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The results of studies on the synthesis of geopolymers based on mechanically activated mixtures of fly ash from Apatitskaya Thermal Power Plant with magnesium, calcium, strontium, and barium carbonates are presented. It has been shown that in terms of geopolymer strength, calcite CaCO3 is the most effective additive to the fly ash. The influence of the carbonate addition to the fly ash on the physical-mechanical properties of geopolymers has been considered from the standpoint of the reactivity of alkaline earth metal carbonates with respect to the alkaline agent.
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Kalinkin et al. (2023) studied this question.
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