PLUGGING AND INJECTION WATERPROOFING MATERIAL FOR CEMENTING OPERATIONS IN UNDERGROUND FORMATIONS Russian patent published in 2022 - IPC C09K8/42 C09K8/467 C04B28/04 

FIELD: fast-setting modified grouting mixtures.

SUBSTANCE: invention relates to fast-setting modified grouting mixtures on a cement binder for the rapid fixing of unstable rock masses, plugging wells and stopping water inflows in rock masses and building structures for general construction, hydraulic engineering purposes, enclosing structures of various types using drilling injection technologies. Plugging-injection waterproofing material for cementing operations in underground formations includes components in the following ratio, wt.%: the specified Portland cement 75-85.13; anhydride G5 B-2 5-10; hyperplasticizer RS 1701 0.1-0.18; tartaric acid 0.01-0.06; cellulose ether P100 0.06-0.15; aluminum powder 0.01-0.1; calcium chloride 0.5-2.0; bentonite powder 1-5; water repellent 0.08-0.15; aluminous cement 8-10; soda ash 0.1-0.5; aluminum powder 0.01-0.1.

EFFECT: obtaining a quickly losing mobility and fast-hardening mixture, which has high resistance to the aggressive effects of groundwater, resistance to erosion, chemical aggression, and has waterproofing properties.

1 cl