Category: Transient Plane Source
Author(s): Robert Jansson
Abstract: The transient plane source technique was used to simultaneously measure the thermal conductivity, thermal diffusivity, and specific heat of a concrete sample to determine how these properties change when exposed to high temperature. The sample was heated and the properties were measured at 20, 90, 110, 200, 500, and 600oC. At this point, the sample was allowed to cool, and measurements were once again taken at 500, 200, and 20 oC. It was found that after exposure to high temperature, the thermal properties that were investigated had all decreased. To determine if the results from the TPS technique were accurate, the measured specific heats for the concrete samples were compared with measurements using a modulated differential scanning calorimeter and it was found that both techniques produced similar results.
Reference: Proceedings from the fib Task Group 4.3 workshop “Fire Design of Concrete Structures: What now? What next?”, Milan, Italy, December 2-3, 2004