International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

This paper presents the results of studies on the thermophysical and sound-insulating properties of new composite materials intended for interior and exterior plasters in construction. The materials were developed on the basis of foam glass granules and thermally treated rice husks using a specialized methodology. The guarded hot plate method was used to investigate the thermal insulation properties of the composite plasters. Tests for determining the acoustic insulation characteristics were carried out under laboratory conditions using the two-chamber method. The results show that the newly developed composite plasters exhibit better thermal and acoustic insulation properties than the standard plaster compositions traditionally used in construction.

The article presents a study of the sound and thermal insulation properties of ceramic plates with cavities, designed for beehives. The plates are obtained by the “casting” method from a water-dispersed colloidal system based on a patent-protected quartz glass-ceramic. They are composed of amorphous SiO2, mullite and cristobalite. To measure the thermal conductivity, a thermal chamber is constructed with a heater installed in it. Given that the heat flow passing through the three-layer ceramic plate for beehives is constant, the temperature difference between the two opposite sides of the plate at steady state (at constant heat flow) is measured and the thermal conductivity is calculated. A two-chamber method is used to determine the sound insulation capacity of the ceramic plates for beehives. The sound pressure of the sound waves – the incident one and of the wave which has passed through the sample –is measured in the frequency range from 100 to 3150 Hz