RAW MATERIAL MIXTURE FOR 3D PRINTER EXTRUSION Russian patent published in 2022 - IPC C04B28/04 C04B111/20 B33Y70/00 

FIELD: construction materials.

SUBSTANCE: invention relates to the field of the construction materials industry and can be used for the manufacture of building products and structures in additive manufacturing technology by layer-by-layer extrusion (3D printing) of a raw material mixture. The raw material mixture for extrusion on a 3D printer includes, wt. %: Portland cement containing, wt. %: tricalcium silicate 68.1, tricalcium aluminate 7.2, 20.0-23.0, quartz sand with a grain size of 2.2-2.4 and a moisture content of 1-2% 62.44-65.84; MasterGlenium 430 superplasticizer based on polycarboxylate esters 0.20-0.23; finely ground pozzolan component, bio-silicon with hydraulic activity of at least 1400 mg/g, grinding degree of at least 1100 m²/kg 2.0-2.3; methylsilantriol potassium salt “GKZH-11K” 0.010-0.012; water 11.950-12.018.

EFFECT: reducing the consumption of Portland cement and superplasticizer in the raw material mixture, increasing shape stability and ensuring the absence of defects in the form of ruptures of printed layers from the raw material mixture with the possibility of its extrusion on construction 3D printers implementing the method for layer-by-layer extrusion, reducing shrinkage deformations, water absorption and increasing the bending strength of hardened composites printed on a 3D printer.

1 cl, 2 tbl