Thermal and absorption properties of unburnt clay samples
2009
Kasperiunaite, D., Lithuanian Univ. of Agriculture, Akademija, Kauno reg. (Lithuania) | Navickas, J., Kaunas College of Forestry and Environmental Engineering (Lithuania) | Ziemelis, I., Latvia Univ. of Agriculture, Jelgava (Latvia)
Unburnt clay might be used as a building material for construction of both economic buildings and even dwelling houses. This is especially relevant in rural areas as thus energy is saved, employment of local inhabitants is increased and building costs are reduced. The purpose of this work is to investigate the dependence of the density of unburnt clay samples on the technology of their production - extruding pressure and absolute humidity of the forming mass; also dependence of heat conductivity and water vapour absorption capability of unburnt clay samples on the absolute humidity of the forming mass while using 40 MPa pressure. It is also aimed to investigate the dependence of heat conductivity of the samples on absolute humidity of these samples during measurements. Another purpose is to determine relevance of absolute humidity of the forming mass and absolute humidity of samples during the period of investigation on heat conductivity. Dependence of density of formed and dried samples on the technology of their production was established. Hypothesis for explanation of this dependence was suggested. Dependence of samples' heat conductivity and water vapour absorption on the technology of their production and absolute humidity of samples during the period of investigation were determined. A model for explanation of this dependence was suggested. Prediction of heat conductivity pursuant to the forming mass of unburnt clay samples and absolute humidity of these samples was done applying linear regression. Significance of the samples forming mass and absolute humidity of samples on heat conductivity was determined.
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