Ceramics-Silikáty 68, (3) 328 - 341 (2024)

Due to sustainability goals, there is an increasing need to recycle waste. In this concrete study, waste from the concrete production industry – concrete slurry, and glass industry waste were used. The concrete slurry was obtained by washing equipment in the concrete industry. The glass processing waste was obtained from technical water. The wet concrete slurry was used to replace the amount of water, the dry concrete slurry was used to replace the amount of fine aggregate, and the glass processing waste was used to replace the amount of cement from 5 % to 30 %. Thus, cement, sand, gravel, a superplasticiser, a crystallising admixture, and an air-entraining admixture were used in the concrete composition. In all the compositions, the same w/c ratio was maintained. For the fresh concrete mix, the density, air content, and hydration heat release were determined. For the hardened specimens, the speed of the ultrasound pulse propagation, density, compressive strength, water absorption, microstructure, and porosity parameters were determined. The determined mechanical properties indicate that replacing up to 20% of cement with glass processing waste improves the results.