FIELD: technological processes.
SUBSTANCE: present invention relates to a polymer-cement dry construction mixture for 3D printing, comprising portland cement, polymer binder, sand, fiber glass and modifier, wherein polymer binder used is redispersible polymer powder of polyvinyl acetate or copolymers of polyvinyl acetate, sand is used with grain diameter up to 5 mm, fibrous fiber is used as fibrous fiber with dimensions l×d = 6 ÷ 12 × 0.005÷0.05 mm, modifier is a powdered floroglyucinfurfural modifier in the following ratio, wt% portland cement - 27.45-32.55, redispersible polymer powder - 1.63-2.75, sand - 65.10-68.60, fiber glass - 0.65-1.12, powder modifier - 0.07-0.15. Invention is developed in dependent claims.
EFFECT: providing high thixotropic properties, fast structure formation and high plastic strength at rest, high adhesion between layers, low loss of water from exposed surfaces of hardening material and low shrinkage deformations.
5 cl, 2 tbl
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