FIELD: construction.
SUBSTANCE: additive for modification of gypsum binders, construction mortars and concretes on their basis contains the following components, wt %: hydraulic binder 50-90, active mineral component 9.9, plasticising additive 2.1-5, at the same time active mineral component is used with parametres that satisfy the following requirements of additive - with specific surface of at least 1 m/g, with average size of particles of not more than 20 micrometre and hydraulic activity of CaO at the age of 28 days at the temperature of - 20°C in amount of at least 1 mg/g, besides production of additive is carried out at one stage by an ordinary mixing, and batching of additive is carried out in amount of 4.99-9.9% from mass of gypsum binder.
EFFECT: improved physical and mechanical properties of gypsum binders, construction mortars and concretes on their basis and simplification of production technology.
4 cl, 2 tbl, 3 ex
