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26 ing the emission of СО2 [4]. At the same time, materials based on such types of cement are characterized by high quality, functionality, and durability. Thus, paper [5] shows the effectiveness of the use of multicomponent types of cement based on slag, zeolite, and fly ash in mortars by a high early strength [5]. The positive effect on the strength of concrete under various humid conditions of operation is exerted by admixtures of polydisperse zeolite tuff and perlite [6]. Applying admixtures in the form of zeolite or highly dispersed chalk in cement composition leads to an increase in strength indicators [7], crack resistance [8], and frost resistance of concrete [9].

Design of slag cement, activated by Na (K) salts of strong acids, for concrete reinforced with steel fittings