“…It means that when activated, it binds and hardens in both water and air. It also gives products hydraulic characteristics (Janic and Gołaszewska 2018). At present, the chemical requirements for slag used in concrete, mortar and slurry are set in the standard PN-eN 15167-1:2007. the results obtained in terms of these requirements are presented in table 9. according to PN-eN 197-1:2012 standard, blast furnace slag is a valuable cement component if it contains at least two-thirds by mass of glassy slag and possesses hydraulic properties when suitably activated.…”