MORTAR Russian patent published in 2009 - IPC C04B28/04 C04B111/20 C04B111/27 

FIELD: construction.

SUBSTANCE: mortar including cement, sand, additive and water consists of sand having maximum fraction size 0.315 mm, composite chemical additive containing, superplasticising agent Peramin-SRA, cellulose ether at 1% viscosity of solution at 20°C=7000 MPa/sec, expanding additive fro cement Denka CSA and Sodium fluoride at the following ratio of components, wt %: superplasticising agent Peramin-SRA -17.65-18.65; cellulose ether 1% viscous solution at 20°C=1000 MPa/sec - 11.06-11.76; expanding additive Denka CSA - 58.40-58.82; sodium fluoride - 11.29-11.77. In addition, mortar contains dolomite limestone with maximum size of fractions 160 mcm at the following ratio of components, wt %: Portland cement - 29.17-33.3; sand with maximum size of fractions 0.315 mm - 37.05-40.15; dolomite limestone with maximum size of fractions 160 mcm - 11.7-12.5; the above mentioned composite additive - 1.45-1.48; water - 16.5-16.7.

EFFECT: increased strength at compression and water tightness.

1 tbl, 1 ex