FIELD: machine building.
SUBSTANCE: invention relates to various application structures underground waterproofing, namely during creation of underground volumetric membrane. Set task is solved by backfill composition, containing, wt%: 15–25 of copolymer non-plasticized acrylic emulsion based on styrene and methacrylic esters, 4–15 of carboxylic acids copolymer of acrylic row, their esters and salts and 64–70 of fine mineral additives.
EFFECT: technical result is increase in buried structures water-proofing quality, which are under effect of hydrodynamic loads in wide range of depths, while ensuring ecological safety of works, excluding insulating material negative influence on ambient environment.
1 cl, 1 tbl
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