Method of preparing limestone construction rubble

FIELD: construction.

SUBSTANCE: method of preparing limestone construction rubble includes preheating limestone construction rubble to a temperature of 50-60°C, impregnating the heated rubble in an aqueous solution of lignosulfonates at the ratio of lignosulfonates: water, respectively, 1:(8-12) at intensive stirring for 20-30 mines, followed by drying the rubble at a temperature of 100-110°C to a constant weight.

EFFECT: increasing the strength characteristics of limestone construction rubble while reducing the impregnation time and reducing energy costs.

1 tbl, 3 ex

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to the composition of a complex additive. A complex additive for heavy concrete mixtures, which includes technical lignosulphonates and montmorillonite-containing clay, further contains a deactivated catalyst for dehydrogenating cyclohexanol from ε-caprolactam production and a product of combined dispersion to particle size smaller than 10-2 mcm of montmorillonite-containing clay and ε-caprolactam in ratio of 1/0.5 and castor oil and technical hydrogenated fat in ratio of 1/1, with the following ratio of components, wt %: technical lignosulphonates 63-70, deactivated catalyst for dehydrogenating cyclohexanol from ε-caprolactam production 5-7, montmorillonite-containing clay 16-18, ε-caprolactam 8-9, castor oil 0.5-1.5, technical hydrogenated fat 0.5-1.5.

EFFECT: longer periods for the beginning and end of hardening heavy concrete mixtures, high ultimate compression strength of the concrete, high consistency of the concrete mixture and low water absorption of the concrete.

2 tbl

FIELD: construction.

SUBSTANCE: plasticising additive for concrete includes technical lignosulphates and formaldehyde, specified components are contained at the following ratio, wt %: technical lignosulphates - 28-49.5, formaldehyde - 1-7, balance - water up to 100%, at the same time the method to produce an additive includes mixing of initial components of the additive for 360-720 minutes and heating of the mix at the temperature of 65-75°C.

EFFECT: increased mobility of a concrete mix, increased concrete strength, cement saving.

2 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to armature corrosion inhibitor based on water solution of fluorine-containing salt. Additionally introduced are derivatives of lignosulphonic acids with the following component ratio (wt %): fluorine-containing salt - 0.3-1; derivatives of lignosulphonic acids - 30-33; water - the remaining part.

EFFECT: said inhibitor of armature corrosion makes provide more stable passive state of armature in concrete with lower working dosage due to reduction of cement stone permeability and electrochemical effect.

4 cl, 2 tbl

Complex additive // 2527442

FIELD: chemistry.

SUBSTANCE: invention relates to field of construction materials, in particular to compositions of additives, used in production of articles from slow-moving and rigid concrete mixtures with application of technologies of classical vibrational moulding, extrusion moulding and vibropressing. Complex additive includes additives of plasticising and air-entraining action. As additive with plasticising action used are lignosulphonates, with additional introduction into it of accelerator of hardening and regulator of thixotropic properties. Complex additive contains said components with the following ratio, (wt %): lignosulphonate - 30-70; additive with air-entraining action - 2-7; accelerator of hardening - 15-60; regulator of thixotropic properties - 5-15. as additive with air-entraining action, used are alkylsulphates, alkylsulphonates, ethoxylated fatty alcohols, salts of sulphoethoxylated fatty alcohols or mixture of any said compounds. as accelerator of hardening, used are sodium rhodanide, sodium thioculphate, sodium sulphate, sodium or calcium formiate, alkanolamines or mixture of two or more said compounds.

EFFECT: claimed complex additive provides required thixotropic properties of slow-moving and rigid concrete mixtures and accelerates acquirement of strength.

3 cl, 1 tbl

FIELD: chemistry.

SUBSTANCE: claimed invention relates to composition of additive to concretes and mortars and can be applied in production of concrete and reinforced concrete products and constructions with concreting in wide range of environment temperature. In accordance with the first version complex additive for concrete and mortars contains polyalcohols and sodium sulphate, with additional introduction into it of sodium thiosulfate and rhodanide. Claimed complex additive contains said components with the following ratio, (wt %): polyalcohols - 30-80; sodium sulphate - 10-20; mixture of sodium thiosulfate and rhodanide - 10-50. Sodium nitrite can be additionally introduced into complex additive. In accordance with the second version complex additive for concretes and mortars contains polyalcohols and sodium formiate. It additionally contains acyclic, mono- or polycyclic amines with length of hydrocarbon radical C1-C3. Complex additive contains said components with the following ratio (wt %): polyalcohols - 30-70; sodium formiate - 15-25; acyclic, mono- or polycyclic amines - 15-45. Sodium nitrite can be additionally introduced into composition of complex additive.

EFFECT: obtaining complex additive for concretes and mortars with lower temperature of crystallisation, which does not impair indices of preservation of mobility of plasticised concrete mixtures, providing stable acquirement of strength in the entire range of temperatures, including negative ones.

4 cl, 3 tbl

Mortar // 2501758

FIELD: chemistry.

SUBSTANCE: mortar, which contains Portland cement, water and plasticising additive, additionally contains carbamide, and as plasticising additive applied is mixture of lignosulfonate and mixture of oxyethyl and oxypropyl ethers of polyacrylic acids, and ratio of mixture of ethers of polyacrylic acids is from 1:2 to 1:60, excluding ratio 1:3n, where n=1,2,3…20, with content of lignosulfonate in quantity from 0.20 to 0.45 wt% of Portland cement content, and content of carbamide constitutes from 0.01 to 0.10% of Portland cement weight with content of water being from 40 to 60% of Portland cement weight. Mortar can additionally contain sodium sulfate in quantity, equal to quantity of carbamide.

EFFECT: increased strength of obtained cement stone.

2 cl, 17 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to building and industry of building materials, in particular to methods of producing complex nano-dispersive additives for concrete mixtures. In method of producing complex nano-dispersive additive for concrete mixture, obtained by ultrasonic dispersion of water suspension, obtained by mixing schungite, superplasticiser C-3 and water, first, solid phase of suspension is obtained by joined grinding of schungite and superplasticiser C-3 in form of dry substance to specific surface area 380-400 m2/kg in ball grinder, after which it is mixed with water, and dispersion of obtained suspension with concentration of solid phase 3% is performed until size of particles is 90-280 nm at ultrasound frequency 35 kHz with the following content of components, wt %: schungite - 75.0-89.3, superplasticiser C-3 - 10.7-25.

EFFECT: increase of concrete mixture mobility, increased strength, density, reduction of water absorption by concrete, acceleration of solidification of building products and constructions.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a composition of a complex additive for concrete mixtures and mortar and can be widely used in production of monolithic and prefabricated structures, mainly for hydraulic engineering structures and road concrete. The complex additive contains the following (pts.wt): superplasticiser S-3 5-50, isopropyl alcohol 10-55, carbamide 5-45. In a special embodiment of the invention, the complex additive contains the following (pts.wt): superplasticiser S-3 10-30, isopropyl alcohol 10-55, carbamide 5-45, ballast salts from desulphurisation of coke gas based on sodium rhodanate and thiosulphate 5-50.

EFFECT: high frost resistance of concrete in layers and high strength of the concrete after 28 days.

2 cl, 4 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to composition for plasticising and water-reducing additive to concrete and mortar. Plasticising and water-reducing additive to concrete and mortar includes technical lignosulfonate and hydrophobisator in form of water-compatible emulsions of polyalkylsiloxanes with molecular weight 1-20 kDa and alkyl radicals C1-C5, sodium thiosulfate and thiocyanate mixture, resorcinol, pyrocatechol and hydroquinone mixture with ratio (0.35-0.58):(6.32-8.39):(0.5-0.9), sodium carbonate and water with the following component ratio, wt %: lignosulfonate 42.8-57.9, hydrophobisator 0.1-1.0, sodium thiosulfate and thiocyanate mixture12.92-16.44, resorcinol, pyrocatechol and hydroquinone mixture 6.34-8.9, sodium carbonate 16.6-25.5 and water - the remaining part. Invention is developed in dependent claim of invention formula.

EFFECT: increased diluting ability of initial technical lignosulfonates in additive composition to the level of superplasticisers with simultaneous increase of its permissible dosage in cement systems, as well as increased water and frost resistance.

2 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to production of building materials and compositions of crude mixtures for making bricks, which can be used to build low-rise buildings. The crude mixture for making bricks contains the following in wt %: sawdust 10.0-15.0; quartz sand 59.75-69.85; portland cement 20.0-25.0; sulphide-yeast wash 0.149-0.248; calcium chloride 0.001-0.002, with at water/cement ratio equal to 1.

EFFECT: high water resistance of the brick made from said mixture.

1 tbl

FIELD: chemistry.

SUBSTANCE: group of inventions relates to the production of construction materials, namely to a composition for light concrete manufacturing, a method of preparing the composition for light concrete manufacturing and methods of manufacturing light constructive-heat-insulating concrete products. The composition for light concrete manufacturing contains, wt %: Portland cement 45-50, GRES ash microspheres 30-40, reinforcing filler 0.5-11.0, water - the remaining part, with the GRES ash microspheres and reinforcing filler being activated to a cement clinker. The method of preparing the composition for manufacturing light concrete includes the introduction of the reinforcing filler into Portland cement in the form of inorganic disoriented fibres and mixing until a homogeneous mixture is obtained, introduction of the GRES ash microspheres, the surface of which is preliminarily activated to the cement clinker, and the obtained mixture is tempered with water or water with a plasticising additive C3. The method includes the activation of the surface of the GRES ash microspheres by the application of a finishing agent or chemical processing. The method of light concrete manufacturing, obtained by mixing Portland cement, GRES ash microspheres and water consists in the following: the GRES ash microspheres, the surface of which is preliminarily activated to the Portland cement clinker, are preliminarily introduced into Portland cement, the mixture is tempered with water, with the application of the preliminarily activated to Portland cement clinker reinforcing filler in the form of oriented fibres in the formation of light cement, introduction of the oriented fibres is realised layer-by-layer in the process of moulding, which is carried out by layer-by-layer vibrocompacting with the further mixture exposure at 100% humidity. The invention is developed in independent and dependent claims of the invention formula.

EFFECT: obtaining constructive-heat-insulating and constructive-fire-resistant light concrete with an increased strength and with reduced moisture-absorption.

9 cl, 7 ex, 3 tbl

FIELD: construction.

SUBSTANCE: method to produce encapsulated chippings consists in application of a polymer film onto surface of chippings grains, besides, chippings are chosen from products of crushing and granulometric classification of crystalline rocks of microgranular structure, grains of chippings have spherical or ellipsoidal shape and cellular microrelief of surface with cell size of 5-50 mcm and concentration of cells of at least 80% of the area of grain surface, mixing is carried out on the flat horizontal surface in the layer of chippings with thickness of 30-70 mm at ambient temperature for 3-7 min until complete coverage of grains with polymer film and subsequent thermal treatment in drying devices until agglomeration stops.

EFFECT: increased quality of encapsulated chippings due to its more complete dyeing and coverage, reduced consumption of encapsulating substances.

6 cl, 2 dwg, 2 tbl

FIELD: chemistry.

SUBSTANCE: group of inventions relates to powder-like composition and to method of its production. Powder-like composition, which does not contain hydrocarbon X and contains as main components a) from 5 to 40 wt % of, at least, one fatty acid derivative and/or fatty alcohol derivative, which are not hydrocarbon X, b) from 0.5 to 10 wt % of, at least, one silicone oil and c) from 20 to 85 wt % of, at least, one substrate material, where components a) and b) were applied on substrate material c). Method of said composition obtaining, includes preliminary mixing of components a) and b), spraying obtained homogenised liquid mixture onto dry component of substrate material c) with obtaining product in form of powder, preferably containing not more than 1 wt % of moisture. Application of said composition as anti-foaming agent for dry mortars. Invention is developed in dependent items of invention formula.

EFFECT: improvement of coating quality, obtaining powder-like composition, suitable for application as anti-foaming agent for dry mortars.

17 cl, 2 ex, 5 tbl, 1 dwg

FIELD: construction.

SUBSTANCE: method for producing the concrete aggregate includes preparation of mass based on low-melting clays, capable to swell under conditions of heat treatment, its hydration up to 17-23%, formation of granules, melting into the surface of moulded granules of the crushed cement clinker sieved through mesh No. 5, drying, calcining at a temperature of 1100°C, cooling.

EFFECT: increase of the bond strength of aggregate with cement stone.

FIELD: chemistry.

SUBSTANCE: group of inventions relates to dry concrete or mortar composition, containing porous granules and to concrete or mortar, manufactured from said composition. Dry concrete or mortar composition, containing particles-cores, to the surfaces of which particle of hydraulic binding substance are fixed, and separate particles of hydraulic binding substance, particles-cores consist of inert or pozzolanic material and together with binding substance attached to them form porous granules, which, in their turn, are fixed to the surface of dry filling agent. Concrete or mortar, manufactured from said dry composition, mixed with water, is described. Invention is developed in dependent items of the invention formula.

EFFECT: increase of strength and fire resistance of concrete, obtained from claimed dry composition.

25 cl, 2 ex

FIELD: chemistry.

SUBSTANCE: in a method of producing a porous aggregate, which includes preparation of a ceramic casting mixture, immersing aggregate particles into the mixture, drying said particles and firing, drying is carried out to moisture content of no more than 6%, firing is carried out at temperature of 850-1200°C and the aggregate used is natural vermiculite with particle size of 5-10 mm, wherein the mixture has the following composition, wt %: natural vermiculite 20-25, clay 24-30, water 45-50, colouring additive1-5. The method includes impregnating the porous aggregate with sodium ethyl siliconate or sodium methyl siliconate, followed by drying.

EFFECT: obtaining a light-weight, high-strength decorative porous aggregate.

2 cl, 3 ex

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

Filler for concrete // 2528809

FIELD: construction.

SUBSTANCE: filler for concrete is made in the form of grain of round shape, having a cavity 3, formed by means of adhesion of two parts 1 and 2, made from clayey raw materials by moulding with subsequent baking, with a porous body 4 placed in the cavity 3, produced in process of baking of adhered parts 1 and 2 by foaming of foam glass charge including the following components, wt %: ground silicate glass 93-97 and gasifier - chalk or marble or coke 3-7, besides, at least one of parts is perforated 5.

EFFECT: production of a light strong filler having heat insulation properties, simplified technology of its manufacturing.

1 dwg, 1 tbl

FIELD: construction.

SUBSTANCE: raw mix to make a shell of a coarse filler used to decorate flower gardens and flowerbeds contains the following components, wt %: liquid glass with density of 1300-1500 kg/m3 30-35, urea 5-15, water 30-35, mineral filler 20-30.

EFFECT: making a shell suitable for application onto surface of coarse filler used for decoration of flower gardens and flowerbeds in spring and summer, with its subsequent decomposition in autumn and winter and soil fertilisation.

1 tbl

FIELD: construction.

SUBSTANCE: from a ceramic mass they form granules with subsequent drying and baking. Glazing suspension is applied onto surface of granules, where they add fine quartz sand and/or fine corundum sand in the amount of 5-30% of its mass. The layer of glazing suspension is melted.

EFFECT: increased adhesion of haydite gravel with glazing coating to cement stone.

1 tbl, 3 ex

FIELD: construction.

SUBSTANCE: granulated composite filler for silicate wall products with size of 0.5-10.0 mm, comprising a core and a shell, where the core is produced by granulation of the mixture of jointly ground tripoli and sodium hydroxide to specific surface of 150-250 m2/kg, at their mass ratio of 0.70-0.95:0.05-0.30 with a binder - an aqueous solution of sodium silicate with density of 1.2-1.3 g/cm3 in the amount of 0.1-7.0 wt % of the mixture, and the shell is formed on the surface of the core by its rolling by a dry powdered mixture of jointly ground burnt lime and sodium fluosilicate at the mass ratio of 0.85-0.95:0.05-0.15, with subsequent hardening to strength of at least 2.1 MPa, and when after specified rolling they additionally spray 40% aqueous solution of glyoxal in the amount of 1.0-7.0 wt %. (per 100% substance) of the mass of shell components. The silicate wall product characterised by the fact that it contains the above granulated composite filler.

EFFECT: reduced heat conductivity of silicate products and increased water resistance.

2 cl, 1 ex, 1 tbl

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