TY - JOUR A1 - Wilsch, Gerd A1 - Weritz, Friederike A1 - Schaurich, Dieter A1 - Wiggenhauser, Herbert T1 - Determination of chloride content in concrete structures with laser-induced breakdown spectroscopy JF - Construction & building materials N2 - An important criterion for the evaluation of reinforced concrete structures is the measurement of the chloride content. This will normally be done by time consuming standard chemical methods. We propose the application of a spectroscopic technique, the laser-induced breakdown spectroscopy (LIBS), which provides the advantages of a fast measurement, the potential for on-site application and the possibility to investigate a wide range of different measuring points. The surface can be scanned, or depth profiles are available from cores. Measurements can be performed directly on the sample surface and the results are available in near real time. We present LIBS results measured on concrete cores as well as on grinded and pressed material in comparison with the results of standard chemical methods. The optimum LIBS set-up and the experimental conditions to detect and measure chlorine in building materials are reported. The limits of detection were determined and calibration curves were measured. KW - Chloride content KW - Reinforced concrete KW - Laser-induced breakdown spectroscopy KW - Near real time results KW - Non-destructive testing PY - 2005 DO - https://doi.org/10.1016/j.conbuildmat.2005.06.001 SN - 0950-0618 VL - 19 IS - 10 SP - 724 EP - 730 PB - Elsevier CY - Oxford AN - OPUS4-10830 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -