Determination of Thermal Conductivity of Samples of Materials of Construction Production

One of the important parameters of building materials is thermal conductivity. This paper presents the methodology and results of experimental studies of the thermal conductivity of quartz sand-filled cement composites. In parallel, the influence of the granulometric composition of fillers on the thermal conductivity was studied. The granulometric composition of the filler was varied by mixing three fractions: 0.63–0.315, 0.315–0.16 and less than 0.16 mm. At the stage of preparation for the experiment, the geometric dimensions and mass of the samples were determined. A calibrated copper–constantan thermocouple was fixed in each sample. The measurement results were recorded using an analog-to-digital converter with data recording in a file. A stationary heat flow was passed through the studied material samples in a direc-tion perpendicular to the front (largest) faces of the sample. The heat flux density and temperature of the opposite front faces of the sample were measured using a digital heat flux density meter IPP-2. The measurement error of the heat flux density is (not more than) 5%.