COMPOSITION OF CONSTRUCTION MIXTURE FOR REPAIR PURPOSES Russian patent published in 2025 - IPC C04B28/04 C04B14/06 C04B14/28 C04B18/12 C04B14/42 

FIELD: construction materials.

SUBSTANCE: invention relates to composite construction materials, namely to multicomponent construction mixtures for repair purposes for external and internal use, for repair and restoration works of concrete and reinforced concrete structures and structures with pronounced surface and volumetric destruction. Composition of the construction mixture for repair purposes contains portland cement HEM I 42.5 N, screenings, a plasticising additive based on polycarboxylate esters and water. According to the invention, limestone crushing screenings with clay and dust particles are used, as a plasticising additive based on polycarboxylate esters, Elocrete 5000 D is used and the construction mixture additionally contains sand with a fineness modulus of 1.9, mineral limestone filler, expanding additive “ДР-50”, defoaming agent Defarm-01, redispersible powder “РП 2032” and aluminosilicate microspheres M 50-100, at a certain ratio of components.

EFFECT: high density, compression and bending strength, water impermeability and frost resistance of concrete obtained based on the composition of the construction mixture for repair purposes.

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