Granulated composite filler based on moulding flask for concrete building products and concrete building product

FIELD: construction.

SUBSTANCE: granulated composite filler for concrete products of size 0.5-10.0 mm, consisting of core and shell, wherein the core is obtained by granulating the mixture together with moulding flask and sodium hydroxide milled up to the specific surface area of 150-250 m2 / kg at their weight ratio of 0.70- 0.95: 0.05-0.30 with combination by aqueous solution of sodium silicate with density of 1.2-1.3 g / cm3 in the amount of 0.1-7.0 wt % of mixture, and shell is formed on the surface of core by its balling with dry dust mixture together with milled quicklime and silicofluoride sodium in a weight ratio of 0.85-0.95: 0.05-0.15 with the subsequent hardening up to the strength not less than 0.12 MPa, alkylsulphonate heated up to 50°C is used at obtention of core together with the indicated combination in the amount of 0.1-7.0 wt % of weight of the core components. Concrete building product is produced by using the granulated filler indicated above.

EFFECT: decrease of duration of steam treatment and water resistance of concrete products when increasing and maintaining the strength characteristics.

2 cl, 1 tbl, 1 ex

 

The invention relates to the production of building materials and can be used to obtain concrete building products subjected to heat and moisture treatment, hardening, for civil and industrial construction.

Known granular filler to obtain a concrete mixture consisting of core and containment. The core is manufactured by granulation on a plate granulator mixture of dispersed silica components - ash TPP (dispersion of not less than 200 m2kg) and sludge wastewater treatment plant biological treatment of industrial wastewater with a bunch of

- ground lime (dispersion of 500-600 m2/kg) and gypsum (mark of not less than 100 and dispersion of not less than 350 m2/kg) mixing ratio, respectively, 0.3:0,5:0,15:0.05 mass. After granulation on the core is coated with the protective sheath thickness of 3-5 mm by wetting the core granules with liquid glass and dusting or okutyvaya on disc or drum granulator dry powdered mixture of lime, gypsum and mineral dispersed filler (ash TPP, TPP, loam etc) in the ratio of mixture components, respectively, of 0.35:0,10:0,55 mass. After the formation of granules with the purpose of curing applies heat and humidity treatment at a temperature of 90°C With isothermal exposure for real the hour [RF Patent №2077517, CL 6 SW 20/10, 1993].

A disadvantage of the known granular filler is that in the manufacture of concrete products require high costs of thermal energy for heat and humidity treatment: first exposed to heat and moisture treatment granular filler, then formed building material comprising the above-mentioned filler, and that the resulting concrete building products subjected to heat and moisture treatment, hardening, have low resistance and hardness. The use of this filler does not contribute to reducing the duration of moist curing of concrete products.

Closest to the proposed solution is the use of unburned granular filler to obtain a concrete mixture. The concrete mixture in addition to Portland cement and fine aggregate (silica sand) includes composite filler in the form of unburned pellets in the base of the mold box and sodium hydroxide. The technology of manufacturing of concrete products for the prototype includes the mixing of the components of composite granular aggregate, Portland cement, silica sand and water, molding and heat treatment of them in the steam chamber for mode 2+6+2 at atmospheric pressure and a temperature of isothermic the nuclear extracts 85-95°C for 6 hours [RF Patent №2361834, CL SW 28/04, 2007].

The disadvantages of this granular aggregate and concrete products is the fact that the filler can significantly reduce the time of heat treatment of concrete products; to provide improved water resistance.

The present invention aims to reduce the duration of moist curing, hardening with increasing and maintaining the strength characteristics of concrete products, reducing their permeability.

This result is achieved by using granulated composite filler for concrete (0.5-10.0 mm, consisting of a core and a shell, where the core is obtained by granulating the mixture together ground to the specific surface area of 150-250 m2/kg flasks and sodium hydroxide, in their mass ratio 0,70-0,95:0,05-0,30 with a bunch of water solution of sodium silicate density of 1.2-1.3 g/cm3in an amount of 0.1-7.0 wt.% from the mixture, and the shell formed on the surface of the nucleus balling his dry powdered mix together ground unslaked lime and sodium silicofluoride in a mass ratio of 0.85-of 0.95:0.05 to 0.15, with subsequent hardening to strength not less than 0.12 MPa, which according to the proposed decision if the engine simultaneously with the specified bundle, use warmed to 50aboutWith alkylsulfonate in quantity is 0.1 to 7.0 wt.% from the weight of engine components.

Alkylsulfonate at room temperature pasta whitish color, but when heated to 50°C and diluted allows the spray nozzles.

Alkylsulfonate is a mixture of sodium salts alkylsulfonic acids with long chain alkyl radical With11-C18from n-paraffins; has the chemical formula R-SO2Na. Experiments show that the efficiency for reducing the viscosity of hydrosilicates sodium with alkyl sulphonates extremely high, the presence of small quantities of the reagent increases the mobility of ions of silicon.

The state of the crystal structure of the concrete during moist curing was monitored using a scanning electron microscope high resolution Supra 50 VP (LEO, Germany), the kinetics of absorption of lime - electron diffractometer DRON.

Declare concrete construction product is characterized by the fact that it is obtained using the specified placeholder.

Feature components:

1. As a binder in obtaining concrete samples used Portland cement JSC "Belgorodcement" according to GOST 10178-85. Brand cement 400. Normal density of cement grout in accordance with GOST 310.4-81 - 27,12%activity when steaming of 38.4 MPa, activity under normal curing age of 28 days - 43,7 MPa.

2. As a fine aggregate of betondachsteine used natural quartz Wolski sand GOST 6139-2003.

3. For the manufacture of cores of filler used flask, selected from open pit Korkino field. Chelyabinsk region. Chemical composition, wt.%: SiO2of 76.3; Al2O3an 8.4, Fe2O3- 3,1, TiO2to 0.2, CaO - 2,2; MgO - 1,0; R2O - 1,7; PPP - 3,3.

4. Sodium hydroxide according to GOST 2263-79;

5. Alkylsulfonate on THE 2481-308-05763458-2001.

6. For the manufacture of a protective sheath filler used quicklime construction industry JSC "building Materials", Belgorod according to GOST 9179-77.

7. Sodium silicofluoride Na2SiF6on THE other 6-09-1461-91.

8. The water tap according to GOST 23732-79.

9. When granulating powder together ground flasks with sodium hydroxide on a plate granulator as ligaments used an aqueous solution of sodium silicate (liquid glass) TU 2385-001-54824507-2000 density of 1.25 g/cm3.

To obtain nuclei of granular filler when implementing the inventive method of producing concrete products flask was dosaged with sodium hydroxide by the gravimetric method. The resulting mixture was loaded into a ball mill, and produced mixing and grinding to achieve a specific surface area of 200 m2/kg. Granulating the obtained mixture was performed using disc granulator by spraying on the surface of the powder aqueous solution of sodium silicate raft the awn of 1.25 g/cm 3. Through the additional nozzle from a separate, heated to 50°C capacity on a plate granulator sprayed alkylsulfonate. The number was regulated by a flow meter. Speed and angle of inclination of the plate granulator regulate the diameter of the granular material. The obtained cores were sent to the washing powder lime, ground together with sodium silicofluoride at a ratio of 0.9:0.1 to by weight. On the sieve with mesh size of 0.5 mm was separated granular material and sent to storage at ambient temperature. Control of strength of granular aggregate at ambient temperature produced by testing in the cylinder according to GOST 9758.

Example. Preparation of nuclei of granular fill. The mold (7.4 kg) and sodium hydroxide (1.8 kg), (table., mixture 1) was milled in a mill together until the specific surface area of 200 m /kg of the Obtained powder material was applied on the plate granulator. On the surface of the powder by spray was applied an aqueous solution of sodium silicate density of 1.25 g/cm3. Simultaneously heated to 50°From the tank via the flow meter sprayed alkylsulfonate in the amount of 0.4 kg (4 mass%). Speed and angle of inclination of the plate granulator regulate the diameter of the produced nuclei, which was in this case 4.4 to 4.5 mm

Recip is the protective coating on the cores. The obtained cores were sent to the dusting powder lime (9 kg), ground together with sodium silicofluoride (1 kg), i.e. in the ratio of 0.90:0.10 to, to obtain pellets of a size 5.0 mm (PL., a mixture of 1). The powder produced in a drum mixer.

Part of the obtained granulated material after storage for 7 hours at ambient temperature were tested for strength by compression in the cylinder according to GOST 9758; the rest is used in the preparation of concrete mixes for prototype construction products. The strength of granules during compression was 0.3 MPa.

The concrete mix. The dosage of the components produced weight: 2 kg of Portland cement (20 wt.%, table., a mixture of 1), 2.5 kg (25 wt.%) quartz sand and 3.5 kg (35 wt.%) granulated filler were mixed in a screw mixer until smooth and added 2 kg (20 wt.%) water.

The molded samples were produced in the traditional way by filling in standard forms FC-100 GOST 10181-2000. The exposure time in the form of 6 hours.

Heat-moisture treatment of concrete samples produced in the steam chamber at atmospheric pressure for mode 2+6+2 and the temperature of isothermal soaking 90°C. thus, the preparation of concrete mixture, forming samples and heat-moisture treatment produced according about what otipo [RF Patent №2361834, CL SW 28/04, 2007]. Time isothermal exposure ranged from 3 to 6 hours, by controlling the state of the internal structure of concrete samples instrument.

The core of the aggregate of the prototype (see RF patent №2361834, example 1) did not contain alkylsulfonate, and the average granular filler had the strength cylinder crushing 0.31 MPa.

Samples of concrete were tested for strength (according to GOST 10180), determined the resistant (according to GOST 12730.5-84). The results are given in table (mixture 1).

In the same way were obtained concrete products with other components of the kernel granular fill.

Analysis of the test results of sample properties of concrete construction products shows the following.

1. Introduction in the concrete composition of the inventive granular filler consisting of a nucleus in the form of interconnected liquid glass together crushed silica clay, sodium hydroxide and the addition of alkylsulfonate, which is covered by a shell of ground lime and sodium silicofluoride, you get strong waterproof concrete products, reduce the time of heat-moisture treatment of almost 60% and significantly reduced the energy intensity of obtaining concrete products.

2. Reducing the number of alkylsulfonate in the core of granular aggregate ,1 wt.%, reduces the reactivity of the resulting granules, which reduces the time of heat-moisture treatment on almost half an hour (mix 2), managed to increase the water resistance of the resulting concrete products, this composition is taken as the boundary.

Further reducing the number of alkylsulfonate in the kernel filler concrete products does not reduce the duration of treatment, therefore, the composition of the mixture 4 is beyond the scope claimed.

The composition and properties of granular aggregate, concrete mixtures and derived products
Table
The kernel granular filler, wt.%The compressive strength of the cylinder through 7 hours of natural hardening, MPaThe concrete composition, wt.%Physico-mechanical properties of concrete products after heat-moisture treatment
No. mixturesFlaskSodium hydroxideAn aqueous solution of sodium silicate density of 1.25 g/cm3 AlkylsulfonatePortlandQuartz sandThe granular fillerWaterBrand concrete waterproofingThe limit of compressive strength, MPaThe duration of moist curing to obtain the maximum compression strength, h
1.74,018,04,04,00,3020253520B845,64,0
2.76,72MT 19 : 184,00,10,3120253520V736,95,5
3.71,0 18,04,07,00,1220253520B945,23,7
4.76,7619,194,00,050,3120253520B636,36,0
5.70,5of 17.54,08,00,0620253520OT35,1-
6 (prototype).of 76.819,24,0-0,312025 3520B636,36,0

3. The increase in the number of alkylsulfonate in the core of granular filler to 7.0 wt.% shows its effectiveness on increasing the mobility of silicates of sodium, which contributes to accelerated silicotuberculosis, healing of structural defects, increase the strength of the concrete material, a significant reduction in the duration of moist curing. However, there is a decrease in the mechanical strength of a granular material that is extremely important indicator when using a screw mixer in the preparation of concrete mixes. Therefore, this composition is taken as the boundary (mixture 3).

Further increase in alkylsulfonate in the core of granular filler leads to a significant reduction of mechanical strength of a granular filler and it becomes unsuitable for the production of concrete products, therefore, the composition of the mixture 5 is beyond the scope claimed.

At the optimum ratio of components (a mixture of 1, table). the resulting concrete products have the following advantages compared with the known: when increasing the strength characteristics by reducing defects in the structure and accelerated education hydrosilicate is to increase the water resistance of the resulting concrete products and 60% decrease in the time of heat-moisture treatment, this significantly reduces the required energy in their manufacture.

When using concrete mixtures with boundary components (mixture of 2 and 3, table). the resulting concrete product virtually retain the water resistance and strength characteristics compared to similar properties of the prototype.

During steam curing of concrete products in the nuclei of granular aggregates synthesized water-soluble silicates of sodium, which in the presence of alkylsulfonate in the claimed amounts acquire high mobility and penetrating through the protective shell granules, ensure saturation of the concrete matrix of water-soluble ions of the silica to a depth of 6-12 mm and more, extremely accelerate the processes of mineral formation and contribute to the strength of the structure. It is known that the presence of mobile ions silica contributes to accelerated growth of crystals, accelerate the processes of mineral formation in General, they are beneficial to the silicate structure of the concrete. Mobile ions of silicon produce silication, i.e. chemical fixation structure of the concrete matrix, interact with portlandia - unbound calcium oxide, translating it into a coherent crystalline state, increasing the resistance and the resistance of concrete products in General.

Practice shows that the use of the inventive composite granular aggregates significantly reduces the time steam curing of concrete products.

The presence of mobile ions of silicon during steam curing of concrete products contributes to a more complete binding of free calcium oxide, increases the resistance and the water resistance of concrete.

Composite filler prototype at its introduction into the composition of concrete products in the process of heat-moisture treatment highlights the silicates of sodium, however, they exhibit low mobility, penetrate into their concrete matrix to a depth of no more than 0.2-0.5 mm, i.e. work only in the boundary zones of contact of the concrete matrix with the granulated material, impregnated with only the shell granules and almost never interacts with the concrete matrix by volume.

The inventive granular filler included in the composition of the concrete mixture, and hence concrete products, in the process of heat-moisture treatment partially dissolves, releasing hydrosilicate, which are almost completely absorbed by the concrete matrix. In the place of the granules remain caverns, which increase adhesion to plaster solutions.

1. Granular composite filler for concrete (0.5-10.0 mm, consisting of a nucleus and oblock is, where the kernel is obtained by granulating the mixture together ground to the specific surface area of 150-250 m2/kg flasks and sodium hydroxide in their mass ratio 0,70-0,95:0,05-0,30 with a bunch of water solution of sodium silicate density of 1.2-1.3 g/cm3in an amount of 0.1-7.0 wt.% from the mixture, and the shell formed on the surface of the nucleus balling his dry powdered mix together ground unslaked lime and sodium silicofluoride in a mass ratio of 0.85-of 0.95:0.05 to 0.15, followed by hardening to strength not less than 0.12 MPa, wherein when receiving the engine simultaneously with the specified bundle, use warmed to 50aboutWith alkylsulfonate in an amount of 0.1-7.0 wt.% from the weight of engine components.

2. Concrete construction product, characterized in that it is made using granulated filler according to claim 1.



 

Same patents:
Stowing composition // 2531408

FIELD: mining.

SUBSTANCE: stowing composition comprising portland cement, plastifying agent, fine-grained filler - sand and water, additionally comprises as a binder the milled tailings of wet magnetic separation of ferrous quartzites with an average particle size of 2.071 microns, as a plastifying agent - superplasticiser SP-1, and the sand with an average particle size of 62.26 microns with the following ratio of components, wt %; the said cement - 13.48; the said sand - 56.43; the said wastes - 2.70; superplasticiser SP-1 - 0.138; water - the rest.

EFFECT: decrease in cement consumption, and increase in the strength of the stowing composition, use of sand with a lower fineness modulus.

1 ex, 2 tbl

FIELD: construction.

SUBSTANCE: granulated composite filler for concrete products of size 0.5-10.0 mm, consisting of core and shell, wherein the core is obtained by granulating the mixture together with diatomite and sodium hydroxide milled up to the specific surface area of 150-250 m2/kg at their weight ratio of 0.70-0.95:0.05-0.30 with bond by aqueous solution of sodium silicate with density of 1.2-1.3 g/cm3 in the amount of 0.1-7.0 wt % of mixture, and shell is formed on the surface of core by its balling with dry dust mixture together with milled quicklime and silicofluoride sodium in a weight ratio of 0.85-0.95:0.05-0.15 with the subsequent hardening up to the strength not less than 0.12 MPa, after the indicated balling the additional spraying of 40% aqueous solution of oxalic aldehyde in the amount of 1.0-8.0 wt % (per 100% substance) of weight of shell components is carried out. Concrete building product is obtained by using the granulated filler indicated above.

EFFECT: decrease of thermal conductivity and water resistance of concrete products when increasing and maintaining the strength characteristics.

2 cl, 1 tbl, 1 ex

FIELD: construction.

SUBSTANCE: fine-grained cement concrete is composed of cement, sand, water, plasticizing agent and basalt fibre, introduced into the mixture by the hydraulic opening method, at the following ratio of components, wt %: cement - 34, sand - 64, water - 1.4, plasticizing agent - 0.3, basalt fibre - 0.3.

EFFECT: increase of fracture toughness, strength, resistance of micro-reinforcing component to the influence of aggressive alkaline environment of the cement stone.

2 tbl

FIELD: chemistry.

SUBSTANCE: subject of the present invention is a dry binder premix which contains the following, wt %: portland clinker having a Blaine specific surface area of 4500 to 9500 cm2/g, preferably 5500 to 8000 cm2/g, the minimum quantity of the clinker by mass percentage relative to the total mass of the premix being determined according to formula (I): [-6.10-3×SSBk]+75, in which SSBk is the Blaine specific surface area given in cm2/g; fly ash; at least one alkali metal sulphate, the quantity of alkali metal sulphate being such that the quantity of equivalent Na2O in the premix is greater than or equal to 5 wt% relative to the mass of fly ash; at least one source of SO3, in a quantity such that the quantity of SO3 in the premix is greater than or equal to 2 wt % by relative to the mass of portland clinker; complementary materials having a Dv90 less than or equal to 200 mcm selected from limestone powders, the quantity of clinker+the quantity of fly ash being greater than or equal to 75 wt %, preferably 78 wt %, relative to the total mass of the premix; the total quantity of clinker in the premix being strictly less than 60 wt % relative to the total mass of the premix. The subject of the invention is also a dry binder mix obtained by mixing said premix with aggregates, as well as a concrete grout composition obtained by mixing with water.

EFFECT: obtaining concrete with low carbon dioxide emission.

13 cl, 1 dwg, 3 tbl

FIELD: construction.

SUBSTANCE: raw mixture for production of coarse aggregate shell contains, wt %: Portland cement 30.0-35.0; casein glue 4.0-7.0; fly ash 28.0-31.0; water 30.0-35.0.

EFFECT: increase of bonding strength of shell with the surface of the coarse aggregate.

1 tbl

FIELD: construction.

SUBSTANCE: raw mixture for production of artificial rock includes, wt %: Portland cement 26-30, silica sand 48.44-56.9, water 16-20, fibrous metal-ceramics 1.0-1.5, phenyletoxisiloxane 0.06-0.1.

EFFECT: increase of strength.

2 tbl

Concrete mixture // 2530038

FIELD: construction.

SUBSTANCE: concrete mixture comprises, wt %: Portland cement 25.0-27.0; characterized by particle-size composition, wt %: particles larger than 0.63 mm, but smaller than 1 mm - 0.2; larger than 0.315 mm, but smaller than 0.63 mm - 4.8; larger than 0.14 mm, but smaller than 0.315 mm - 62; smaller than 0.14 mm - 33 ash and slag filler 15.0-19.0; slag pumice with density of 0.4-1.6 g/cm3 crushed and sieved through mesh No. 10 - 30.3-34.3; aluminium powder 0.1-0.2; superplasticizing admixture C-3 - 0.5-0.6; water - 23.0-25.0.

EFFECT: increase of concrete strength.

1 tbl

FIELD: chemistry.

SUBSTANCE: crude mixture for producing material which imitates natural stone, which includes ground mica and liquid glass, further contains water, white portland cement, quartz sand, green phthalocyanine pigment or light-blue phthalocyanine pigment, with the following ratio of components, wt %: ground mica which is sieved through sieve N5 35.0-40.0, liquid glass 3.0-5.0, water 16.0-18.0, white portland cement 27.0-31.0, quartz sand 10.7-13.9, green phthalocyanine pigment or light-blue phthalocyanine pigment 0.1-0.3.

EFFECT: high water-resistance.

1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to construction materials and specifically to multicomponent dry construction mixtures, and can be used in making a thin reinforced cladding for large concrete blocks in large concrete block building construction, including for repairing the surface of large concrete blocks, floor slabs, supporting frames etc. The dry construction mixture includes mineral binder, natural quartz sand and crushed limestone screenings, a complex additive UP-4 and waste polypropylene fibres, with the following ratio of components, wt %: portland cement - 19.65-18.7, natural quartz sand Mk-1.82 - 43.0-37.0, crushed limestone screenings with particle size of 0-5 mm - 37.0-44.0, complex additive UP-4 - 0.15-0.1, waste polypropylene fibres - 0.2.

EFFECT: low consumption of portland cement, improved adhesion properties and workability, high compression and tensile strength, preventing corrosion of fibres during use of the article.

2 tbl

FIELD: construction.

SUBSTANCE: invention relates to the field of construction, in particular, to compositions and methods to produce lighter masonry mortars designed to arrange enclosures from effective small elements. The method includes mixing of portland cement with water and superplasticiser S-3 in a mortar mixer, subsequent introduction of hollow glass microspheres into the produced mix, mixing of all components of the mortar and subsequent extrusion of the produced composition at the following ratio of components, wt %: portland cement - 37.5…67.2, hollow glass microspheres - 6.7…18.7, modifying additive - 0.28…0.50, water - 25.5…43.5. A raw composition for production of a lighter masonry mortar is produced by the above method.

EFFECT: reduced average density and increased strength of a lighter masonry mortar.

2 cl, 5 tbl

FIELD: construction.

SUBSTANCE: granulated composite filler for concrete products of size 0.5-10.0 mm, consisting of core and shell, wherein the core is obtained by granulating the mixture together with diatomite and sodium hydroxide milled up to the specific surface area of 150-250 m2/kg at their weight ratio of 0.70-0.95:0.05-0.30 with bond by aqueous solution of sodium silicate with density of 1.2-1.3 g/cm3 in the amount of 0.1-7.0 wt % of mixture, and shell is formed on the surface of core by its balling with dry dust mixture together with milled quicklime and silicofluoride sodium in a weight ratio of 0.85-0.95:0.05-0.15 with the subsequent hardening up to the strength not less than 0.12 MPa, after the indicated balling the additional spraying of 40% aqueous solution of oxalic aldehyde in the amount of 1.0-8.0 wt % (per 100% substance) of weight of shell components is carried out. Concrete building product is obtained by using the granulated filler indicated above.

EFFECT: decrease of thermal conductivity and water resistance of concrete products when increasing and maintaining the strength characteristics.

2 cl, 1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to industry of construction materials and can be used for obtaining concrete construction products. Granulated nanostructuring filling agent based on highly silica components for concrete mixture, consisting of silica-containing raw material in form of granules with size 0.5-10 mm, which have core, bound by means of water solution of alkali-containing binding agent, and protective envelop, where core consists of highly silica rock, crushed until it passes sieve with 0.315 mm cell or swollen perlite sand with particle size to 0.16 mm, as binding agent used is water solution of hydroxide of alkali metal and sodium silicate, taken with ratio 0.6-0.99:0.01-0.4 by weight, in amount 5-30% of mixture, and protective envelop on core surface is formed by its granulation with dry Portland cement with further hardening to strength not lower than 0.12 MPa. Concrete mixture for manufacturing construction product in accordance to one version contains, wt %: Portland cement 15-25, sand 50-60, water 10-13, claimed filling agent 2-20; in accordance with the other version it contains, wt %: Portland cement 20-35, water 10-15, claimed filling agent 50-70. Concrete construction product, manufactured from said mixture by one or the other version.

EFFECT: reduction of density of filling agent and product, reduction of heat conductivity with preservation of strength.

4 cl, 2 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to industry of building materials and can be applied for obtaining concrete building products in industrial and civil construction. Granular nano-structure-forming filler based on highly siliceous components for concrete mixture, produced from silica-containing raw material, in form of granules with size 0.5-10 mm, which consist of core and formed on its surface protective coating from dry dust-like mixture of jointly milled quicklime and sodium silicofluoride with their weight ratio 0.85-0.95:0.05-0.15 with the following solidification to strength not less than 0.12 MPa, where core is obtained by granulation of silica-containing rock mixture, milled to passing through sieve with cell 0.315 mm, and swollen perlite sand with size of particles to 0.16 mm, in ratio 0.60-0.95:0.05-0.40 by weight, fastened by alkaline-containing binding agent, which consists of water solution of alkali metal hydroxide and Na silicate with density 1.2-1.3 g/cm3 (alkaline:silicate=0.85-0.95:0.05-0.15 by weight) in quantity 5-20% of mixture. Concrete mixture, which contains, wt %: said filler 20-50, cement 10-15, sand 25-50, water - the remaining part. Concrete building product, obtained from claimed mixture.

EFFECT: elimination of aggregation in the process of milling, reduction of density and heat-conductivity with increase and preservation of product strength, reduction of power consumption.

3 cl, 1 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to construction, particularly to a method of producing heat insulating material based on wood processing wastes. The method of producing heat insulating material involves mixing solution-pretreated wood aggregate, portland cement, an additive and water, followed by moulding and hardening. The wood aggregate used is industrial chips. The solution used to treat the aggregate is 30% sodium glass solution in amount of 10% of the weight of the wood aggregate. The portland cement used is based on portland cement clinker with ultimate strength of 40 MPa, which is premixed with the additive which is in form of powdered calcium chloride with weight content of calcium chloride of at least 90% and in amount of 2% of the weight of portland cement. After mixing said components with water, the mixture is further mixed with process foam from an aqueous solution of 1% protein hydrolysate, with the following ratio of components, wt %: industrial chips - 38-40, said sodium glass solution - 3.8-4.0, portland cement - 39-42, calcium chloride - 0.3-0.36, said process foam - 0.8-0.85, water - the balance. The material is moulded in a press mould at pressure of 0.1÷0.35 MPa, followed by hardening at temperature of 50÷60°C and relative air humidity of 70÷80%. After hardening, a cladding is deposited, the cladding consisting of a polyol and a polyisocyanate, with the following ratio of components, wt %: polyol - 55, polyisocyanate - 45.

EFFECT: low density of the material and improved heat insulation properties thereof.

1 dwg, 1 tbl

FIELD: process engineering.

SUBSTANCE: invention may be used for making concrete mixes, mortars and other mixes containing cement. Method of processing puzzolanes including slag and flue ash such as Class F and/or Class C comprises subjecting puzzolanes to high-intensity grinding in appropriate grinders. Note here that low-density hollow particles as larger particles of slag get decomposed to activate surface of said particles to make finished product feature the following distribution of particles by sizes (in wt %): ≤5 micron - 15-25, ≤10 micron - 30-40, ≤30 micron - 90-95. Invention is developed in its subclaims.

EFFECT: higher activity of puzzolanes and strength of construction materials.

7 cl, 3 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to production of construction materials and can be used when making silicate wall structures - lime-sand brick, tiles, blocks, wall panels, which are subjected to autoclave treatment during hardening. The method of producing granular aggregate for autoclave hardening silicate articles, consisting of a core and cladding, involves formation of a core in the presence of liquid glass from a mixture of jointly ground foamed pearlite and sodium hydroxide, rolling the cladding on the surface of the core from jointly ground unslaked lime with sodium silicofluoride, curing the granules in a microwave field with specific power consumption of 53-82 J/cm3.

EFFECT: shorter production time, high activity of the granular aggregate, low heat conductivity, improved strength properties of autoclave construction articles.

1 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to production of construction materials and can be used in making concrete structures which are subjected to steam treatment during hardening, for civil and industrial construction. The method of producing granular aggregate for concrete, consisting of a core and cladding, involves formation of the core in the presence of liquid glass from a mixture of jointly ground foamed pearlite and sodium hydroxide, rolling the cladding on the surface of the core from jointly ground unslaked lime with sodium silicofluoride, curing the granules in a microwave field with specific power consumption of 41-86 J/cm3.

EFFECT: shorter production time, high activity of the granular aggregate, as well as high water impermeability of concrete structures and low heat conductivity thereof.

1 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to oil-and-gas industry and can be used to prepare light backfill cement grout when casing cementing gas, gas-condensate and oil wells. The method of preparing a lightening additive for backfill cement grout involves separating aluminosilicate microspheres from an aqueous suspension of ash dust from thermal power plants via hydroseparation and removing emerging aluminosilicate microspheres, dehydrating the microspheres, drying and fractionating the microspheres, containing the following in wt %: SiO2 52.1-56.1; Al2O3 33.1-37.8; Fe2O3 0.5-1.7; CaO 0.34-0.92; MgO 0.23-0.36; Na2O 0.34-0.48; K2O 0.31-0.49; TiO2 0.6-1.5; other impurities - the rest, with separation of five fractions with diametre 1-315 mcm and obtaining their mixture in their following ratio in wt %: 1-50 mcm 4.0-8.0; 51-100 mcm 41.5-42.2; 101-160 mcm 40.0-42.0; 161-200 mcm 8.0-10.0; 201-315 mcm - the rest. From the said limits of the ratios, specific values of the ratio are selected for specific maximum hydrostatic pressure Phydr in the well taking into account the number of broken microspheres for each of the said fraction, where Phydr is defined using the formulae given above. Said additive is obtained using the method given above.

EFFECT: low density of the cement grout and high strength of the hardened cement paste in deep and super-deep wells.

2 cl, 5 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to production of artificial porous aggregates for concrete. The method of producing artificial porous aggregate involves laying granular material into two layers, sintering, grinding and fractionation, wherein the granular material used is glass and/or frit with particle size 1-10 mm, mixing with liquid glass in amount of 10-30% of the weight of the glass and/or frit. The layers are 6-30 mm thick and a 1-10 mm thick intermediate layer is placed in between them using chalk and/or dolomite and/or gypsum dihydrate which is ground to particle size 1-5 mm.

EFFECT: high efficiency of the method.

1 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to production of building materials, specifically to production of heat insulating aggregates used as thermal insulation in various structures and components of buildings. The method of obtaining granular heat insulating material for buildings involves mixing amorphous silica with particle size of 1-100 mcm with silica-containing granular filler such as sand with particle size of 5-70 mcm for 3-10 minutes until a homogeneous granular mass is obtained, adding into the dry granular mass an alkali-containing component which is pre-diluted with water either in form silica-containing binder with density of 1.5-1.7 g/cm3 in ratio of 1:1-4:1, or in form of an aqueous solution of sodium hydroxide or caustic soda in ratio of 1:0.2-1:0.5, mixing the dry granular mass with this alkali-containing component for 3-5 minutes until obtaining a homogeneous paste-like mass, pushing this mass through a draw plate with diametre of 3-8 mm, cutting the filaments coming out of the draw plate into pieces which are at least 5-6 mm long, granulation of with simultaneous expansion of the granules while drying them in a rotating drying chamber at temperature of up to 250°C and with the following ratio of components in wt %: amorphous silica 23.0-34.0, said granular filler 49.0-58.0, said alkali-containing component 4.0-13.0, water - the rest.

EFFECT: simple process, obtaining granules with low thermal conductivity, high strength, water resistance and frost resistance.

1 cl, 2 ex

Stowing composition // 2531408

FIELD: mining.

SUBSTANCE: stowing composition comprising portland cement, plastifying agent, fine-grained filler - sand and water, additionally comprises as a binder the milled tailings of wet magnetic separation of ferrous quartzites with an average particle size of 2.071 microns, as a plastifying agent - superplasticiser SP-1, and the sand with an average particle size of 62.26 microns with the following ratio of components, wt %; the said cement - 13.48; the said sand - 56.43; the said wastes - 2.70; superplasticiser SP-1 - 0.138; water - the rest.

EFFECT: decrease in cement consumption, and increase in the strength of the stowing composition, use of sand with a lower fineness modulus.

1 ex, 2 tbl

Up!