LIGHT-WEIGHT GROUTING MORTAR Russian patent published in 2004 - IPC

FIELD: oil and gas production.

SUBSTANCE: mortar contains Portland cement and tempering fluid prepared by adding water to additive prepared by dissolving aluminosilicate, in particular nepheline concentrate, in 3-20% hydrochloric acid solution, amount of additive constituting 3 to 30% of the weight Portland cement and water/cement ratio being 0.5-1.0. Thus obtained nepheline sol is treated with 5-10% lime milk until pH of mortar achieved 4.5-5.5.

EFFECT: reduced density of grouting mortar, increased strength of cement stone, and improved workability of additive.

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