A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Imaging laser analysis of building materials. Practical Examples
The Laser induced Breakdown Spectroscopy (LIBS) is supplement and extension of standard chemical methods and SEM- or Micro-RFA-applications for the evaluation of building materials. As a laboratory method LIBS is used to gain color coded images representing composition, distribution of characteristic ions and/or ingress characteristic of damaging substances. To create a depth profile of element concentration a core has to be taken and split along the core axis. Examples of practical application of LIBS for direct measurement on samples with minor sample preparation and imaging of element distributions on sample surface with mm-resolution are given. LIBS purvey fast quantitative results regarding the natural heterogeneity of building materials (results relating to the cement content). Automated measurement and evaluation of 10 cm by 10 cm area in mm resolution takes less than 5 minutes. Investigation of a large number of samples under consideration of different parameters to investigate the ion migration is possible. After calibration with reference samples LIBS is able to provide quantitative results. The limit of detection depends from matrix, element and experimental conditions. For chlorine the LOD is at least 0.5 %. Mobile LIBS was setup and tested on-site; validation is in progress.
Imaging laser analysis of building materials. Practical Examples
The Laser induced Breakdown Spectroscopy (LIBS) is supplement and extension of standard chemical methods and SEM- or Micro-RFA-applications for the evaluation of building materials. As a laboratory method LIBS is used to gain color coded images representing composition, distribution of characteristic ions and/or ingress characteristic of damaging substances. To create a depth profile of element concentration a core has to be taken and split along the core axis. Examples of practical application of LIBS for direct measurement on samples with minor sample preparation and imaging of element distributions on sample surface with mm-resolution are given. LIBS purvey fast quantitative results regarding the natural heterogeneity of building materials (results relating to the cement content). Automated measurement and evaluation of 10 cm by 10 cm area in mm resolution takes less than 5 minutes. Investigation of a large number of samples under consideration of different parameters to investigate the ion migration is possible. After calibration with reference samples LIBS is able to provide quantitative results. The limit of detection depends from matrix, element and experimental conditions. For chlorine the LOD is at least 0.5 %. Mobile LIBS was setup and tested on-site; validation is in progress.
Imaging laser analysis of building materials. Practical Examples
Abbildende Laseranalyse von Gebäudewerkstoffen. Praktische Beispiele
Wilsch, G. (author) / Schaurich, D. (author) / Wiggenhauser, H. (author)
2011
8 Seiten, 9 Bilder, 7 Quellen
Conference paper
Storage medium
English
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