GYPSUM-CEMENT-POZZOLANIC MODIFIED CONSTRUCTION MIXTURE FOR 3D PRINTER Russian patent published in 2024 - IPC C04B28/14 C04B28/04 C04B111/20 C04B111/27 B33Y70/00 

FIELD: construction.

SUBSTANCE: invention relates to the industry of construction materials and can be used for production of construction articles and structures in technology of additive production by method of layer-by-layer extrusion (3D-printing) of crude mixture. Gypsum-cement-pozzolanic modified construction mixture for 3D printer contains, wt.%: portland cement containing, wt.%: tricalcium silicate 63.0, tricalcium aluminate 6.1, 5.59, hemihydrate gypsum 19.6, quartz sand with fineness modulus 3 and moisture content of 1-3% 53.6-54.5, superplasticizer based on sodium salts of polymethylene naphthalene sulphonic acids "Polyplast СП-1" 0.07-0.08, setting and hardening time regulator "БЕСТ-ТБ" 0.05, metakaolin with hydraulic activity of not less than 1,200 mg/g, degree of grinding of not less than 2,000 m²/kg 1.0, diatomite with hydraulic activity of not less than 1,500 mg/g, degree of grinding of not less than 1,400 m²/kg 1.6, polysiloxane ether "MasterPel 793" 0.008–0.009, water – the rest.

EFFECT: reduced consumption of portland cement, increased stability of shape, resistance to penetration, ultimate bending strength of hardened composites printed on 3D printer, reduced average density of composites while ensuring their water resistance.

1 cl, 2 tbl