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The aim of this study is to investigate the thermal insulation properties of the construction materials used in the buildings sector. Initially, the effect of moisture on the thermophysical properties of three types of concrete (classic concrete, concrete with cork aggregate and polystyrene concrete) are investigated experimentally. Then a numerical analysis basing on finite differences method is applied in order to examine simultaneous heat and mass phenomena inside studied materials. Through this study, it was found that the presence of water in building materials, even in small quantities significantly modifies their thermophysical properties, which leads an adverse effect on their thermal insulation power. The results indicate that the addition of cork aggregates and polystyrene beads to concrete improves its thermal performance. This work comes also within an economic framework, given the abundance of cork aggregates and polystyrene beads
lightweight concrete, construction materials, thermal properties, heat and mass transfer
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