WATER ABSORPTION AND FROST RESISTANCE OF A CEMENT STONE ON THE BASIS OF DRY MIXES

Currently, dry mix mortar play a big role in the development of the world market of building materials. The industry of building materials in Ukraine is quite young: the first dry mix mortar appeared on the market at the end of the Soviet Union in 1980s. The dry mix mortar has stable properties, their use contributes to the quality of construction work. This rate compares favorably with the dry mixture to the traditional solutions used in construction. The structure of consumption of dry mix mortars in the domestic market accounted for the main share of glue and plaster mixture. The use of other compounds, in particular mixtures for leveling floors, has no significant volumes and often the reason for this - the lack of design solutions and the low level of training workers. There are companies that produce dry mixtures for various purposes in Ukraine. The greatest volume of production accounted for dry mix mortars based on commercially available Portland cement 400 or 500, which leads to a waste of the binder, and in combination with expensive chemical additives imported production - to a substantial rise in the cost of. However, the raw material base of most regions of the country has sufficient stocks of local materials and industrial products for production of dry mix mortars. Introduction of waste products as a separate component of the mix is one of the essential reserves of increase of efficiency of the cement compositions of the cost and consumption of cement and construction and improvement of their technical properties. As industrial wastes were considered: wet gas cleaning sludge from the production of ferrosilicon, sludge water softening Kharkov CHP-5 and gravels dust Kharkov plant of expanded clay. Using a dry mortar slurry wet scrubbing promotes formation of a dense material structure, whereby in addition to increasing the strength characteristics of reduced permeability, increased frost resistance, abrasion resistance and erosion, as well as stability of the material to different types of corrosion, which ultimately determines its durability. Adding mineral modifier slurry water softening Kharkov CHP-5 increases the porosity of the stone, with a decrease in the size of the capillary pores and increase their homogeneity. As a result, facilitate the binding stone reduced the probability failure of layers based on them under its own weight, which is important in finishing, as well as improved thermal and acoustic performance. Addition of gravels dust to the dry mix mortar increases the plasticity of the mix facilitates the spray mixture on the coated surface and solves the problem of disposal waste. The use of these wastes should help improve the environmental and economic performance as the construction industry and construction. The article provides the results of studies carried out on cubes with edges 7,7 sm. The authors put forward a hypothesis about the nature of the interaction microfillers with astringent.