METHOD OF 3D PRINTING WITH MODIFIED CONCRETE MIXTURE WITH CONTROLLED DURATION OF TECHNOLOGICAL BREAK Russian patent published in 2024 - IPC E04G21/04 B33Y10/00 C04B28/04 E04B2/84 B33Y70/00 

FIELD: construction.

SUBSTANCE: invention can be used for additive production by layer-by-layer extrusion (3D-printing) of construction products, structures, buildings and structures. Technical result is achieved by the fact that method of 3D printing with a modified concrete mixture with a controlled duration of a technological break includes preparation of a concrete mixture, including portland cement, quartz sand and water, extrusion thereof in form of plastic filament through printer dispensing head with laying into design position, preparation of a modified concrete mixture for a transition layer containing the following in wt.%: portland cement 20–30, quartz sand 44.4–69.8, "MasterGlenium ACE 430" superplasticizer based on polycarboxylate ether 0.2–1.2, finely ground pozzolanic component—bio-silica with hydraulic activity of not less than 1,400 mg/g, degree of grinding of not less than 1,100 m²/kg 2–8, organosilicon compound—potassium methylsiliconate 0.1–0.8 and water 7.9–15.9, its laying on a filament from said concrete mixture, implementation of a technological break with subsequent resumption of laying of said filament, wherein before laying transition layer on top of previously laid layer of filament, laying steel electrodes, during the technological break, the laid layers are exposed to an electric field created by passing alternating electric current through the modified concrete mixture by connecting electrodes to a power source—a single-phase portable welding transformer "BlueWeldGamma 4.181", wherein duration of exposure to an electric field is 0.1–3 hours.

EFFECT: provision of possibility to control duration of technological break by method of layer-by-layer extrusion at implementation of long technological breaks.

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