These are masonry concrete slabs of different sizes and shapes used in the production of stoves and ovens. Each element can be made of one of the two special concrete mixtures. In both cases, these are concrete masonry units used in the interior, their surfaces are not visible as they are finished with plaster or tiles.
Masonry units with AKU and SEMI brand names are unreinforced concrete masonry units of dense and light aggregates in accordance with STN EN 771-3, where the used stones and used hydraulic binders ensure their resistance to elevated temperatures min. to + 400 °C.
Fireplace built of AKU plates. Presidential Suite - Grand Hotel Kempinski High Tatras.