TWO-PHASE MIXTURE BASED ON CEMENT FOR COMPOSITES IN CONSTRUCTION 3D PRINTING TECHNOLOGY Russian patent published in 2020 - IPC C04B28/04 B33Y70/00 

FIELD: construction.

SUBSTANCE: invention relates to construction materials which are adapted to 3D construction printing modes. Invention includes a two-phase mixture based on cement for composites in construction 3D printing technology. Two-phase mixture contains two phases: solid (phase 1) - mixture of dry components and liquid (phase 2) - aqueous solution. Ratio of the two phases is 4.8–5:1. Phase 1 contains components, wt. %: portlandcement CEM I 42.5 H - 48.3–49.8, limestone flour with content of CaCO3 of not less than 95 % - 49.8–51.1, xanthan gum with content (C35H49O29) n is not less than 91 % - 0.1–0.15, tetrapotassium pyrophosphate with K4P2O5 content of not less than 98 % - 0.1–0.15, polypropylene fiber with length of 12 mm - 0.2–0.3. Phase 2 contains water and superplasticizer based on polycarboxylate esters. Weight ratio of components: water - 96.2–97.8 %, superplasticizer - 2.2–3.8 %.

EFFECT: technical result is increased plasticity, shape stability, compression strength, bending tensile strength, adhesion strength of composite layers.

1 cl, 1 tbl