HIGH-STRENGTH FINE-GRAINED CONCRETE BASED ON COMPOSITE BINDER USING TECHNOGENIC MATERIAL Russian patent published in 2020 - IPC C04B28/04 

FIELD: construction.

SUBSTANCE: invention relates to construction materials, in particular to a crude mixture for preparing high-strength fine-grained concrete using man-made material - concrete scrap of destroyed buildings, and can be used for production of frame elements of buildings and structures, both in civil and industrial construction. High-strength fine-grained concrete based on composite binder using technogenic material includes portland cement, active (multifunctional) additive, aggregate and water. Active mineral additive used is a powder modifier consisting of a mixture of alumina cement, microsilica, finely ground concrete scrap with specific surface area of 500 m²/kg, crystalline quartz with specific surface area of 500 m²/kg, limestone with specific surface area of 500 m²/kg and plasticizing additive Melflux 2651F. As filler there used are man-made materials: concrete scrap of fraction of 0.315-2.5 mm and screening of crushing of quartzite sand of fraction of 0.315-1.25 mm at specified ratio of components.

EFFECT: increased durability and reliability of structures due to provision of resistance to operational and climatic effects.

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