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 - Wilsch, Gerd A1 - Gottlieb, Cassian A1 - Millar, Steven A1 - Wiggenhauser, Herbert T1 - Laser induced breakdown spectroscopy (LIBS) – automated 2D chemical analysis of concrete N2 - 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 with a minimum of sample preparation investigations of building materials can be conducted quite fast. In combination with a scanning technique (translation stage or scanning mirrors head) 2D element distributions of harmful species like chlorides and alkalis are evaluated with a sub-mm resolution. By scanning a surface of typically 100 mm x 100 mm the heterogeneity of the material may be considered. LIBS is capable to identify hot spots in element concentration with a resolution of 0.1 mm or even smaller. A LIBS-system for the on-site application on building materials is, in cooperation with system developers and companies which will use this technique for investigation on real structures, under test at BAM. We present an example. Further work will focus on providing guidelines to establish LIBS as a standard procedure for chemical investigations of building materials. T2 - NDE / NDT for Highway and Bridges: Structural Materials Technology CY - Portland, Oregon, USA DA - 29.08.2016 KW - LIBS KW - Concrete KW - Chloride KW - Chemical analysis PY - 2016 SN - 978-1-57117-392-8 SP - 155 EP - 160 PB - The American Society for Nondestructive Testing, Inc. CY - Columbus, OH 43228-0518, USA AN - OPUS4-37679 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Millar, Steven A1 - Gottlieb, Cassian A1 - Wilsch, Gerd A1 - Eichler, Thorsten A1 - Bohling, C. A1 - Molkenthin, A. T1 - Laser induced breakdown spectroscopy (LIBS) - On-site investigatioons on a bridge with a mobile LIBS-system N2 - LIBS is on the step from a laboratory application to on-site analysis. A validated mobile LIBS-system for on-site application on building materials is under development at BAM in cooperation with industrial partners (system developers and companies), who will use this technique for investigation on building structures like bridges and parking decks. The system is designed to measure the content of harmful species like chlorine, sulfur or alkalis, to give the engineer a tool for the estimation of the condition of concrete structures and for quality assurance during concrete repair work on-site. In these work results of on-site measurements on a chloride contaminated bridge are shown. Further work will focus on providing guidelines to establish LIBS as a standard procedure for chemical investigations of building materials. T2 - NDT-CE 2015 - International symposium non-destructive testing in civil engineering CY - Berlin, Germany DA - 15.09.2015 KW - LIBS KW - Chlorides KW - Sulfur KW - Alkalis KW - Corrosion KW - ASR KW - Chemical analysis KW - Chloride KW - Elementanalyse KW - Natrium KW - Baustoffuntersuchungen KW - Baustoffe KW - Dauerhaftigkeit KW - Messsysteme KW - Mobiles LIBS PY - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:b43-345795 UR - http://www.ndt.net/?id=18296 SN - 1435-4934 VL - 20 IS - 11 SP - 1 EP - 5 PB - NDT.net CY - Kirchwald AN - OPUS4-34579 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -