METHOD OF PREPARING BINDER, CONCRETE OF MORTAR MIX Russian patent published in 1997 - IPC

FIELD: building industry, more particularly preparation of mortars with modifying additives. SUBSTANCE: claimed method of preparing binder, concrete or dissolved mortar mix comprises introducing hydrolyzed polyacrylonitrile additive in the form of aqueous 0.5-1.5 concentration solution during grinding operation or additive during mixing with mineral components of concrete or soluble mortar in the form of aqueous 0-0.1 % concentration solution, the amount of additive constituting 0.001-0.003 % by dry matter based on the amount of cement. Saponified polyacrylonitrile includes partially saponified polyacrylinitrites. Plasticity of concrete mix with one of said additives is not greater than 5 cm, and strength of concrete after 28 days is 29.5 MPa. EFFECT: more efficient preparation method. 1 tbl