Sustainable gypsum composites reinforced with basalt technogenic nanofiber

Sustainable composites based on gypsum man-made stone are produced using a technology that excludes the firing stage. It meets the requirements for resource and energy conservation, does not harm the environment and can be used in the production of a number of biopositive building materials. The use of pure dihydrate gypsum from gypsum mold waste in the composition of sustainable gypsum composites predetermines the expansion of the scope of application of materials and products based on it. These wastes are characterized by stable physicochemical and mechanical properties. However, the features of the mineralogical composition require high costs for their use in the production of fired gypsum binders using classical technologies. Binders based on them have low strength and other physical indicators. Application without firing technology allows for the maximum use of all the unique properties of gypsum – creation of a comfortable environment, high resistance in fire conditions, good insulating characteristics, etc. By introducing highly dispersed basalt dust particles into the composition of stable gypsum composites based on dihydrate gypsum, gypsum stone is reinforced and compacted at the micro- and nanoscale levels. This is facilitated by the optimal values of the pressing force and humidity of the raw mix selected during the study. They are important technological parameters. The resulting high-strength gypsum composite is characterized by a fine-crystalline structure with higher performance indicators than conventional gypsum materials due to the screening of the moisture effect on it.