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Selection of Alternative Additives and their Influence on High-Temperature Resistance of Repair Mortars

Results of an experimental study focused on evaluating the suitability of selected alternative additives and their influence on high temperature resistance of repair mortars based on cement are presented in the article. As an alternative substitute, fly ash and blast furnace slag were selected and added in different dosage up to 10% of cement weight not as a substitution component. Aggregates of amphibolite origin were chosen in regard to the thermal resistance to high temperature.