IPC classes for russian patent Crude mixture for making light aggregate. RU patent 2520257. (RU 2520257):
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Invention relates to methods of preparing dry construction mixtures and can be used in construction engineering. The method of preparing the antiseptic additive for a dry construction mixture involves passing direct current through electrodes immersed in water, obtaining a silver colloidal solution, feeding lime into a mixing device before mixing, batching lime into the silver colloidal solution, drying the obtained lime paste which is rich in colloidal silver, grinding the obtained dry mass, sieving the obtained ground mass, finishing mixing, packing into a prepared waterproof packaging for further application. Components are in the following ratio in wt %: lime 60%; silver colloidal solution with silver concentration of 70-75 mg/l 40%. The antiseptic additive for the dry construction mixture is dry, fine powder with specific surface area less than 5000-7000 cm2/g, rich in colloidal silver with particle size 0.005-0.015 micrometres. |
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FIELD: chemistry.
SUBSTANCE: crude mixture contains the following components, wt %: dust from gas cleaning in ferroalloy manufacturing 63.6-65.6; aqueous sodium hydroxide solution (concentration of 50%) 21.3; liquid glass 10.6; flue ash 2.3-4.3; saponified tall oil fatty acids 0.2.
EFFECT: high frost resistance and low water absorption of the aggregate.
2 tbl
The invention relates to the production of building materials, in particular to the manufacture of lightweight aggregates.
Closest to offer the raw mix for technical result and effect is achieved is raw mixture comprising (wt.%): microsilica 51,2...52,5, aqueous solution of sodium hydroxide 42,2, ash...6,3 5,3 [RF Patent №2214977, 04 In 18/04, 14/04].
The disadvantage of this mixture is relatively low frost resistance and high water absorption placeholder.
The technical result - increase frost resistance and reduced water absorption placeholder.
This technical result is achieved by the feed mixture contains as siliceous component of the dust-gas purification of Ferroalloy production (PHPP), as fluid mixing contains a mixture of liquid glass, acid tall oil fatty saponified (CITO) and aqueous solution of sodium hydroxide in the following components ratio (mass%): PGPF
63,6 65,6...
aqueous solution of sodium hydroxide (concentration 50%) 21,3
liquid glass 10,6 ash
2,3...4,3 KITO 0,2
PGPF is ultradisperse waste Bratsk ferroalloys plant with a specific surface area of 25 to 34 m/y 3 . PGPF deposited in bag filters of system of gas purification of Ferroalloy plant. Chemical composition PGPF,% Mas.: SiO 2 - br70.63; 2 - 3,25; MgO - 2,44; Fe 2 O 3 - 1,76; Na 2 O - 1,15; Al 2 O 3 - 1,09; CaO - 0,54; SPT - is 11.39.
Liquid glass - alkaline water solution of sodium silicates, thick liquid odourless (GOST 13078-81).
The fly ash from the combustion of brown coal from the Irsha-Borodino deposits Kansko-Achinsk coal basin - dispersed waste consisting of spherical particles with a diameter from a fraction of microns to a few microns. The chemical composition of fly ash, wt%: SiO 2 - 46,8; CaO - 25,8; Fe 2 O 3 - 7,9; Al 2 O 3 - 12,9; MgO - 5,0; Na 2 O - 0,5; K 2 O - 0,5; SO 3 - 0,1; SPT - 0,5.
KETO are formed by processing of coniferous wood for the pulp and paper industry (Branch of OJSC "Ilim Group" in Bratsk area CPU-2) and are water-soluble jelly product of yellow color with different shades, consisting of sodium salts of natural vegetable fats faction C16-C22 (TU 13-7308058-15-90).
Molded raw pellets, softening during the heat treatment, reach bioplasticheskikh state. Swelling occurs due to gas-tight surface of the shell with simultaneous internal providential result from the burning of organic substances contained in PGPF, ash ash, KITO and dehydration of calcium hydro and sodium. The latter are formed in the source of the raw mix for interaction fly ash and alkaline components. Crystalline products of thermal destruction of the raw mix at heat treatment microarray walls of the pores. Example
The production of the material is as follows. Dry and dispersive components of the mixture are shuffled and wetted by liquid mixture is obtained from a mixture of liquid glass, KITO and aqueous solution of sodium hydroxide. From the received molded plastic mass of granules in diameter not less than 10 mm Raw pellets fired at a temperature of 300 OC for 20 minutes.
Compounds of raw mixes and physical-technical characteristics of the placeholder is given in table. 1 and 2. Table 1
Components
The contents of the ingredients in the composition (wt.%) 1 2 3 Ash 63,6 64,6 65,6
Liquid glass 4,3 3,3 2,3
Aqueous solution of sodium hydroxide (concentration 50%) 10,6 10,6 10,6 21,3 21,3 21,3 KITO 0,2 0,2 0,2 Table 2
Components
Composition
Known composition 1 2 3
Bulk density, kg/cm 3 234 246 253 145-156
Frost resistance, cycle 25 35 25 15
Water absorption,% by weight 91,5 87,8 79,6 203,3
Raw mix to make lightweight aggregate that includes siliceous component fluid mixing and Supplement fly ash, notable as the siliceous component uses the dust-gas purification of Ferroalloy production (PHPP), and as a liquid mixing uses a mixture of liquid glass, acid tall oil fatty saponified (CITO) and aqueous solution of sodium hydroxide in the following ratio of components, mass%: PGPF
63,6 65,6...
aqueous solution of sodium hydroxide (concentration 50%) 21,3
liquid glass 10,6 ash
2,3...4,3 KITO 0,2
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