METHOD OF PRODUCING CONCRETE ARTICLES Russian patent published in 2019 - IPC C04B41/50 

FIELD: construction.

SUBSTANCE: invention relates to production of construction materials and can be used to make concrete articles in civil and industrial construction, as well as for erection of special purpose. Method of producing concrete articles includes molding article, impregnating article at temperature of 20–30 °C with further hardening. First, impregnation is carried out in a solution of aluminum nitrate Al(NO₃)₃ with concentration C=3 % for 36 hours, and then – in solution of aluminum hydroxide sol Al(OH)₃ with concentration C=3 % for 36 hours.

EFFECT: high hardness of the manufactured concrete articles.

1 cl, 2 tbl, 3 ex