Raw mixture for manufacturing gypsum items. RU patent 2375327.

FIELD: construction industry.

SUBSTANCE: raw mixture for manufacturing gypsum items includes the following, wt %: gypsum 64-74; fibrous filler-flakes of capron fibres from 10-1000 ultimate fibres 1-50 mm long 0.5-1.5; calcium lignosulphonate 0.5-1; vinyl acetate polymer 0.1-0.2; bitumen emulsion 0.1-0.2; amylose 0.1-0.2; water 23.0-34.6.

EFFECT: improving strength of gypsum products.

1 tbl

IPC classes for russian patent Raw mixture for manufacturing gypsum items. RU patent 2375327. (RU 2375327):

C04B28/14 - containing calcium sulfate cements

C04B111/20 - LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS (devitrified glass-ceramics C03C0010000000); REFRACTORIES (alloys based on refractory metals C22C); TREATMENT OF NATURAL STONE

Another patents in same IPC classes:

Method for manufacturing of gypsum products / 2375172
Invention is related to the field of production of construction items on the basis of gypsum. Method for manufacturing of gypsum products includes preparation, batching and mixing of gypsum, water and fibrous filler, placement of mixture between two sheets of fibrous material, hardening. Prior to placement of mixture at least in one of sheets, bundles of fibres are introduced with length of 10-15 mm to create a hard brush that contacts to opposite sheet.

Ready-to-use composition of hardening type and set relating thereto / 2369577
Composition meant for interior and exterior architectural work consists of water, burnt plaster and setting inhibitor chosen from the group consisting of polyacrylic acid, polyacrylic acid salt and their combinations, where the composition mass ratio of water to burnt plaster is approximately 0.15 to approximately 0.5, molar weight of the setting inhibitor is about 1800 dalton to about 4500 dalton, the composition viscosity is about 5000 centipoises to about 48000 centipoises; and the above composition comprises connected matrix of hardened plaster when being mixed with the activating agent of calcium sulphate interracting with water thus obtaining hardened plaster. The invention also refers to the set which includes the components packed separately. One of them is the composition containing burnt plaster and polyacrylic acid and/or its salt, and water (optional). The other one is activating agent which, when being mixed with the above composition, contributes to its setting.

Raw mix / 2368587
Raw mix that contains β-semi-hydrate of calcium sulfate, calcium-containing residue of radio engineering production waste waters dried down to permanent mass, and water, additionally contains modifying additive with specific surface of 500 m2/g, produced by joint grinding of glauconite sand with content of SiO2 87% and superplasticiser C-3 in amount of 1% from mass of sand, at the following ratio of components, wt %: β-semi-hydrate of calcium sulfate 55-57, calcium-containing residue of radio engineering production waste waters 5-6, specified additive 10-15, water - the rest.

Mass for production of gypsum boards / 2368586
Mass for production of gypsum boards includes the following components, wt parts: water 680-720; waste paper 17-19; calcium sulfate dihydrate or phosphogypsum 83-87; urea-formaldehyde resin 4.8-5.2; starch 1.6-1.8; dust from processing of bast fibres 6-8.

Raw mix for making of partitions / 2364577
Invention is related to the field of construction and may be used in production of piece partitions. Raw mix for production of gypsum partitions contains the following components, wt %: gypsum binder 35.4-40, water - 45-55, spent catalyst of isoprene-butadiene production - K-5 - 3.5-7.5, hydrophil additive - the rest.

Acoustic panel comprising interlaced fixed matrix from hardened gypsum and method of its making / 2360883
Method for continuous manufacturing of acoustic panel includes stages, at which the following actions are realised: preparation of mixture that contains water and burnt gypsum; addition of foaming agent into aqueous mixture of burnt gypsum; mixture pouring with creation of continuous tape; tape maintenance under conditions sufficient for burnt gypsum to create interlaced fixed matrix from hardened gypsum; tape cutting with creation of precursor of moist acoustic panel; and drying of moist acoustic panel to obtain acoustic panel, in which acoustic panel is characterised by value of normal accidental sound absorption equal to at least 0.32, in accordance with modified ASTM E 1050-98. The following are also characterised: the second version of method for manufacturing of acoustic panel and versions of manufactured panels.

Sculpture material / 2358940
Sculpture material contains the following components, wt %: gypsum 30-40; water 18-26; crushed shell rock 34-52.

Decorative tileboard and mixture used for manufacture thereof (versions) / 2355852
Invention refers to decorative tileboards and mixtures used for manufacture thereof, and can be used for finishing internal and external wall surfaces of domestic and industrial buildings, and road and pedestrian way pavements. Tileboard is rectangular with a relief on face side, which has a texture similar to natural or artificial stone, and has average thickness of 20-45 mm. As per the first version tileboard is made from mixture containing the following, wt %: portland cement 28.5-35.7; shungite sand with particle size of 0.1-5.0 mm 49.5-58; superplasticising agent C-3 0.025-0.029; water-repellent agent 0.032-0.033; and water - the rest. As per the second version tileboard is made from mixture containing the following, wt %: hemihydrated α- or β-shaped calcium sulphate 30.0-33.2; shungite sand 49.4-52.6; superplasticising agent C-3 0.031-0.042; hydrated lime 0.040-0.045, and water - the rest.

Concrete finisher / 2344103
Invention refers to concrete finishers and flattener composition. Concrete finisher contains, wt %: mineral white 55.0 - 62.0, glycerine 0.1 - 1.0, hydrated lime 5-7, methyl polysiloxane 0.1 - 1.0, water - the rest.

Method of manufacturing of plaster products / 2342343
Invention concerns production technique of building materials and can be used at obtaining of wall structural material. In the method of manufacturing of plaster products by mixture of the technogenic two-water plaster levigated to a specific surface of 3000 cm2/g and 9000 cm2/g, with the additive of slaked lime and water at their following parity, accordingly, wt %: the two-water plaster levigated to a specific surface of 3000 cm2/g, 37.9325 - 40.3325, the two-water plaster levigated to a specific surface of 9000 cm2/g, 48 - 50.4, water with the additive of slaked lime the rest, with the subsequent pressing, after product pressing dry up to constant mass then maintain them within 15-20 minutes in a water solution of polyvinyl spirit concentration 5 - 10 % and repeatedly dry up to constant mass. The invention is developed in dependent points of the formula.

Putty / 2375326
Putty includes the following, wt %: cement 61.37-65.75, clay 2.0-3.0, water 30.0-34.0, lime glue 1.0-1.4, carboxymethyl cellulose 0.03-0.05, and superplasticising agent C-3 0.6-0.8.

Method of making heat-resistant concrete / 2374209
Invention relates to the industry of construction materials and can be used in making construction objects and structures from heat-resistant concrete. The method of making heat-resistant concrete involves batching filler and binder components, stirring them, moulding objects and hardening, with subsequent ageing. The filler used is waste ash-slag mixture from Irkutsk thermal power plant 6 in Bratsk with packed density ρ=1250 to 1330 kg/m3, moisture 3 to 4%, consisting of 20 to 47% broken slag with particle size of 5 mm and 80 to 53% slag sand with fineness modulus of 4.41 to 3.57, with the following ratio of fractions, %: 5 mm fraction - 20.0 to 47.0, 2.5 mm fraction - 10.0 to 26.6, 1.25 mm fraction - 11.0 to 11.2, 0.63 mm fraction - 9.0 to 23.0, 0.315 mm fraction - 2.0 to 9.0, 0.14 mm fraction - 7.8 to 11, less than 0.14 mm fraction - 2.2 to 10. Ash alkaline binder is used, consisting of field I flue ash, obtained from burning brown Kansko-Achinsky coal at thermal power plant 7 in Bratsk Irkutsk region, and liquid glass from multitonnage wastes from ferrosilicon production at the ferro-alloy-microsilica Bratsk factory with packed density of 230 to 245 kg/m3 and containing fine crystalline graphite particles and β-modification of silicon carbide in amount of 10 to 13%, with silica modulus n=1 and density ρ=1.33-1.41 g/cm3, with the following ratio of components, wt %: said flue ash 17.2 to 40.3, said liquid glass 19.8 to 31.2, said slag sand 10.3 to 24.1, said broken slag 27.2 to 41.0. Objects are moulded at pressure 1 to 5 MPa. Solidification takes place in a stream treatment chamber at 80°C in a 2+3+3+3 hour mode with subsequent holding steamed objects from which forms have been removed for 30 to 60 days at ambient temperature of 20 to 25°C.

Raw mixture for making heat resistant concrete / 2374203
Invention relates to a composition of raw mixture for making heat-resistant concrete. The raw mixture for making heat-resistant concrete contains, wt %: aluminium-chromium phosphate binder 15 to 18, electromelted corundum 18 to 26, technical alumina 37 to 41, blast-furnace slag 9 to 15.5, wastes from limestone sawing 4 to 10, mixture of silicon and sodium nanoparticles SiO2 and Na2O 1.5 to 2.5.

Composition and method of making unfired quartzite heat-resistant concrete / 2374202
Invention relates to the industry of construction materials and can be used in making objects from quartzite heat-resistant concrete, obtained without precalcination 1. The composition for making unfired quartzite heat-resistant concrete contains, wt %: quartzite filler 70 to 91, fine quartzite 6 to 20, sodium silicate lumps in form of nanoparticles 1 to 4, fine dolomite 2 to 6, water in terms of B/T 0.12 to 0.14. The method of making unfired quartzite heat-resistant concrete from the said composition involves converting sodium silicate lumps into nanoparticles through dehydration dispersion of hydrated sodium silicate lumps finely ground to specific surface area of 2500 to 3000 cm2/g at temperature ranging from 200 to 600°C, mixing quartzite filler, fine quartzite and dolomite with addition of an aqueous mixture of sodium silicate lumps in form of nanoparticles at temperature ranging from 80 to 90°C while stirring, and then water at temperature ranging from 80 to 90°C, stirring the obtained mixture, moulding objects from the mixture and treatment of the object with thermal shock at temperature ranging from 250 to 300°C for 1 to 2 hours.

Raw mixture for making heat-resistant ash-slag concrete / 2374200
Invention relates to the industry of construction materials and can be used in making structures and objects from heat-resistant concrete based on ash-slag filler and allows for efficient use of multitonnage industrial wastes. The raw mixture for making heat-resistant ash-slag concrete contains, wt %: 35.0 to 60.0 filler - dump ash-slag mixture from Irkutsk thermal power plant 6 in Brask, from burning brown coal from KATEK Irsh-Borodin open-pit coal mine with packed density of the ash-slag mixture ρpack=1350-1400 kg/m3, consisting of 10% ash and 90% slag, with particle size from 0.315 to 5.0 mm and moisture from 2 to 3% with the following fractions in the given ratios, %: 5 mm fraction - 22.44, 2.5 mm fraction - 29.56, 1.25 mm fraction - 12.44, 0.63 mm fraction - 25.56, 0.315 mm fraction - 10.0, and binder from flue ash from burning brown coal from Kansko-Achinsky thermal power plant 7, Bratsk field 1 with ρpack=800-850 kg/m3 and sieve No.008 residue - 6.7%, 17.8 to 38.9, and liquid glass from wastes from production of ferrosilicon at the Bratsk ferro-alloy - microsilica production factory with ρpack=230-245 kg/m3 and containing fine grained crystalline impurities in form of graphite and β-carborundum in amount ranging from 10 to 13%, with silica module n=1 and density ρ=1.32-1.35 g/cm3, 20.0 to 30.2.

Raw mix for production of nonfired items / 2373167
Raw mix for production of nonfired pressed construction items contains the following components, wt %: limestone with particle size of not more than 5 mm - 65-86, Portland cement with grade not below 400 - 5-9, cement dust - 5-30.

Construction mortar / 2373166
Construction mortar comprises the following components, wt %: Portland cement 26.18-32.18, aluminous cement 3.76-4.56, dolomitised limestone with size of 100 micron - 7.34-9.34, sand for construction works with fraction from 0 to 0.63 mm - 37.3-38.3, superplasticiser C-3 1.88-2.48, magnesium sulfate 1.37-1.97, water 16.17-17.17.

Complex additive for concrete mix / 2373165
Complex additive contains product of alkylation of phenol production wastes on the basis of cumylphenol and dimers of α-methyl sterol with oxygen-containing organic substances, sodium sulfate and sodium formate at the following ratio of components, wt %: product of phenol production waste alkylation on the basis of cumylphenol and dimers of α-methyl sterol with bifunctional oxygen-containing organic substances - 70.0-80.0; sodium sulfate - 8.0-12.0; sodium formate -12.0-18.0.

Method for manufacturing of coarse filler for concretes / 2372304
Invention is related to the field of fillers production for concretes. In method for making of coarse filler for concretes, including: application of cement dough layer onto surface of filler grains with its further hardening, crumb of porous silicate material with fraction of 0.5-5 mm is applied onto layer surface prior to its hardening.

Concrete mixture / 2371416
Invention relates to the industry of construction materials, particularly to production of concrete wall blocks. The concrete mixture contains the following, wt %: portland cement 23.0 to 27.0; ash-slag filler with the following chemical composition, wt %: SiO2 40.7, Al2O3 15.8, Fe2O3 13.5, CaO 8.9, MgO 4.3, Na2O+K2O 3.8, SO3 1.4, "п.п.п." 8.5 and particle composition, wt %: larger than 0.63 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, foam polystyrene crumbs with particle size of 10 mm - 1.5-2.0, superplasticiser C-3 30.25 to 0.35, water - 10.0 to 13.0.

Method for production of concrete plasticizer from distillery dreg / 2243950
Method includes centrifugal preseparation of distillery dreg to provide concentrate, treatment obtained concentrate with alkali carbonate to pH 8-11, followed by addition of superplasticizer or lignosulfonate solution providing ratio of total amount of alkali carbonate and concentrate to amount of solution ‹1. Superplasticizer or lignosulfonate solution is added to obtained centrifuge effluent, providing ratio of centrifuge effluent to said solution from 0.2 to 2.0 to produce another plasticizer. Dry alkali carbonate content is not more than biomass content in raw distillery dreg. Method of present invention is useful in concrete mixtures manufacturing for producing of precast concrete and cast-in-place constructions.