GROUTING MORTAR Russian patent published in 2018 - IPC E21B33/138 C09K8/42 

FIELD: mining; oil and gas production industry.

SUBSTANCE: invention relates to mining and oil and gas production industry and can be used in development of mineral deposits by underground method and repair and insulation works in tunnels, oil and gas wells. Grouting solution contains 48–50 wt % of converter slag, 33–35 wt % of electric steel-smelting slag, 9–11 wt % of burned rock of mine dumps and slurry of spent electrolytes of acid batteries – the rest. Converter slag has the following composition, wt %: SiO₂ 35.43; Al₂O₃ 8.51; Fe₂O₃ 1.94; FeO 2.83; MnO 1.15; CaO 29.97 (including CaO_free 0.39); MgO 20.69; SO₃ 0.04; P₂O₅ 0.14, and electric steel-smelting slag has the following composition, wt %: SiO₂ 26.63; Al₂O₃ 5.33; FeO 0.95; MnO 0.37; CaO 55.55 (including CaO_free 0,71); MgO 9.68; S 1.41; P₂O₅ 0.03; Cr₂O₃ 0.05.

EFFECT: technical result is wider nomenclature of cementless grouting mortars with increased durability of cement.

1 cl, 3 tbl