TY - CONF A1 - Wiggenhauser, Herbert A1 - Wilsch, Gerd A1 - Schaurich, Dieter A1 - Wöstmann, Jens T1 - Betonanalyse mit Laserinduzierter Breakdown Spektroskopie (LIBS) N2 - Der große Vorteil der vorgestellten Methode liegt in der quasi on-line Bereitstellung der Ergebnisse und in der Möglichkeit des Einsatzes direkt am Bauwerk. Die vorliegenden Meßergebnisse zeigen den erfolgreichen Einsatz von LIBS zur Messung der Betonzusammensetzung. Eine Unterscheidung von Zementen gelingt durch die Einordnung der Meßwerte ins Dreistoffdiagramm. Neue kleine Laser, handliche Echellespektrographen und neuartige Lichtleiter lassen sich zu mobilen LIBS-Apparaturen kombinieren, die eine Messung undAuswertung vor Ort ermöglicht. T2 - Fachtagung Bauwerksdiagnose - Praktische Anwendungen Zerstörungsfreier Prüfungen CY - Munich, Germany DA - 21.01.1999 KW - Betonzusammensetzung KW - Dreistoffdiagramm KW - Echellespektrographen PY - 1999 AN - OPUS4-36538 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wiggenhauser, Herbert A1 - Wilsch, Gerd A1 - Schaurich, Dieter A1 - Wöstmann, Jens T1 - Application of LIBS in civil engineering for the analysis of concrete N2 - Our aim is the application of LIBS as a simple, quasi on-line method for the non-destructive testing of concrete. Concrete is naturally inhomogeneous. Therefore we must take into account the local variation of the element composition using a statistical analysis. Depending on how much cement and aggregate is measured with each laser pulse, a scan on the surface of a concrete specimen produces a distribution of points in the Rankin diagram which is used to characterise the concrete. T2 - First International Conference on Laser Induced Plasma Spectroscopy and Applications CY - Tirrenia, Italy DA - 08.10.2000 KW - Element composition KW - Statistical analysis KW - Rankin diagramm PY - 2000 AN - OPUS4-36539 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wilsch, Gerd A1 - Schaurich, Dieter A1 - Wöstmann, Jens A1 - Wiggenhauser, Herbert T1 - Nachweis von Hydrophobierungsmitteln mit Laser Induced Breakdown Spectroscopy N2 - Die Eignung des Verfahrens der Laser Induzierten Breakdown Spectroscopy (LIBS) zur Kontrolle einer ausreichenden Beschichtung und zur Bestimmung der Schichtdicke von Hydrophobierungsschichten auch im Rahmen wiederholender Messungen sollte untersucht werden. Mit LIBS kann die Elementverteilung orts- und tiefenaufgelöst in oberflächennahen Bereichen quasi on-line bestimmt werden. Es ist keine Probenpräparation notwendig. Wiederholende Messungen würden das vorzeitige Erkennen beschädigter Beschichtungen ermöglichen, wodurch kostspielige Sanierungsmaßnahmen vermieden werden. T2 - Fachtagung Bauwerksdiagnose - Praktische Anwendungen Zerstörungsfreier Prüfungen CY - Leipzig, Germany DA - 25.10.2001 KW - Beschichtung KW - Schichtdicke KW - Elementverteilung PY - 2001 AN - OPUS4-36540 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wilsch, Gerd A1 - Eichler, Thorsten A1 - Millar, Steven A1 - Schaurich, Dieter ED - Grantham, M. ED - Basheer, P. A. M. ED - Magee, B. ED - Soutsos, M. T1 - Laser induced breakdown spectroscopy (LIBS) - alternative to wet chemistry and micro-XRF N2 - Laser Induced Breakdown Spectroscopy (LIBS) is a combination of laser ablation, plasma formation and optical emission spectroscopy. The possibility of direct measurements on the sample surface, the minimum of necessary sample preparation and the automated setup allows for fast investigations of building materials. In combination with a scanning technique (translation stage or scanning mirrors head) the element distribution can be evaluated in consideration of the material's heterogeneity. LIBS measurements are also time-and cost-saving. The ingress profile of chlorine on a 50mm diameter concrete core up to a depth of 50mm can be measured and evaluated in less than 10 minutes. The results are normally referred to the evaporated mass, which is approximately the cement mass of the specific concrete. As a completion to micro XRF measurements also light elements like sodium or hydrogen can be detected. The spatial resolution of the measurement may reach 50 ìm at a maximum measurement frequency of up to 100 Hz. On the basis of calibration curves, results can be quantified. T2 - Concrete Solutions 2014 CY - Belfast, UK DA - 01.09.2014 KW - LIBS KW - Concrete KW - Alkali-silica reaction (ASR) KW - Chlorine KW - Sodium PY - 2014 SN - 978-1-138-02708-4 SP - 611 EP - 615 PB - CRC Press AN - OPUS4-31722 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Eichler, Thorsten A1 - Wilsch, Gerd A1 - Millar, Steven A1 - Schaurich, Dieter ED - Van Breugel, K. ED - Koenders, E.A.B. T1 - Laser induced breakdown spectroscopy (LIBS) as a tool for the investigation of aging of infrastructure N2 - The laser induced breakdown spectroscopy (LIBS) is a combination of laser ablation and optical emission spectroscopy. Due to the possibility of direct measurements on the sample surface and a minimum of required sample preparation investigations of building materials can be conducted quite fast. In combination with a scanning technique (translation stage or scanning mirrors head) the element distributions are evaluated taking in to account the heterogeneity of the material. This is a significant advantage compared to standard procedures. LIBS measurements are also time and cost saving in comparison to standard methods. The automated measurement procedures minimise the liability for errors. All elements are detectable and after calibration results can be quantified. At BAM LIBS has been successfully applied for the investigation of distribution and transport of different ions in building materials. Quantitative measurements are performed for chlorine, sodium, potassium, sulphur, lithium and hydrogen. Beside this the identification of substances and the evaluation of quantitative ratios by means of an integrated marker are possible. An overview about the principle and the possibilities of LIBS investigations of building materials is presented and typical applications are shown. The LIBS technique is on the step from laboratory application to on-site analyses. T2 - 1st Ageing of materials & structures 2014 conference CY - Delft, The Netherlands DA - 26.05.2014 KW - Concrete deterioration KW - LIBS KW - Element mapping KW - Chemical analysis KW - Heterogeneity KW - Chlorine KW - Sulphur KW - Alkali silica reaction (ASR) PY - 2014 SN - 978-94-6186-313-3 SP - 461 EP - 468 AN - OPUS4-31178 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Taffe, Alexander A1 - Schaurich, Dieter A1 - Wilsch, Gerd A1 - Weritz, Friederike ED - M.G. Alexander, ED - H.-D. Beushausen, ED - F. Dehn, ED - P. Moyo, T1 - Development of a portable LIBS-device for quality assurance in concrete repair T2 - 2nd International Conference on Concrete Repair, Rehabilitation and Retrofitting CY - Cape Town, South Africa DA - 2008-11-24 KW - NDT KW - Laser-induced Breakdown Spectroscopy KW - Quality assurance KW - Damage analysis KW - Concrete repair KW - Chloride KW - Sulphate PY - 2009 SN - 978-0-415-46850-3 SP - 547 EP - 549 PB - CRC Press CY - Boca Raton AN - OPUS4-18601 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wilsch, Gerd A1 - Molkenthin, André A1 - Schaurich, Dieter A1 - Taffe, Alexander A1 - Weritz, Friederike T1 - Chlorid- und Sulfatanalyse mit LIBS - vom Laborverfahren zum Baustellengerät T2 - Fachtagung Bauwerksdiagnose 2008 - Praktische Anwendungen Zerstörungsfreier Prüfungen und Zukunftsaufgaben CY - Berlin, Deutschland DA - 2008-02-21 KW - LIBS KW - Beton KW - Bewehrungskorrosion KW - Chlorid KW - Sulfat PY - 2008 SN - 978-3-940283-08-5 N1 - Serientitel: Berichtsband der Deutschen Gesellschaft für Zerstörungsfreie Prüfung – Series title: Berichtsband der Deutschen Gesellschaft für Zerstörungsfreie Prüfung IS - 112 SP - 1 EP - 8 PB - Deutsche Gesellschaft für Zerstörungsfreie Prüfung CY - Berlin AN - OPUS4-18653 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Molkenthin, André A1 - Wilsch, Gerd A1 - Weritz, Friederike A1 - Taffe, Alexander A1 - Schaurich, Dieter T1 - Visualisierung des Anionen- und Kationentransportes sowie die Quantifizierung des Cl- und S-Gehaltes mittels Laserinduzierter Breakdown-Spektroskopie (LIBS) KW - LIBS KW - Beton KW - Alkali-Kieselsäure Reaktion KW - Tausalz KW - Ionen Transport KW - Chlorid KW - Sulfat PY - 2007 SN - 0514-2946 VL - 1 SP - 30 EP - 33 CY - Wien, Österreich AN - OPUS4-18632 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - 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 - CHAP A1 - Taffe, Alexander A1 - Wilsch, Gerd A1 - Schaurich, Dieter ED - Gieler-Breßmer, S. T1 - Zuverlässige Bestimmung von Chloridgehalten bei der Instandsetzung tausalzgeschädigter Bauwerke T2 - 4. Kolloquium Verkehrsbauten - Schwerpunkt Parkhäuser CY - Ostfildern, Deutschland DA - 2010-02-02 KW - Zerstörungsfreie Prüfung im Bauwesen KW - Chloridanalyse KW - Betoninstandsetzung KW - Parkhäuser KW - LIBS KW - Portables LIBS KW - Tausalz PY - 2010 SN - 3-924813-82-5 IS - Kap. 11.1 SP - 405 EP - 412 CY - Ostfildern AN - OPUS4-20874 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -