System of inorganic binding substance for obtaining chemically stable building chemical products

FIELD: chemistry.

SUBSTANCE: invention relates to inorganic binding agents. System of inorganic binding agent includes, wt.p.: 10-30 of at least one latent hydraulic binding substance, selected from blast furnace slag, slag sand, milled slag, electrothermal phosphorus slag and metal-containing slag, 5-22 of at least one amorphous silicon dioxide, selected from precipitated silicon dioxide, pyrogenic silicon dioxide, microsilica and glass powder, 0-15 of at least one reactionable filler, selected from brown coal fly ash, mineral coal fly ash, metakaolin, volcanic ash, tuff, trass, pozzolan and zeolites, and 3-20 of at least one alkali metal silicate, and in which content of CaO is 12-25 wt %, setting requires 10-50 wt.p., latent hydraulic binding substance, amorphous silicon dioxide and optional said filler is present as first component and alkali metal silicate and water - as second component. System can be applied for obtaining hydraulically setting mortar.

EFFECT: increased resistance to action of acid, water and alkali.

6 cl, 3 tbl

 

The present invention relates to a new system of inorganic binders, the use of this system binder to obtain a hydraulically setting mortar and the mortar that holds this system binder.

Portland cement was first mentioned in British patent BP 5022 and since then has continuously further developed. Modern Portland cement contains about 70 wt.% CaO+MgO, about 20 wt.% SiO2and about 10 wt.% Al2O3+Fe2O3. Because of its high content of CaO, he is cured hydraulically. The cured Portland cement is resistant to alkalis, but is not resistant to acid.

As latent hydraulic binders, certain slags from metallurgical processes can be activated strongly alkaline metals, such as, for example, liquid glass, or can be applied as gomesiana matter to Portland cement. By mixing with fillers (quartz sand or unit having appropriate particle size and additives, they can be used as mortar or concrete. Blast furnace slag, a characteristic latent hydraulic binder, is usually 30-45 wt.% CaO, about 4-17 wt.% MgO, about 30-45 wt.% SiO2and about 5-15 m is S.% Al 2O3, characterized by about 40 wt.% CaO, about 10 wt.% MgO, about 35 wt.% SiO2and about 12 wt.% Al2O3. Caulk products generally have the properties of hydraulically hardened systems.

System inorganic binders based on reactive water-insoluble oxides, based on SiO2in combination with Al2O3that utverjdayut in aqueous alkaline medium, mostly known. Such systems binders are also referred to as geopolymer and described, for example, in US 4,349,386, WO 85/03699 and US 4,472,199. Such systems have typically 50-60 wt.% SiO2, 20-25 wt.% Al2O3not contain CaO and 15 to 30 wt.% M2O (M=Na, K).

Metakaolin, slag, fly ash, activated clay, or a mixture thereof can be used as a reactive mixture of oxides. Alkaline environment in order to activate the binder, usually consists of aqueous solutions of carbonates of alkali metals, fluorides of alkali metals, hydroxides of alkaline metals and/or soluble solution of liquid glass. Cured binders have a high mechanical stability. In comparison with cement, they can be more economical and more persistent and may have a more favorable balance of emissions of CO2. Such systems are usually more able to be resistant to acidic is you and less able to be resistant to the action of alkali.

WO 08/012438 describes additional cement geopolymer based on the class F fly ash low CaO content, the blast furnace slag and an aqueous alkali metal silicate having a ratio of SiO2:M2O more than 1.28, preferably greater than 1.45. In the examples, calculated on the basis of the anhydrous oxides, are about 45-50 wt.% SiO2about 20-26% by weight Al2O3about 9-10 wt.% CaO and about 3-4 wt.% K2O.

The inventors have adopted the object substantially around at least some of the shortcomings of the prior art discussed above. In particular, the object of the invention was to provide a system of inorganic binders, which, in the cured state, has high mechanical strength and is resistant to water, resistant to acid and resistant to alkali. In particular, the cured system should have these properties even at a relatively early stage, especially after only 7 days, and must be cured even at room temperature, preferably at as low as 10°C.

EP 1236702 describes containing liquid glass building material mixture for the production of mortar resistant to chemicals and is based on a latent hydraulic binder substance, liquid glass and metal salt as Agen is and control. Slag sand can also be used as a latent hydraulic component. Alkali metal salts, particularly lithium salts, referred to and used as a metal salt.

EP 1081114 describes the building material mixture for the production of mortar resistant to chemicals, building material mixture contains a powder of liquid glass and at least one hardener liquid glass. In addition, there are more than 10 wt.%, at least one latent hydraulic binder, and a mix of building material has at least one inorganic filler.

In EP 0457516 described heat-resistant, waterproof, resistant to the action of an acid binding agent comprising alkali metal silicates, metal oxides and metal carbonates, and need not, among other things, the microsilica. In these systems, the metal oxides are used as seals accelerators.

The above object is achieved by the features of independent claims. The dependent claims relate to preferred options for implementation.

It has been unexpectedly found that the system of inorganic binders according to the invention cures in the form of a hybrid matrix, which is resistant to the action of acid, resistant to de the action of water and resistant to the action of alkali.

The present invention provides a system inorganic binder, which contains at least one latent hydraulic binder, at least one of amorphous silicon dioxide, optionally, at least one reactive filler and at least one alkali metal silicate.

System inorganic binders of the invention preferably comprises 10-30 wt. parts latent hydraulic binders, 5-22 wt. parts of amorphous silica, 0-15 wt. parts of the reactive filler and 3-20 wt. parts of silicate of an alkali metal.

More preferably, it comprises 10-30 wt. parts latent hydraulic binders, 5-20 wt. parts of amorphous silica, 0-15 wt. parts of the reactive filler and 3-20 wt. parts of silicate of an alkali metal.

Particularly preferably, it comprises 15-25 wt. parts latent hydraulic binders, 5-17 wt. parts of amorphous silica, 0-10 wt. parts of the reactive filler and 4-15 wt. parts of silicate of an alkali metal.

In the context of the present invention, a latent hydraulic binder preferably should be understood as meaning a binder, in which the molar ratio of (CaO+MgO)SiO 2is between 0.8 and 2.5, and particularly preferably between 1.0 and 2.0. In particular, latent hydraulic binder selected from blast furnace slag, slag sand, ground slag, electrothermal phosphorus slag and metal-containing slag.

Blast furnace slag is a waste of blast furnace process. Slag sand is a granulated blast furnace slag, and ground slag is finely sprayed blast furnace slag. Ground slag varies according to its fineness of grinding and particle size distribution according to the origin and form of receipt, the fineness of the grind has an effect on reaction ability. As specifications for fineness of grinding is applied to the so-called value of blaine, which typically is of the order of magnitude of 200 to 1,000, preferably between 300 and 500 m2kg-1. Typical composition of blast furnace slag was mentioned earlier in this document.

Electrothermal phosphorus slag is a waste electrothermal production of phosphorus. It is less reactive than blast furnace slag and contains about 45-50 wt.% CaO, about 0.5-3 wt.% MgO, about 38 to 43 wt.% SiO2about 2-5 wt.% Al2O3and about 0.2-3 wt.% Fe2O3along with fluoride and phosphate. Metal-containing slag is a waste of various steel-making processes with strongly varying to what noticia (e.g., Caijun Shi, Pavel V. Krivenko, Delia Roy, Alkali-Activated Cements and Concretes, Taylor & Francis, London & New York, 2006, pp. 42-51).

Amorphous silicon dioxide preferably is an x-ray amorphous silica, i.e. silicon dioxide, which shows no crystallinity in the powder diffraction method. In particular, it is selected from precipitated silica, fumed silica and silica fume, as well as glass powder, which should also be considered as amorphous silicon dioxide in the context of this invention.

Amorphous silicon dioxide according to the invention accordingly has the content of SiO2at least 80 wt.%, preferably at least 90 wt.%. Precipitated silicon dioxide receive industrially by the processes of deposition, starting with a solution of liquid glass. Precipitated silica is also referred to as gel silicon dioxide, depending on the production process. Pyrogenic silica is produced by reaction of CHLOROSILANES, such as, for example, silicon tetrachloride, Ogorodnikova flame. Fumed silica is an amorphous powder, SiO2having a particle diameter of 5 to 50 nm and a specific surface area of 50-600 m2g-1.

Microsilica (also referred to as fine silica powder) represents a side is the product of the production of oxide silicon or ferrosilicon and also includes for the most part amorphous powder SiO 2. The particles have diameters of the order of magnitude of 0.1 μm. Specific surface area is of the order of magnitude of 20-25 m2g-1(e.g., Caijun Shi, Pavel V. Krivenko, Delia Roy, Alkali-Activated Cements and Concretes, Taylor & Francis, London & New York, 2006, pp. 60-61). In contrast, commercially available quartz sand is crystalline, has a relatively large particles and relatively small specific surface area. It serves according to the invention only as an inert aggregate.

Reactive filler is an optional component. Appropriately it is a substance having pozzolanic activity. Test for pozzolanic activity can be carried out according to DIN EN 196 part 5. A brief overview of puzzolana suitable according to the invention can be found in Caijun Shi, Pavel V. Krivenko, Delia Roy, Alkali-Activated Cements and Concretes, Taylor & Francis, London & New York, 2006, pp. 51-60, and pages 61-63. Preferably, the reactive filler is selected from lignite fly ash, mineralogies fly ash, metakaolin, volcanic ash, tuff, track, pozzolan and zeolites. Metakaolin and fly ash class C (coal fly ash) and F (mineralogia fly ash) are particularly preferred.

Metakaolin is formed by the dehydration of kaolin. Meanwhile as kaolin releases the physical image of the m bound water at 100-200°C, degidroksilirovanie passes at 500-800°C With the destruction of the molecular lattice and the formation of metakaolin (Al2Si2O7). Pure metakaolin respectively contains about 54 wt.% SiO2and about 46 wt.% Al2O3. Fly ash is formed, inter alia, by the combustion of coal in power plants. According to WO 08/012438, fly ash class C contains about 10 wt.% CaO, whereas fly ash class F contains less than 8 wt.%, preferably less than 4 wt.% and it is characteristic about 2 wt.% CaO. The teaching of WO 08/012438, therefore, incorporated by reference in this volume.

When establishing a suitable hybrid matrix, in particular an important raw material selection and its massive proportions. Under suitable system of inorganic binders according to the invention has, as a rule, the following oxide composition, calculated on the basis of solid components:

30-70 wt.% SiO2,

2-30 wt.% Al2O3,

5-30 wt.% CaO, and

5-30 wt.% M2O,

preferably:

30-65%, particularly preferably 45 to 60 wt.% SiO2,

5-30%, particularly preferably 5-15 wt.% Al2O3,

5-30%, particularly preferably 12-28 wt.% CaO, and

5-30%, particularly preferably 5-20 wt.% M2O.

The best results are obtained with 12-25 wt.% CaO.

The amount of water required for grasping, 10-50 eligible the speakers. parts, preferably 20-40 wt. parts, calculated on the total weight of (anhydrous) system inorganic binder. The amount of water required for grasping, therefore, not calculated in the form of a system component inorganic binder.

The silicate of an alkali metal selected from compounds having the empirical formula m SiO2·n M2O, in which M represents Li, Na, K or NH4or their mixture, preferably Na or K.

The molar ratio of m:n is eligible for not more than 3.6, preferably not more than 3.0, and in particular not more than 2.0. Even more preferably it is not more than 1.70, and in particular not more than 1.20.

The alkali metal silicate preferably is a liquid glass, particularly preferably a solution of liquid glass and in particular sodium or potassium water glass. Despite this, lithium or ammonium silicate mixture of solid and liquid glass can also be applied. In the case of solution of liquid glass, the above wt. part calculated in terms of solid components of this liquid glass, which typically amount to 20 wt.%-60 wt.%, preferably 30-50 wt.%, solid substances.

The above m:n relationship (also called a module) should preferably not be exceeded, as otherwise the ball is above cannot be expected full activation of components. Can also be used to significantly lower modules, such as, for example, approximately 0.2. Liquid glass having the above modules has to be adjusted with a suitable aqueous solution of alkali metal hydroxide. Potassium liquid glass commercially available, mainly in the form of aqueous solutions under suitable range of the module, at the same time, it is highly hygroscopic; sodium silicate commercially available in the form of a solid substance in a suitable range of the module.

If the alkali metal silicate or water glass are solid, the system inorganic binders suitable can be formulated as one-component system, which then can be light-cured addition of water. In this case, a latent hydraulic binder, amorphous silicon dioxide, additional reactive filler and a silicate of an alkali metal are present together as one component.

However, liquid glass can also be used in the form of an aqueous solution. In this case, the system inorganic binders suitable formulated as a two-component system in which usually latent hydraulic binder, amorphous silicon dioxide and additional reactive filler is present as p is pout component and the solution of liquid glass, which contains at least the amount of water required for grasping, is present as the second. At least in the case of potassium liquid glass, this option is preferred.

Inert fillers and/or additional additives may also be present in the system inorganic binders according to the invention. These additional components can alternatively also be added in the preparation of mortar or concrete.

Preferably, between 0 and 80 wt.%, especially preferably between 30 and 70 wt.%, inert fillers and/or between 0 and 15 wt.% additives may be present or may be added during the preparation of mortar or concrete. These mass data recalculated on the total weight of the solid components (anhydrous) system inorganic binder. Inert fillers and/or additional additives are therefore not calculated in the form of system components inorganic binder.

Well-known gravel, sand and/or powders, for example, on the basis of quartz, limestone, barite or clay, in particular quartz sand, suitable as inert fillers. Can also be used for light fillers, such as perlite, kieselguhr (diatomaceous earth), layered mica (vermiculite) and spenny sand.

Suitable additives are, for example, is mostly known additives for improving the fluidity, antifoams, moisture absorption agents, plasticizers, pigments, fibers, dispersion powders, wetting agents, agents that slow reaction accelerators, complexes agents, water dispersion and rheology modifiers.

Also, there may be a cement or it can be added during the preparation of mortar or concrete as an additional (hydraulic) supplements. Part of the cement is preferably not more than 20%, preferably not more than 10 wt.%, in terms of the total weight of the solid components (anhydrous) system inorganic binder. This cement may preferably be Portland cement and/or high-alumina cement.

The present invention also provides the use of systems of the inorganic binder of the invention, as such or as a component of compositions for construction materials and/or construction products such as concrete, completed part of concrete, concrete products, concrete blocks, as well as local concrete, shotcrete, concrete factory preparation, construction adhesives and adhesives for thermal insulation composite systems, concrete repair systems, one-component and ducommon ntie sealing cement mortars, templates for levelling concrete, mortar, plaster, and self-leveling compositions, mastic for bonding ceramic tiles, plaster and plaster coatings, adhesives and sealants, coatings, in particular for tunnels, wastewater lines, protecting spray and condensate, dry mortar, liquid mortar for sealing joints, drainage mortars and/or mortars for repair.

For this purpose, the system of inorganic binders of the invention are often mixed with additional components such as fillers, hydraulic substances and additives. Adding alkali metal silicate in powder form is preferably carried out before mentioned components are mixed with water. Alternatively, an aqueous solution of alkali metal silicate may be added to the other powder components.

The present invention also provides a mortar, especially dry mortar or liquid mortar jointing, which includes an inorganic binder of the invention.

After hardening, curing for seven days and subsequent storage for three days in acid, base and/or water, this mortar has firmly is to be compressed more than 15 H mm -2preferably more than 20 N mm-2and in particular more than 25 N mm-2as determined according to DIN EN 13888.

The present invention is now illustrated in more detail with reference to the following examples:

Examples

Raw materials:

- Metakaolin containing about 56 wt.% SiO2, 41 wt.% Al2O3and in each case <1 wt.% CaO and alkali metal oxide; specific surface area by BET method>10000 m2kg-1;

- Fume, containing >90 wt.% SiO2and in each case <1 wt.% Al2O3, CaO and alkali metal oxide; specific surface area by BET method >15000 m2kg-1;

- Crushed blast furnace slag containing about 34 wt.% SiO2, 12 wt.% Al2O3, 43 wt.% CaO and <1 wt.% oxide of an alkali metal;

The fineness of blaine >380 m2kg-1;

Aqueous solution of potassium water glass having a molar ratio of SiO2K2O 1.5 or 1.0 and solid components 50 wt.% or 40 wt.%, respectively;

- Commercially available quartz sand.

Comparative Examples M1, M2 and M3, and Working Examples M4 and M5:

Accordingly, first of all powder homogenized and then mixed with a liquid component. All examples are two-component system, since an aqueous solution of potassium liquid glass DOB which is in each case separately. Made cylindrical test specimens having a diameter of 25±1 mm and the largest 25±1 mm, the test specimens are tested for resistance chemical resistance according to DIN EN 13888, i.e. after storage for 7 days under standard climatic conditions, the test samples were stored in a test environment. For the classification of mixtures, the compressive strength was determined before and after storage. Experimental compounds are listed in Table 1 in wt. parts. Oxide compositions are anhydrous systems binders are listed in Table 2 wt.%. Table 3 shows the compressive strength of the test samples before and after storage in a test environment; standard climatic conditions should be understood as a value of 23°C and 50% relative humidity.

Table 1
Raw materialsM1M2M3M4M5
Metakaolin10020
Microsilica210110100
Crushed blast furnace slag30090190180
Potassium liquid glass (50% solids, mod. 1.5)300
Potassium liquid glass (40% solids, mod. 1.0)200200200200
Quartz sand700700700700700

Table 2
OxidesM1M2M3M4M5
5236715454
Al2O3169368
CaO<134102221
M2O3114141414
Table 3
Compressive strength N / mm-2M1M2M3M4M5
7D standard climatic conditions>7 >30>30>30>30
7D standard climatic conditions and 3D in 10% HCl<2<10>30>30>30
7D standard climatic conditions and 3D in 10% NaOH<2>30<2>30>30
7D standard climatic conditions and 3D in H2O<7>30>30>30>30

Table 3 shows that, after a short duration of curing for seven days under standard climatic conditions, the minimum compressive strength of 15 N mm-2required according to DIN EN 13888, is achieved M2 through M5. Whereas, despite this reference system M1 through M3 after acid, water and/or alkali treatment is N. skou compressive strength, very high compressive strength can be determined in the case of M4 and M5 according to the invention, even after storage in different test environments. System according to the invention, respectively, resistant to acid, water and lye.

1. System inorganic binder, which includes
10-30 wt. parts of at least one latent hydraulic binders, selected from blast furnace slag, slag sand, ground slag, electrothermal phosphorus slag and metal-containing slag,
5-22 wt. parts of at least one amorphous silica selected from precipitated silica, fumed silica, microsilica and glass powder,
0-15 wt. parts of at least one reactive filler selected from lignite fly ash, mineralogies fly ash, metakaolin, volcanic ash, tuff, track, pozzolan and zeolites, and
3-20 wt. parts of at least one alkali metal silicate selected from compounds having the empirical formula mSiO2·nM2O, in which M represents Li, Na, K or NH4or their mixture, preferably Na or K, and the molar ratio of m:n is ≤3.6, preferably ≤3.0, and particularly ≤2.0, in particular, ≤1.70, and most preferably ≤1.20
W the system binder includes 12-25 wt.% CaO,
in which bonding is required 10-50 wt. parts, preferably 20-40 wt. parts of water, and
in which a latent hydraulic binder, amorphous silicon dioxide and optional reactive filler is present in the form of a first component and a silicate of an alkali metal together with at least the amount of water required for bonding, present in the form of the second component.

2. System binder under item 1, which includes
10-30, preferably 15-25 wt. parts latent hydraulic binders,
5-20, preferably 5-17, wt. parts of amorphous silicon dioxide,
0-15, preferably 0-10 wt. parts of the reactive filler, and
3-20, preferably 4-15 wt. parts of silicate of an alkali metal.

3. System binder under item 1 or 2, characterized in that it additionally contains an inert fillers and/or additional additives.

4. System binder under item 1, characterized by the fact that there is ≤20%, preferably ≤10 wt.% the cement.

5. The system binder as defined in any of paragraphs.1-4, as such or as a component of compositions for construction materials and/or construction products such as concrete, completed part of concrete, concrete products, concrete blocks, as well as local the concrete, shotcrete, concrete factory preparation, construction adhesives and adhesives for thermal insulation composite systems, concrete repair systems, one-component and two-component sealing cement mortars, templates for levelling concrete, mortar, plaster, and self-leveling compositions, mastic for bonding ceramic tiles, plaster and plaster coatings, adhesives and sealants, coatings, in particular for tunnels, wastewater lines, protecting spray and condensate, dry mortar, liquid mortar for sealing joints, drainage mortars and/or mortars for repair.

6. Application in accordance with p. 5, characterized in that after hardening, curing for seven days and subsequent storage for three days in acid, base and/or water, the mortar has a compressive strength of more than 15 H mm-2preferably more than 20 N mm-2and in particular more than 25 N mm-2as determined according to DIN EN 13888.



 

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SUBSTANCE: invention relates to production of inorganic heat-resistant rustproof composites in production of plastics, antirust and lubing materials for construction, electrical engineering, etc. Proposed method comprises mixing of inorganic natural material, liquid glass, dolomite powder and additive, mix forming and thermal treatment. Used is liquid sodium glass, its density making 1.28-1.42 kg/m3, as inorganic natural material, that is, montmorillonite modified by organic substance. Said additive represents a hydrated cellulose fibre shaped to 5.0-20.0 mm long staple impregnated with 30%-aqueous solution of iron, zinc, copper and aluminium sulphates taken in the ratio of 1.0:0.5:0.5:1.0 in flushing bath for 70-80 minutes. Then, said fibre is squeezed to moisture content of 60-65% and dried at 120-140°C to remove 95-98% of residual moisture. Components are mixed by mechanical activation for 8-10 minutes, mix being formed and annealed at temperature increase from 140°C to 1300°C for 30-40 minutes. Note here that montmorillonite is modified by the product of interaction between caprolactam or its oligomers with butyl stearate. Mix contains components in the following ratio in wt %: modified montmorillonite - 20-60, liquid glass - 20-30, dolomite - 10-35, cellulose fibre - 10-15. This invention is developed in dependent clauses.

EFFECT: higher fire resistance, lower heat conductivity factor, antirust properties.

3 cl, 3 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to industry of construction materials and may be used for production of non-baked heat insulation materials, used for insulation of buildings, structures and pipelines. A composition for production of a heat insulation material, including a binder, a silica-containing filler and boric acid, the binder is an aqueous solution of sodium polysilicate with a silicate module 4.2, produced by introduction of 10% silicon dioxide hydrosol into 30% aqueous solution of sodium silicate with their ratio of 1:1, mixing at 100°C for 3.0 hrs with subsequent soaking at this temperature for 0.4 hrs, and the specified filler - finely ground diatomite at the following ratio of components, wt %: aqueous solution of sodium polysilicate 92.0-95.5, diatomite 1.5-3.0, boric acid 3-6.

EFFECT: increased compression strength and reduced density of a heat insulation material.

1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to raw material mixtures for obtaining a heat-insulating material, which is applied for the production of heat-insulating coatings of pipelines with cooling media in nuclear and thermal power plants. A composition for obtaining the heat-insulating material includes a binding agent, a silica-containing filler, sodium fluorosilicate and polyethyleneglycol, as the binding agent it contains a water solution of sodium polysilicate with the silicate modulus 4.2, obtained by the introduction of 10% hydrosol of silicon dioxide into a 30% water solution of sodium silicate with their ratio of 1:1, mixing at 100°C for 3.0 h with the following exposure at the said temperature 0.4, and the said filler - milled gaize with the following component ratio, wt %: water solution of sodium polysilicate 100, milled gaize 0.01-45, sodium fluorsilicate 10-40, polyethylorganosilicone 5-25.

EFFECT: reduction of density and the thermal conductivity coefficient.

1 ex, 1 tbl

FIELD: construction.

SUBSTANCE: raw mixture for production of heat-insulating layer, comprising fibrous filler, liquid glass, as fibrous filler includes the fibre composite, obtained on the basis of cotton fibres, and having a form of flakes of tangled fibre, at the following ratio of components, weight parts: fibre composite 100, liquid glass 50-100.

EFFECT: simplification of preparation technology of heat-insulating layer.

1 tbl

FIELD: construction.

SUBSTANCE: raw mixture for production of heat-insulating layer contains, weight parts: fibrous metal-ceramics 100, liquid glass 65-75, chalk stone 10-15.

EFFECT: increase of operating temperature.

2 tbl

FIELD: construction.

SUBSTANCE: invention relates to construction industry, to the method to produce glass haydite and porous ceramics. In the method to produce glass haydite and porous ceramics including preliminary grinding of silicon-containing mixture of fossil meal and silica clay and its subsequent mixing with an alkaline component - caustic soda, granulation of the produced mixture, swelling and sintering in a rotary furnace, the specified silicon-containing mixture is previously exposed to grinding to fraction of 3-5 mm with subsequent drying at temperature of 600°C to moisture of 10%, repeated grinding to produce powder of fraction of 0.315 mm, then the produced powder is serially exposed to granulation and chemicalisation in a turbulent granulating machine, where the power is supplied in a dosed manner, as well as caustic soda solution, with production of granules of fraction from 1.5 to 2.5 mm, then the produced granules are exposed to repeated granulation and chemicalisation in a plate granulating machine, where the produced granules are supplied in a dosed manner, the specified powder and caustic soda solution, with production of granules of final fraction from 5 to 7 mm with moisture of 45% by mass, which are exposed to drying, swelling and sintering to achievement of swelling coefficient from 2.2 to 5.5 depending on the specified formula, in a rotary hearth furnace with temperature of 740-760°C for 15-20 minutes, or thermal treatment of granules is carried out at an electric conveyor in process of their delivery to a consumer.

EFFECT: production of semi-dry granules of high strength with low water content in a solution for chemicalisation of components, combination of processes of chemicalisation and granulation.

FIELD: chemistry.

SUBSTANCE: invention relates to production of high-strength, light-weight heat-noise-moisture insulating, heat-resistant structural materials. A crude mixture for producing heat-noise-moisture insulating, heat-resistant material, which contains filler - expanded pearlite or expanded vermiculite, quartz sand, schungite or liquid glass, contains said pearlite or vermiculite with particle size of 0.5-2.5 mm, quartz sand, containing not more than 3% silt and clay, with particle size of 0.01-0.03 mm, liquid glass with density of 1.45 g/cm3 and additionally basalt or glass fibre with particle size of 3-7 mm, magnesite powder, magnesium chloride solution with density of 1.2-1.25 g/cm3 and sodium silicofluoride, wherein the magnesite powder and schungite are in form of a magnesite-schungite mixture in ratio 1:3, with the following ratio of components, wt %: said sand - 21.5-26.88, said fibre - 0.54-0.65, said mixture - 8.06-9.14, said liquid glass - 10.75-12.37, sodium silicofluoride - 0.5-1.5, said solution - 2.0-2.2, said filler - the balance. The method of producing a structural article from said crude mixture is characterised by mixing quartz sand with a portion of liquid glass to a homogeneous mass, adding the expanded pearlite or vermiculite and basalt fibre or glass fibre, mixing to uniform distribution, adding the magnesite-schungite mixture in ratio 1:3, said magnesium chloride solution and then adding the remaining liquid glass, sodium silicofluoride and mixing all components to homogeneity, pouring the prepared mixture into a mould, the bottom of which is uniformly coated with a layer of quartz sand with thickness of 2.0-2.5 mm, leaving 2-3 mm from the top edges of the mould, filling the mould to the top edges with a mixture of the magnesite-schungite mixture in ratio of 1:3 with magnesium chloride solution with density of 1.2-1.25 g/cm3 in ratio of 2.86:1 which is mixed for 4-5 minutes, holding for 55-60 minutes and removing the article from the mould after vibrating the mould for 1.5-2.0 minutes.

EFFECT: reduced water absorption.

2 cl, 1 ex, 1 tbl

FIELD: construction.

SUBSTANCE: invention relates to erection of cast-in-situ structures in difficult-to-access areas, and namely to cast concrete mixtures for cast-in-situ concreting of building structures. A cast-in-situ concreting method of a stationary sea ice-resistant platform involves preparation of concrete mix by mixing of dry components: a binding agent - Portland-slag cement, quartz sand, granite crushed stone with fraction of 5-20 mm, fine crushed mineral filler - MP-1 powder, with water and additives - a plasticising agent based on polycarboxylates - Muraplast FK-63 and hardening retarder - Centrament Retard 390, till concrete mix of cast consistency with cone spread of 50-70 cm is obtained, and with delamination of not more than 0.4% and with preservation capacity of at least 3 hours, supply of concrete mix to a framework with a concrete pump at flow rate of 2500-3000 l/h, and hardening is performed under normal conditions during 28-60 days, at the following component ratio, wt %: Portland-slag cement 13.3-16.9, quartz sand 42.4-42.6, the above said crushed stone 25.3-27.9, mineral powder MP-1 6.6-6.8, the above said plasticising agent 0.1-0.2, the above hardening retarder 0.07-0.08, and water is the rest.

EFFECT: providing viscosity and preservation capacity of concrete mix at its supply, and improving concrete crack resistance.

4 tbl

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