EXPANDING LOW-DENSITY PLUGGING MATERIAL Russian patent published in 2002 - IPC

FIELD: compositions of expanding plugging materials. SUBSTANCE: expanding low-density plugging material has the following ratio of components, mas. pts: portland cement, 100; expanding additive, 5-7; commercial lignosulfonates, 0.01-0.25; triethanolamine, 0.01-0.06; neutralized air-entraining resin, 0.005-0.1; gypsum, 0-6. Expanding plugging material may contain expanding additive in the form of at least one component from group including alumina cement, alumocalcium slag, calcium sulfoaluminates, calcium sulfoferrites. EFFECT: increased sedimentation stability, adhesive and bending strength. 2 cl, 2 tbl