HEAT TREATMENT OF BASALT FIBER REINFORCED EXPANDED CLAY CONCRETE WITH INCREASED STRENGTH FOR CAST-IN-SITU CONSTRUCTION Article Kharun M., Klyuev S., Koroteev D., Chiadighikaobi P.C., Fediuk R., Olisov A., Vatin N., Alfimova N. Fibers. MDPI AG. Vol. 8. 2020. P. 1-16