THERMAL PERFORMANCE AND RESOURCE EFFICIENCY OF GYPSUM CONCRETE CONTAINING LIME WASTE AND REDISPERSIBLE POLYMER POWDER

The study evaluates the thermal performance and resource efficiency of gypsum concrete produced with G-6 gypsum, lime waste generated during technical water treatment, and Redispersible Polymer Powder (RPP). Thermal conductivity was determined for specimens containing 25% lime waste and 0–0.20% RPP. The lowest thermal conductivity coefficient, 0.118 W/(m·°C), was recorded at 0.10% RPP. The experimentally selected composition contained 75% G-6 gypsum, 25% lime waste and 0.10% RPP relative to the mass of dry components. For industrial testing, 750 kg of G-6 gypsum, 250 kg of lime waste and 1.0 kg of RPP were used per 1000 kg of dry components. D900 gypsum concrete mixtures were produced under industrial conditions and 666×500×70 mm gypsum blocks were manufactured. The use of lime waste and RPP reduced G-6 gypsum consumption by up to 25%. The calculated economic effect was 91,940 sum per 1 m³ of modified gypsum concrete and 1,654,920,000 sum per year under the production regime stated in the dissertation.