FIELD: chemistry.
SUBSTANCE: invention relates to composition of a complex additive for concrete and mortar. The complex antifreeze additive for concrete and mortar contains an organic component, potassium carbonate and sodium carbonate, the organic component being a mixture of hydroquinone, pyrocatechol and resorcinol in ratio of (0.4-0.62):(6.51-8.19):(0.4-0.98) and additionally sodium sulphate, sodium sulphite, a mixture of thiocyanate and sodium thiosulphate, sodium sulphide, sodium nitrite and water, with the following ratio of components, wt %: mixture of hydroquinone, pyrocatechol and resorcinol 0.04-1.87; potassium carbonate 3.74-4.34; sodium carbonate 1.62-2.17; sodium sulphate 0.5-10.3; sodium sulphite 0.14-1.83; mixture of thiocyanate and sodium thiosulphate 15.4-27.2; sodium sulphide 0.03-0.06; sodium nitrite 20.2-39.1; water - the balance up to 100%. The invention is developed in subclaims.
EFFECT: high antifreeze effect of the additive while maintaining 28-day compression strength with normal hardening.
2 cl, 2 tbl
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