zur Beurteilung des Feuchtehaushalts im Zeughaus Berlin T2 - Vorträge anläßlich der 7. Hanseatischen Sanierungstage CY - Kühlungsborn, Deutschland DA - 1996-11-07 KW - Bauteil KW - Feuchtegehalt KW - Mikrowelle KW - Zeughaus, Berlin PY - 1996 SN - 3-345-00629-4 IS - 7 SP - 182 EP - 207 PB - Verlag für Bauwesen CY - Berlin AN - OPUS4-643 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Weise, Frank A1 - Niedack-Nad, Marianne A1 - Henschen, Joachim A1 - Hoffmann, Dirk A1 - Rudolph, Michael A1 - Schaurich, Dieter ED - Riederer, J. T1 - Complex investigations of the moisture balance in structural members made of natural stone - a case study of the Berlin Zeugnis T2 - 8th International Congress on Deterioration and Conservation of Stone CY - Berlin, Germany DA - 1996-09-30 KW - Stein KW - Naturstein KW - Wasserhaushalt KW - Feuchtigkeit KW - Zeughaus, Berlin PY - 1996 SN - 3-00-000779-2 VL - 1 SP - 441 EP - 451 CY - Berlin AN - OPUS4-647 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -