FIELD: construction materials.
SUBSTANCE: invention relates to the industry of construction materials and can be used for making construction articles and structures in the technology of additive manufacturing by layer-by-layer extrusion (3D printing) of a crude mixture. Gypsum-cement-pozzolanic crude mixture for extrusion on 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, superplasticiser based on sodium naphthalene sulphonate "MasterRheobuild 183" 0.06–0.07, setting and hardening time regulator "BEST-TB" 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, methylsilanthriol potassium salt "GKZh-11K" 0.006-0.007, 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
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Authors
Dates
2024-06-17—Published
2023-12-29—Filed