MORTAR Russian patent published in 2009 - IPC C04B28/00 C04B24/24 C04B111/20 

FIELD: chemistry.

SUBSTANCE: invention relates to mortar composition and can be used in plaster work. The mortar, which contains cement, sand, an additive and water, also contains lime, finely ground limestone with specific surface area of 200 m²/kg. The sand used is perlite sand with particle size of 0.63 to 1.25 mm and construction sand with particle size of 0 to 0.63 mm. A complex additive is used, containing the following, wt %: magnesium sulphate - 26.9 to 44.4; superplasticizer C-3 - 11.2 to 26.9; Dairen 1400 - 44.4 to 46.2, with the following ratio of components of the mortar, wt %: cement - 14.99 to 18.87; lime - 3.77 to 4.50; finely ground limestone with specific surface area of 200 m²/kg - 7.54 to 9.0; sand with particle size of 0-0.63 mm - 45.18 to 46.33; perlite sand with particle size of 0.63 to 1.25 mm - 4.52 to 4.64; said complex additive - 3.39 to 3.44; water - 16.73 to 17.1.

EFFECT: increased bending strength and fracture strength, reduced shrinkage.

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