BINDER Russian patent published in 2018 - IPC C04B7/13 C04B14/14 C04B12/04 C04B22/08 C04B111/23 

FIELD: construction.

SUBSTANCE: invention relates to the building materials industry and can be used in the manufacture of acid-resistant concrete and mortar based on the unfired binder. Binder contains a reactive component, a hardening accelerator and an alkaline activator; according to the invention, kaolinite clay activated to a specific surface of 640 m²/kg is used as the reactive component and baked at a temperature of 600–650 °C, which is mixed with volcanic tuff, dried before grinding at a temperature of 105 °C for 2 hours and ground to a specific surface of 520 m²/kg in the presence of a sodium silicofluoride hardening accelerator and an alkaline activator based on sodium hydroxide and sodium liquid glass with a silicate module of 2.8 and a density of 1.24 g/cm³ at the following component ratio, wt. %: metakaolin 26.8–61.2, volcanic tuff 21.4–51.2, sodium silicofluoride Na₂SiF₆ 5.8–8.0, liquid glass Na₂SiO₃ 11.0–13.0, sodium hydroxide NaOH 0.6–1.0.

EFFECT: technical result is an increase in the effectiveness of acid-resistant binder due to the improvement of its physical and mechanical and operational properties.

1 cl, 1 tbl