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NDT.net Issue - 2015-11 - Articles
NDT.net Issue: 2015-11
Publication: International Symposium Non-Destructive Testing in Civil Engineering (NDTCE 2015), 15-17 Sep 2015, Berlin, Germany (NDTCE 2015)
Session: Poster
ARTICLE

Laser Induced Breakdown Spectroscopy (LIBS) – On-site investigations on a bridge with a mobile LIBS-system

Steven Millar14, Cassian Gottlieb14, Gerd Wilsch114, Thorsten Eichler13, Christian Bohling25, André Molkenthin35
1BAM Federal Institute for Materials Research and Testing1326, Berlin, Germany
2SECOPTA GmbH5, Berlin, Germany
3Specht, Kalleja + Partner GmbH4, Berlin, Germany

Abstract: 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 investigations 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. Keywords: LIBS, chlorides, sulfur, alkalis, corrosion, ASR, chemical analysis 1. Introduction Concrete buildings are designed in consideration of a specific expected lifetime. Usually for reinforced concrete structures in civil engineering as e.g. multi-storey car parks a minimum life time of approximately 50 years is strived for. Environmental factors like weather, location or general exposition can force aging- and damage-processes due to deterioration of concrete and/or reinforcement. The ingress of harmful species like CO2 or Cl- causes corrosion of the embedded reinforcement in the concrete structure. In this case especially older ...

Keywords: Corrosion (150), ASR (3), LIBS (3), chlorides (3), alkalis (2), sulfur, chemical analysis,
*Keywords are freely formed keywords from the authors and thus you may Search also for similar terms.

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