DRY MORTAR Russian patent published in 2019 - IPC C04B28/04 C04B14/10 C04B24/26 C04B22/08 C04B111/20 

FIELD: construction materials.

SUBSTANCE: invention relates to dry mortars for leveling surfaces of concrete products. Dry mortar comprises cement, clay, water, bone glue, slack lime, copper sulfate additionally contains polycarboxylate superplasticizer Melflux 2651F, polypropylene microfiber with a length of 6 mm, dispersed masonry sand with the largest grain size of not more than 0.63 mm in the following ratio of components, wt. %: portland cement – 21.0–25.0; bentonite clay – 6.0–10.0; bone glue – 1.5–2.0; slack lime – 5.5–7.5; copper sulphate – 0.5–1.0; superplasticizer – 0.65–0.79; polypropylene microfiber – 0.67–0.69; dispersed sand – 37.18–40.02; water – balance.

EFFECT: technical result is the increased tensile strength under bending, compressive strength, decreased water absorption and water absorption during capillary suction.

1 cl, 2 tbl