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 concrete with controlled duration of technological break, including preparation of concrete mixture, includes Portland cement, quartz sand and water, extruding it in the form of a plastic filament through the dispensing head of the printer with laying into the design position, preparing the modified concrete mixture for the transition layer containing the following in wt.%: portland cement 20–30, quartz sand 44.4–69.8, polyplast BF superplasticizer based on polycarboxylate ether 0.2–0.4, finely ground pozzolanic component—metakaolin with hydraulic activity of not less than 1,200 mg/g, degree of grinding of not less than 2,000 m2/kg 1–9, organosilicon compound—potassium methylsiliconate 0.1–0.8 and water 8.9–15.7, its laying on filament from said concrete mixture, implementation of a technological break with subsequent resumption of laying of said filament, wherein before laying the transition layer on top of the 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 modified concrete mixture by connecting electrodes to power source—single-phase portable welding transformer "BlueWeldGamma 4.181", wherein duration of exposure to 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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