LIGHT-WEIGHT GROUTING MIXTURE Russian patent published in 2012 - IPC C09K8/473 

FIELD: oil and gas industry.

SUBSTANCE: light-weight grouting mixture includes the following component ratio, wt %: grouting Portland cement 51.50-64.54, condensed microsilica MK-85 21.52-34.34, calcium chloride 10.30-10.33, superplasticising agent - polyplast CP-1 2.57-2.58, natrosol 250 EXR 1.03-1.29.

EFFECT: improving insulating capability of light-weight grouting mixture due to reduced water loss, maintaining solution density at increased pressures; increasing the adhesion strength of stone to column and stone water impermeability.

1 ex, 1 tbl