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Information × Registration Number 0218U005003, 0115U000635 , R & D reports Title Determination of physicochemical bases for obtaining silicate composites with high hydrophysical characteristics. popup.stage_title Head Vandolovsky Alexander Georgievich, Registration Date 30-01-2018 Organization 3. Kharkov technikal university of construction and architecture popup.description2 It was established that the introduction of chemical additives in silicate mixtures (3.5% of cement mass) reduces the open capillary porosity of the composite to 1.28% (more than 5 times). It was found that the composition of the composite containing 0.2% of microfiber, 1.5% of pearlitic sand, 11% of finely dispersed calcium carbonate supplement and 3.5% of a mixture of chemical additives possessing the best hydrophysical characteristics, possesses a synthesis of additional crystalline hydrates that compact the structure at the microlevel . It is established that the penetration of the components of the developed waterproofing composition into the porous material is provided due to the diffusion of their ions through the water pores, and the depth of colmatation is determined by the length of the diffusion path in time, corresponding to the time of setting the waterproofing composition. For the developed composite on a silicate basis, the penetration depth and, accordingly, the colmatation of porous mineral bases (concrete, brick, stone, etc.), determined by calculation and confirmed experimentally by the addition of phosphor additives, amounted to 7-10 mm . A silicate composite mixture with enhanced hydrophysical characteristics on a cement base with compression and bending strengths of 41.1 MPa and 12.5 MPa, respectively, adhesion to a concrete base of more than 2.36 MPa, water resistance greater than W12, frost resistance greater than F200, shrinkage deformation in 6 months 0, 07%, which is several times higher than the requirements of normative documents for similar warehouses (warehouses of penetrating action on cement basis): The dependence of the hydrophysical characteristics of cement composites on the electrical properties of their structural components has been established, in particular, it has been established that the increase in water impermeability is ensured by the synthesis of additional hydrate crystals - hydrocarbon aluminates, hydronitroaluminates of calcium hydrochloraluminates, as well as calcite having a positive surface charge, on the surfaces of pores, capillaries, fibers that have a negative surface potential; Regularities in the formation of current crystals on the surfaces of pores, capillaries, fibers, taking into account their electrically conductive characteristics, are established, in particular, it is established that crystal-like shapes form contacts with them, which provide high strength, density, and impermeability. The introduction of the developed composite material is possible on the existing capacities of the enterprises for the production of construction mixtures Product Description popup.authors Григоренко Олена Анатоліївна Деденьова Олена Борисівна Казімагомедов Ібрагім Емірович Костюк Тетяна Олександрівна Лобанова Анастасія Валеріївна Плахотніков Кирило Валерієвич popup.nrat_date 2020-04-02 Close