Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Visualisation of transport processes in building materials by laser induced active thermography
In this paper it has been shown that the method of laser induced active thermography is applicable to various problems concerning the assessment of building materials. We presented two different experiments: Pine sap wood treated with inorganic wood preservatives was investigated. Different concentrations of the preservative could be detected because of their different absorption of the laser wavelength. Moisture content had the same influence for all concentrations. Thus, if the dependence of absorption of the laser wavelength on moisture content is known for one concentration of wood preservative and the dependence of the absorption on the concentration for a certain moisture content, the presented method provides a possibility to measure the surface moisture content. Apart from that, our results show that the thermal diffusivity is higher in the radial direction of the wood sample. First results of laser excitation during water suction in sandstone show the applicability of the method for the investigation of water transport and content in building materials. The thermal diffusivity was shown to be higher in moist samples than in dry ones.
Visualisation of transport processes in building materials by laser induced active thermography
In this paper it has been shown that the method of laser induced active thermography is applicable to various problems concerning the assessment of building materials. We presented two different experiments: Pine sap wood treated with inorganic wood preservatives was investigated. Different concentrations of the preservative could be detected because of their different absorption of the laser wavelength. Moisture content had the same influence for all concentrations. Thus, if the dependence of absorption of the laser wavelength on moisture content is known for one concentration of wood preservative and the dependence of the absorption on the concentration for a certain moisture content, the presented method provides a possibility to measure the surface moisture content. Apart from that, our results show that the thermal diffusivity is higher in the radial direction of the wood sample. First results of laser excitation during water suction in sandstone show the applicability of the method for the investigation of water transport and content in building materials. The thermal diffusivity was shown to be higher in moist samples than in dry ones.
Visualisation of transport processes in building materials by laser induced active thermography
Visualisierung von Transportvorgängen in Baustoffen durch Laser induzierte Thermographie
Harrer, Andrea (Autor:in) / Nies, Daniel (Autor:in) / Pulz, Robert (Autor:in) / Rehmer, Birgit (Autor:in) / Stephan, Ina (Autor:in) / Maierhofer, Christiane (Autor:in)
2010
10 Seiten, 9 Bilder, 1 Tabelle, 8 Quellen
(nicht paginiert)
Aufsatz (Konferenz)
Datenträger
Englisch
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