PROPPING COMPOSITION FOR SUBSIDENCE SOIL Russian patent published in 2018 - IPC C09K17/00 E01C21/00 E02D3/12 

FIELD: construction.

SUBSTANCE: invention relates to construction and can be used for the construction of bases and coatings of highways, as well as for fixing the soil of the foundations of buildings and structures. Composition is described for fixing subsidence soils comprising Portland cement CEM I 42.5 N, a filler and chemical modifier in which a mixture of quartz sand, volcanic tuff and limestone is used as a filler, and as a chemical modifier, polycarboxylate dry superplasticizer is used with the following ratio, mass%: Portland cement CEM I 42.5 N – 22–38; volcanic tuff – 25–33; limestone – 6–10; quartz sand – 29–39; superplasticizer polycarboxylate dry – 0.2, the mixture is subjected to mechanochemical activation with grinding of the ingredients in the mill to a specific surface of 470–520 m²/kg.

EFFECT: technical result is the composition for fixing the subsidence soil, which due to reduced water absorption has the best characteristics of frost resistance, high material durability and extended service life.

1 cl, 4 tbl