FIELD: construction.
SUBSTANCE: invention relates to the composition of concrete mixtures. Concrete mixture consisting of Portland cement, crushed stone or gravel, building sand, naphthalene-formaldehyde-based superplasticizer, water. The mixture additionally contains amorphous nanomodified silicon dioxide, nanomodified tripoli or flask, sodium nitrate, saponified wood resin or neutralized air-entraining resin in the following ratio, wt.%: Portland cement 7.2-10.5, crushed stone or gravel fraction 20-40 mm 50.0-56.0, building sand 34.0-26.0, naphthalene-formaldehyde-based superplasticizer 0.04-0.08, amorphous nanomodified silicon dioxide 0.01-0.07, nanomodified tripoli or flask 0.02-0.08, sodium nitrate 0.2-0.4, saponified wood resin or neutralized air-entraining resin 0.001-0.008, the rest is water.
EFFECT: obtaining concrete mixtures with a reduced degree of delamination of components, the ability to harden at ambient temperatures from +5°C to -15°C while maintaining compliance with regulatory requirements for mobility and workability.
1 cl, 6 ex
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