Determination of thermal properties of porous building material by infrared thermography

The implementation of infrared thermography in measurement of the thermal conduction and the heat capacity of the typical porous building material were investigated. The prism-shaped 4x4x4cm sample was heated-up for 20 seconds by 660nm laser module and the surface temperature changes were recorded continuously by the IR camera. Thereafter, a simple inverse method was applied to determine the researched problem unknowns with the usage of proposed approach. The objective thermal properties, i.e. thermal conductivity and heat capacity, of the clinker brick were estimated. The results were compared with reference measurements performed with Netzsch LFA-427 and DSC-404 equipments.