Author(s): , ,

Keywords: , , , , , , , , , , , , , , , , , , , , , , ,

Abstract: Two calcium silicate boards of different densities, porosities and pore size were analyzed for their thermal properties, specifically thermal conductivity. The boards were heated from room temperature to 400°C and the thermal conductivity was monitored during this time. A separate experiment 'aged' the boards first by heating at 1000°C for 4 hours before testing the thermal conductivity from room temperature to 400°C once again. The experimental results were compared with three pre-existing theories that predict thermal conductivity of porous materials. These three theories are: Russell's, Frey's and Bruggeman's. The theory of Russell and Frey agreed reasonably well with the experimentally determined thermal conductivities, while the theory of Bruggeman did not agree well. 'Aging' the boards had a small but non-negligible effect on the thermal conductivity.

Reference: Journal of Building Physics, 31, 1 (2007) 55-67

DOI: 10.1177/1744259107079020