METHOD FOR OBTAINING A LOW-CLINKER HYDRAULIC BINDER BASED ON METALLURGICAL SLAGS FOR THE MANUFACTURE OF FILLING MIXTURES Russian patent published in 2021 - IPC E21F15/00 C04B7/153 C04B28/02 C04B40/00 

FIELD: construction materials industry.

SUBSTANCE: invention relates to the construction materials industry, namely to the production of a low-clinker hydraulic binder based on metallurgical slags for the manufacture of filling mixtures. The method for obtaining a low-clinker hydraulic binder based on the blast furnace metallurgical slag from the Cherepovets Metallurgical Combine for the manufacture of filling mixtures includes grinding granulated blast furnace slag of the Cherepovets Metallurgical Combine (CHMC), followed by mixing the crushed slag with cement. Metallurgical slag from the Oskol Electrometallurgical Combine (OEMC) is additionally crushed, and the grinding of each of these slags is carried out with the introduction of an activator, a solution of sodium silicate in an amount of 0.5%, based on the dry mass of the crushed slag, while the granulated blast furnace metallurgical slag is crushed to a specific surface of 300-400 m²/kg, and the grinding of the metallurgical slag of the OEMC is carried out to a specific surface of 400-500 m²/kg, after which the crushed activated slags are mixed with CEM I 42.5 cement in a ratio (wt. %) cement : slag equal to 34:66, respectively, and 1 part of activated slag from the OEMC is taken per 4 parts of activated slag from the CHMC.

EFFECT: extension of the range of construction material production methods.

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