STABILIZED HARDENING AND SETTING ACCELERATOR FOR HYDRAULIC BINDERS Russian patent published in 2019 - IPC C04B40/00 C04B28/02 

FIELD: chemistry.

SUBSTANCE: group of inventions relates to a hardening and setting accelerator for hydraulic binder, to a method for accelerating hardening and setting of hydraulic binder and to use of said hardening accelerator and setting in hydraulic binder, more specifically in shotcrete or in construction shot mixture. Present invention also relates to a mixture which contains a binder which contains said hardening and setting accelerator, as well as to a cured molded article made therefrom. Accelerator comprises aluminium sulphate, aluminium hydroxysulphate, sulphuric acid, aluminium hydroxide and / or aluminium hydroxycarbonate and at least two chemically different organic acids, each of which contains at least one hydroxyl group, as well as at least one acid group. Total content of said at least two organic acids is 1 wt. % of the total weight of the accelerator. According to the method, the mixture containing hydraulic binder is mixed with said hardening and setting accelerator in amount of 0.1–15 wt. % of hydraulic binder weight.

EFFECT: technical result is providing high stability and strength of binding materials.

15 cl, 2 tbl