ABSTRACT
Experimental results concerning the temperature dependent thermophysical properties of EPB-Expanded Perlite Board below atmospheric pressure are presented. Thermal conductivity and specific heat are simultaneously estimated as a function of temperature by processing the thermal response of the material subjected to a transient heat conduction experiment. The Kalman filtering technique is adopted as the identification algorithm in the iterative linearized version. Tests are performed with dried air as gas filler from atmospheric pressure to 5 jabar. The temperature interval investigated in the experiments ranges from 290 K to 400 K. Preliminary results show that under vacuum condition the apparent thermal conductivity of the expanded perlite board, which is an open pore material, is reduced by approximately a factor four with respect to the corresponding values at atmospheric pressure.
