Composition of haydite-concrete mixture
SUBSTANCE: composition of a haydite-concrete mixture includes, wt %: portland cement 18.87-21.34, haydite 41.13-41.56, superplasticiser LSTM 0.0312, fly ash of TPP 13.92-18.87, gasifying additive PAK-3 0.022-0.025, water - balance.
EFFECT: production of haydite concrete with higher strength and reduced density.
The invention relates to the construction materials industry, in particular the production of lightweight expanded clay concrete for low-rise construction.
Famous concrete mix for the production of lightweight concrete (Patent No. 2379265, IPC C04B 38/08, publ. 20.01.2010)containing, wt.%: cement 21,0-23,0; clay 26,0-28,0; water 14,0-18,0; shungite dust 31,0-39,0.
The disadvantage of this mixture is the low strength.
Famous concrete mixture (Patent No. 2449971, C04B 38/08, publ. 10.05.2012) containing, wt.%: Portland 23,0-25,0; expanded clay fraction of 10-20 mm 4,5-5,5; clay sand 20,0-23,0; saponified rosin 0,001-0,0012; clay ground 13,0-18,0; water - the rest.
The disadvantage of this mixture is insufficient durability, increased density, reduced thermal properties.
Closest to the invention is a concrete mixture for the production of building blocks for low-rise construction (Patent # 2440943, IPC 04B 28/04, C04B 111/20, publ. 27.01.2012)comprising, wt.%: Portland 21,0-24,0; expanded clay gravel 27,0-31,0; clay sand 5,0-7,0; saponified rosin 0,001-0,0012; superplasticizer C-3 0,9-1,3; ground-glass 18,0-20,0; water - the rest.
The disadvantage of this concrete mixture is reduced strength and increased density.
The technical result is to obtain a concrete mixture with povyshen the th strength and low density.
The technical result is achieved by the fact that the composition of the concrete mixture comprising Portland cement, lightweight aggregate, superplasticizer LSTM, water, according to the invention, further comprises fly ash of thermal power plants, and gas-forming additive PACK-3 in the following ratio, wt.%:
the clay 41,13-41,56;
superplasticizer LSTM 0,0312;
ash CHP 13,92-18,87;
razobratsya additive PAK-3 to 0.022-0.025;
water the rest.
Ash CHP is a fine powder with fineness of 2500-3000 cm2/g, a bulk density of 780 kg/m3the true density of 2300 kg/m3, humidity 17%, loss on ignition of 4.8%.
Grain composition of fly ash CHP wet removal are presented in table 1.
|Grain composition of fly ash CHP|
|The size of the holes of the sieve, mm||Private residues on the sieves, %||Full residues on the sieves, %|
|0,63td align="center"> of 1.57||6,28|
|less 0.14||72,25||of 99.98|
The fineness modulus of fly ash CHP - Mkr=0,48.
The chemical composition of fly ash CHP are presented in table 2.
|The chemical composition of fly ash CHP|
|Name of the power plant||SiO2||Al2O3||Fe2O3||CaO||FeO||MgO||K2O||SO3||SiO2+Al2O3+FeO|
Ash CHP in the composition of the concrete mixture performs the role of fine aggregate and fills the emptiness of the clay. Spherulites fly ash CHP create additional closed porosity fine aggregate, reducing overall open porosity structure is an artificial construction conglomerate. Reduced open porosity leads to a decrease in water absorption of the material and to increase the strength of artificial conglomerate.
Superplasticizer LSTM is a product of wood processing pulp sulphite method carbide and water-soluble resin. Thick, viscous dark brown liquid, soluble in water. Introduction superplasticizer reduces the water requirement of a mixture of about 15% and increases the strength of concrete.
Additive PAK-3 - powder aluminum contact is a silver fine powder. It is soluble in acid and alkali solutions. Is introduced into the concrete mixture in the form of a suspension in water required for mixing concrete mixture.
Introduction to the composition of the concrete mixture gas-forming additives PAK-3 leads to the interaction of the aluminum powder with formed during the hydration of tricalcium silicate calcium hydroxide. As a result of reaction formed in dorog, which, standing out, pariset matrix of the concrete mixture and reduces the density of the concrete mixture.
With the resulting pores have an optimal structure with a uniform distribution of pores in the form of a polydisperse in size, closed, deformed in the right polyhedra with glossy surface preparepage layer, separated by a thin, but strong and of the same cross-section interporous partitions (an Additive in concrete and mortars: training Handbook / LI Kesternich. - Rostov-on-don: Phoenix, 2007).
Formed uniformly distributed pores reduce the density of the concrete mixture and increase the heat insulating ability of the concrete mixture.
Preparation of concrete mixture is performed in a forced action mixer. The clay is mixed with 30% of the water required for mixing concrete mixture in the mixer for 120 seconds, then add the ash CHP and Portland cement.
Superplasticizer LSTM and gas-forming additive PAC-3 is introduced into the rest of the water required for mixing concrete mixture, and intensively stirred. Next, water with additives injected into the mixer and stirred for 180 seconds. From ready-mix form patterns that harden 28 days.
The composition of concrete mixtures are given is in table 3.
|The composition of concrete mixtures|
|Composition No. 1||Composition No. 2||Composition No. 3|
|The strength of claydite-concrete in compression, MPa||not less than 5.0||not less than 5.0||not less than 5.0|
The strength of claydite-concrete in compression, MPa
|not less than 3,0||not less than 3,0||not less than 3,0|
Thus, the introduction of the concrete mixture of fly ash CHP leads to the optimization of the first space claydite-concrete, reducing large intergranular vacuum in the structural frame of claydite-concrete, while the absence of large capillary pores increases the strength of claydite-concrete. In addition, the introduction of additives PAK-3 pariset the cement matrix, in which there are small closed pores, practically does not affect the strength of claydite-concrete, but significantly reduces the density and increases the insulating properties of claydite-concrete.
The composition of the concrete mixture comprising Portland cement, lightweight aggregate, superplasticizer LSTM, water, characterized in that it further comprises fly ash of thermal power plants, and gas-forming additive PACK-3 in the following ratio to the of mponents,
|gas-forming additive PAK-3||to 0.022-0.025|
SUBSTANCE: swollen perlite is used, which is first saturated with water, water that is not retained by a swollen perlite granule is filtered, the water-saturated perlite is mixed with gypsum, the produced mix is supplied into a die mould for further pressing, and pressed at 10 MPa at least.
EFFECT: increased strength of a finished product with increased time of mortar hardening.
SUBSTANCE: raw mix for making foam concrete includes, wt %: portland cement 35.0-37.0, foaming agent PB-2000 0.25-0.35, TPP ash 10.65-13.25, crushed foam glass of fraction 5-10 mm 20.0-25.0, mineral wool ground and sifted through sieve No. 2.5 1.0-1.5, haydite sand 5.0-7.0, water 21.0-23.0.
EFFECT: higher heat resistance of foam concrete produced from raw mix.
SUBSTANCE: raw mixture contains the following components, pts. wt.: non-caking acid clay 58.0-61.0; expanded perlite ground to specific surface of 4500-5000 cm2/g 13.0-15.0; chalk stone 1.0-2.0; broken silicate glass ground to specific surface of 4500-5000 cm2/g 14.0-16.0; bentonite and/or kaolin 4.0-6.0; liquid potassium glass 4.0-6.0.
EFFECT: increase of product water-resisting property.
SUBSTANCE: raw mixture for manufacture of foam concrete contains the following components, wt %: Portland cement 35.0-37.0, foaming agent PB-2000 0.25-0.35, TPP ash 15.65-20.25, crushed foamed glass with particle size of 5-10 mm 20.0-25.0, asbestos fibre cut into 5-15 mm pieces 1.0-1.5, and water 21.0-23.0.
EFFECT: improving heat resistance of foam concrete obtained from raw mixture.
SUBSTANCE: invention relates to construction materials, in particular to manufacturing products from ethynol perlite concrete, applied for heat insulation of heat pipelines of heat networks and for manufacturing heat-insulated pipes of full operational readiness with monolithic thermohydroinsulating protection. Ethynol perlite concrete, obtained from composition, which contains perlite gravel with filling agent from inert materials; as such used are dust-like asbestos in form of powder in amount 0.2 ppm, expanded clay aggregate dust in amount 0.2 ppm, and fly ash of thermal power stations in amount 0.2 ppm, and composite cement in form of ethynol enamel based on ethynol varnish in amount 1 ppm and plasticiser, represented by latex SKS-65 in amount 0.1 ppm, and as accelerator of composition polymerisation used is intensive ultraviolet radiation.
EFFECT: increased quality of ethyl perlite concrete due to reduction of water absorption, heat conductivity coefficient, increase of water resistance and acceleration of hardening.
SUBSTANCE: gypsum perlite contains a gypsum binder, such as a processed mechanically activated phosphogypsum ground to 5-40 mcm (active gypsum), hydrophobizated swollen sand, superplasticiser Melflux at the following ratio of components, wt %: active gypsum - 84.8-93.8%, hydrophobizated swollen perlite sand - 6-15%, superplasticiser - 0.2%.
EFFECT: improved heat insulation and strength properties at low prime cost.
FIELD: process engineering.
SUBSTANCE: invention relates to production of construction materials and can be used for fabrication of ceramic bricks, stones and blocks. Proposed method comprises preparation of foam-ceramic mix from clay stock, water, foaming agent, binding agent, drying, annealing and forming. Note here that, additionally, foaming agent PB-2007 is admixed as a plasticising agent while finished product ground to 1.25-5.0 mm fraction or perlite sand are used as binding additive. Then, obtained mix is poured in flat moulds and dried, first, at 30-35°C and, then at 50-56°C to make an integral blank to be withdrawn from the mould, annealed at 800-1600°C and formed to blocks.
EFFECT: higher heat- and noise-isolation properties, decreased weight.
SUBSTANCE: invention relates to construction materials, in particular to polystyrene concretes, used in heat-preserving protective structures of buildings and constructions. Heat-insulating constructive polystyrene concrete with density 225-350 kg/m3, is obtained from mixture, which contains Portland cement, water, complex air-involving and plasticising additive of multifunctional action, which represents balanced mixture in dry or liquid form, consisting of air-involving additive PO-01B based on products of oxidation of food industry wastes and plasticiser of polycarboxilate type or sulfonated product of polycondensation of melamine with formaldehyde with number of links in molecular chain equal 18-27 with weigh ratio: air-involving additive:plasticiser, equal 1:(0.25-0.5), and specific consumption of said complex additive 0.06-0.15 wt % of Portland cement weight, polystyrene foamed granulated (PFG) with volume content in polystyrene concrete - φ in the range 0.40-0.60, obtained after triple foaming of initial polystyrene beads with coarseness 0.7-1.0 mm and characterised by complex dimensionless index of PFG quality - n in the range 1.5-1.75, whose values are determined in the process of designing polystyrene concrete composition by formula: where K1 and K2 are coefficients, reflecting peculiarities of technology of PFG obtaining, values of which are respectively in the range1.1-1.3 and 8.0-10.8; db is the average diameter of initial polystyrene beads, mm; dav is average weighted diameter of PFG granules, mm;
EFFECT: creation of heat-insulating constructive polystyrene concrete with density 225-350 kg/m3 with optimal properties: increased strength and heat-insulating properties.
3 ex, 1 tbl
SUBSTANCE: heat-insulation structural masonry admixture based on a light filler contains, kg/m3: portland cement CEM1-42.5N 173-346, quartz sand from Razumenskoe deposit 700-1260, hollow microspheres of Novocherkasskaya regional power station 50-250, a water-retention additive Mecellose FMC 24502 0.1% of the portland cement mass, water - balance, besides, percentage content of light filler - specified microspheres - is given from the volume of sand.
EFFECT: reduced heat conductivity.
1 ex, 3 tbl
SUBSTANCE: crude mixture for making claydite gravel contains the following, wt %: montmorillonite clay 65.0-75.0, andesite powder 15.0-20.0, scrap sheet glass ground until passage through sieve No 014 10.0-15.0.
EFFECT: high strength of the claydite gravel.
SUBSTANCE: invention relates to structural materials and specifically to compositions for producing foam concrete and articles based thereon, which can be used in industrial and civil engineering. The crude mixture for producing foam concrete contains, wt %: portland cement 8.9-10.5, unslaked lime 41.4-43.8, process additives - dry wastes from cutting foam concrete blocks, aluminium powder and a surfactant - superplasticiser Relamix PK 8.97-9.8, multilayer carbon nanotubes, the surface of which is chemically functionalised with oxygen-containing groups 0.0003-0.03, water 35.881-40.7297, wherein said nanotubes are added to the surfactant - superplasticiser Relamix PK, followed by ultrasonic treatment of the obtained suspension with said nanotubes. The invention is developed in subclaims.
EFFECT: obtaining foam concrete with improved strength and heat-insulation properties.
3 cl, 2 dwg, 1 tbl, 1 ex
SUBSTANCE: invention relates to the construction industry and can be used to make autoclave-cured heat insulation, structural-heat insulation and structural articles. The crude mixture for making autoclave-cured cellular articles contains, wt %: high-calcium lump quicklime 5-12, portland cement 7-14, ground quartz sand 38-51, aluminium paste 0.03-0.12, binder consisting of pre-slaked lime with an additive of ground gypsum dihydrate in amount of 0.05-0.25% (with respect to the hemihydrate) 15-25%, water (more than 100% dry components) in an amount which corresponds to the water/solid (W/S) ratio of 0.5-0.6.
EFFECT: high quality of structural materials with a cellular structure, low water consumption in the crude mixture, shorter time for ageing the raw material before autoclave treatment.
1 ex, 2 tbl, 2 dwg
SUBSTANCE: composition of a crude mixture for making naturally hardening, non-autoclaved foamed concrete contains, wt %: portland cement 63.03-66.06, synthetic foaming agent 0.15-0.21, gasifier containing 80% active aluminium with particle size not greater than 100 nm and 20% polyethylene glycol, 0.68-0.74, water 33.04-36.07. The composition further contains a modifying nanocrystalline additive- corundum in amount of 0.02-0.3 wt % of the weight of portland cement. The method of producing the composition according to claim 1 involves feeding and stirring in a mixer, first the foaming agent with a portion of water and portland cement and then a suspension of said gasifier and a portion of water into the obtained mass while stirring. The modifying nanocrystalline additive - corundum in amount of 0.02-0.3 wt % of the weight of portland cement then added to said suspension.
EFFECT: high strength with low density and heat conductivity, obtaining foamed concrete with an optimised pore structure.
4 cl, 2 ex, 7 tbl
SUBSTANCE: invention relates to production of building material and can be applied in production of artificial porous fillers for light concretes and heat-insulating fillings. Raw material mixture for obtaining porous filler includes silica-containing rock and gas-former, as gas-former, it contains mixture of aluminium oxide and silicon carbide with the following component ratio, wt %: silica-containing rock - 95.0-96.0, aluminium oxide 3.0-4.9, silicon carbide 0.1-1.0.
EFFECT: increase of porous filler strength by reduction of filler agglomeration with reduction of its water-absorption and heat-conduction.
4 ex, 1 tbl
SUBSTANCE: raw mix for preparation of frost resistant wall building stones and monolithic walls, including a binder, a filler - an ash and slag mixture, a foaming agent, a chemical additive - Relamix. Type 2, calcium carbide, the binder used is represented by the following components jointly ground to the size of less than 250 m2/kg: an ash and slag mix from burning of coal in furnaces of a boiler house or a thermal power plant cooled by dry method, a hardening activator - alkaline reagents of sodium or potassium, or carbonates of these metals or lime or mixtures of the specified reagents, and calcium sulfate dihydrate, and the filler is an ash and slag mixture from burning of coal in furnaces of a boiler house or a thermal power plant, cooled by the dry method, and clay, and additionally the mixture contains spent engine oil, at the following ratio of components, wt %: specified ash and slag mixture for a binder 14-19, specified activator of hardening 3-6, specified calcium sulfate dihydrate 4-6, foaming agent 0.3-0.6, Relamix. Type 2 0.1-0.2, calcium carbide 0.5-4.0, clay 5-10, spent engine oil 0.2-0.4, specified ash and slag filler - balance.
EFFECT: improved frost resistance of products from the proposed mix.
1 ex, 1 tbl
SUBSTANCE: raw mix contains the following components, wt %: argillites - 69.0-74.8; diopside-containing rock - 10-15; crushed glass - 9.5-10.5; building gypsum - 4.92-5.1; alumnium powder - 0.58-0.6; sodium hydroxide, 2H solution - 29.6-30.0% above 100%, of dry mixture, V/G - 0.42-0.45.
EFFECT: increased strength of porous items with preservation of their density and temperature of annealing.
SUBSTANCE: raw mix for fabrication of gas concrete includes the following components, wt %: portland cement 140 - 150, lime 140 - 150, marshalite 480 - 520, gypsum 0.5 -1, aluminium powder 2.5 - 3, superplasticiser S-3 0.3 - 0.5, water 480 -520.
EFFECT: reduced time of autoclave treatment, increased strength of products from gas concrete.
SUBSTANCE: invention relates to production of heat-insulating foamed building materials. Finely ground rock is mixed with mineral binder, correction additives, a foaming agent and water. The rock used is gaize, the mineral binder is slag-portland cement, the stabilising additive is a mixture of polyacrylamide gel and carbamide-formaldehyde liquid, taken in ratio of 1:1, and the fluxing agent is low-melting frit. The foaming agent is foaming agent PO-6TS or PB-2000. Before mixing, the gaize and frit are ground to specific surface area of 3500-4000 cm2/g. The stabilising additive is used to prepare foam. The moulded articles are fired at temperature of 950°C. Components of the initial mixture are in the following ratio, wt %: rock - 45.5-47.0; mineral binder - 6.5-7.0; stabilising additive - 0.8-0.9; fluxing agent - 15.0-17.0; foaming agent - 0.6 5-0.7; water - the balance.
EFFECT: low heat conductivity and sorption moistening, high strength and wider raw material base for producing foamed glass-ceramic articles.
SUBSTANCE: invention relates to structural materials, specifically to formation of pores in gypsum mixtures, and can be used in the industry of structural materials. In the method of preparing a gas-forming agent for formation of pores in gypsum mixtures, involving mixing calcium carbonate, aluminium sulphate and water, a prepared salt solution consisting of aluminium sulphate and water is mixed with calcium carbonate which is ground to specific surface area of 250-280 m2/kg, with the following ratio of dry components, wt %: aluminium sulphate 30-35.7, calcium carbonate 64.3-70.
EFFECT: obtaining foamed gypsum of low density and heat-conductivity.
SUBSTANCE: invention relates to the industry of building materials and specifically to production of foam concrete. The method of producing a crude mixture for making foam concrete involves preparing a dry mixture from 500 DO portland cement and quartz sand, which is pre-dried and ground to specific surface area of not more than 2400 cm2/g, and simultaneously mixing with said portland cement in a mechanical activator, structuring water and adding a modifying additive - a combination of aluminosilicate microspheres and one- or multi-layered carbon nanotubes in ratio of 1:10, adding the obtained aqueous solution to the dry mixture and mixing for 5 minutes, adding aluminium powder, caustic soda and mixing for 3 minutes, with the following ratio of components, wt %: 500 DO portland cement 20-75, quartz sand 20-75, said modifying additive 0.1-6.0, aluminium powder 0.007-0.5, caustic soda (per dry substance) 0.0005-0.005, water - the balance. In the method of producing a crude mixture for making foam concrete, polypropylene or metal fibre can be added to the mixture in amount of 0.003%.
EFFECT: high safety of producing the crude mixture, high strength and frost-resistance of foam concrete.
2 cl, 1 ex, 3 tbl
FIELD: building material technology, in particular heat-retention concretes.
SUBSTANCE: cellular concrete mixture contains (mass %) Portland cement 15-30; lime 15-20; aluminum powder 0.03-0.10; silica component (e.g. ground quartz sand) 30-42; alkali inverted slurry, obtained from technological waste from green body cutting, 15-20, gypsum 1.5; and balance: water. Claimed mixture is obtained by preparation and mixing in blender of Portland cement, lime, aluminum powder, ground quartz sand, alkali inverted slurry. In this method slurry is outwashed with water into vessel wherein constant mixing and dispersion are carried out, charged in blender, dosed and mixed with other components in following sequence: ground quartz sand, said alkali inverted slurry, Portland cement, lime, additionally gypsum, aluminum powder. Optionally part of alkali inverted slurry is fed from vessel into slime bath for further agitation and homogenizing.
EFFECT: cellular concrete with improved physical and technical characteristics; stimulation of production process; decreased cost of product.
2 cl, 1 tbl, 1 ex, 1 dwg