CRUDE MIXTURE BASED ON GYPSUM-CEMENT-POZZOLANIC BINDER FOR CONSTRUCTION 3D PRINTING 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. Crude mixture based on gypsum-cement-pozzolanic binder for construction 3D printing contains, wt.%: portland cement, containing, wt.%: tricalcium silicate 63.0, tricalcium aluminate 6.1, 5.59, hemihydrate gypsum 16.7, quartz sand with fineness modulus 3 and moisture content of 1–3% 54.7–55.8, superplasticiser based on lignosulphonates "MasterPozzolith MR 55" 0.06–0.07, setting and hardening time regulator – "БЕСТ-ТБ" 0.05, diatomite with hydraulic activity of not less than 1,500 mg/g, degree of grinding of not less than 1,400 m²/kg 5.59, 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