The influence of water and salt content on the thermal conductivity coefficient of red clay brick

Abstract

This paper presents the results of experiments aimed at the determination of hygro-thermal properties of red clay brick containing water or salt. The main objective of the research is the determination of the relation between the apparent thermal conductivity of brick and its water or Na2SO4 in water solution content. The research is conducted using stationary technique for the dry specimens, as well as the ones containing 25%, 50%, 75% and 100% water or sodium sulphate solution. The experimental results confirm the negative influence of water or sodium sulphate solution on thermal properties of material. However we observe that the presence of Na2SO4 in pores slightly weakens this negative impact.