Abstract
Some reinforced concrete damage is caused by the penetration of harmful substances, such as chlo-rine, into the concrete matrix. This can trigger processes such as corrosion. With LIBS it is possible to measure a high-quality chlorine distribution. The results can be expressed in weight percent and show a 2D representation and a detailed ingress profile. In this presentation we will give an overview of how libs work and what important information this method can provide (carbonation, sulfur detection). In addition, a comparison between the wet chemical (standard procedure) and the LIBS results is shown. The advantages of the LIBS results are presented. Information on how much and how deep the chlorine penetrates is important information for civil engineering. Due to the high-resolution mapping it is pos-sible to measure a large number of measurement points on the sample (~100.000 measurement points, Drill core diameter 50 mm, length 100 mm). Each measuring point contains spectral information about the element concentration (measuring point diameter 100 µm). With this information, the data points that are aggregates can be excluded. For this reason, only measuring points relating to the cement paste matrix are considered. In this presentation, practical results are shown, and the added value of the process is presented.
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