An extended hot plate method for measurement of thermal conductivity variation with temperature of building materials

[摘要] A new exploitation of the Hot Plate in Steady state HPS on the determination of thermal conductivity variation with temperature is presented. The mean temperature changement with temperature of the tested sample is ensured with varying the value of the voltage applied to the hot plate resistance, which enables to measure the thermal conductivity in different temperatures. Calculated thermal conductivity values obtained using a gypsum plaster sample, which specific heat capacity variation with temperature is accurately measured, validate the technic. Results show that the mean calculated thermal conductivity of the studied gypsum plaster is 0,143 W/m.k while the measured one is 0,148 W/m.k with a mean deviation of 3,81%. Moreover, the two trend lines of measured values and calculated ones have the same slope with a small intercept difference of 0,004.

[发布机构] Materials, Energy and Acoustics TEAM, Higher School of Technology Salé, Mohammed v University in Rabat, 227 Avenue Prince Héritier, 11060, Morocco^1;Laboratory for Integration of Advanced Systems and Technologies, University Sidi Mohamed Ben Abdellah, Faculty of Sciences Dhar El Mehraz, Fez, Morocco^2

[效力级别] 材料科学 [学科分类] 材料科学（综合）

[关键词] Conductivity variation;Hot plates;Mean deviation;Mean temperature;Measured values;Steady state