FIELD: materials industry.
SUBSTANCE: invention is related to the technology of building materials. Additive to cement, the mixture on its basis, contains (in terms of non-hydrated basis) wt.%:
reducer for hyperstoichiometric oxygen contained in the input to the cement phase 12CaO+7A2O3, hydration products in powder and water-soluble form as one or as a mixture, where one reducer has a standard electrode potential (SP) with above minus SP equal to minus 0.338B, 14-18, oxidant for an iron cation (II) as part of a conglomerate of the mixed crystals [m(2CaO·Fe2O3) + nCaO + pFeO] at the weight ratio of m:n:p (6 - 9): (2 - 4): (0.5 -1.5), or a crystalline phase of 9CaO Fe2O3 FeO, in powder and water-soluble form as one or a mixture, where one oxidant has an SP value higher than SP values equal to 0,771B, 5-20, particulate oxidation catalyst - substance or vapour mixture, from the group of silica gel, microsilica, tripoli, diatomaceous earth, metakaolin, flask, 20-35, hardening accelerator 2-12, plasticizer 18 - 30, with the content of additive in the amount of 0.5 - 3.5 wt.% of the ceramic part of cement. The method of producing the above mentioned additive by subsequent filling of a mixing and/or dispersing device with the specified reducer, oxidant, catalyst, accelerator and plasticizer, dispersing the resulting mixture till homogeneity. As for the other option, the method of producing the above mentioned additive by filling the mixing and/or dispersing device with these components, the specified reducer is pre-dispersed with the catalyst, in their mixture water-repellent agent is introduced, the hydrophobic mixture is introduced with these oxidants, the accelerator and plasticizer, each with an additional hydrophobisator portion, with the content of hydrophobizator in the additive as 0.02 - 0.16 wt.% of the ceramic part of cement, being dispersed till homogeneity. The invention has been developed in the Subclaims.
EFFECT: increased strength and durability of cementitious materials and cement-based products from underburned clinker.
21 cl, 2 ex, 3 tbl
