Method to manufacture protective weighting concrete coating of pipeline
FIELD: technological processes.
SUBSTANCE: invention relates to piping, namely, to materials applied onto the outer surface of pipes as a protective weighting coating. In the method to manufacture a protective weighting concrete coating of a pipeline, including mixing of cement, filler, plasticising additive and water, injection of the produced mix into the annular space created by the outer surface of the pipeline and a leave-in-place form installed on it with a gap, hardening of the produced coating, portland cement is supplied for mixing with account of its content in the mix from 8.8 wt % to 20.0 wt %, water is introduced in terms of water to cement ratio from 0.31 to 0.63, plasticising additive supplied for mixing is a plasticising agent and a defoaming agent in the amount of 1.0 kg/m3 to 3.0 kg/m3, the filler supplied for mixing with grain size not exceeding 10 mm is selected from barite or iron-containing ore, or gabbrodiabase, or granite in the mixture or separately, at the same time components are mixed to produce a mix having a flow index measured by flow equal to 55 - 75 cm, and the index of air content from 1% to 4% of the volume. The invention is developed in invention claims.
EFFECT: provision of density of a protective concrete material within 2600 - 3400 kg/m3.
3 cl, 2 tbl
The invention relates to pipeline engineering, namely to the materials deposited on the outer surface of the pipe as a protective concrete weight coating. Known method of preparing a ballast material for subsea pipeline, comprising mixing cement, aggregate, water and a plasticizer, wherein the filler used coarse aggregate from the group of: barite, iron or ore, or a mixture thereof, wherein the mixing is carried out in two stages: the first stage to the mixer serves from 10 wt. % to 20 wt. % specified coarse aggregate from its total, cement, water and plasticizing additive and mixing is carried out for from 10 seconds to 15 seconds, and in the second stage, the supply remaining the specified coarse aggregate in equal portions with an interval of 10 to 15 h with stirring and carry out the mixing of the components to obtain a homogeneous mixture (RU 2412393, 20.02.2011).
Known ballast material containing cement, barite ore, water and a plasticizer. As the plasticizer used polycarbamyl. In the manufacture of the ballast material use the following fractional composition of barite ore :
the coarse fraction from 5 mm to 25 mm - 8 wt. % to 16 wt. %,
the small fraction from 0.16 mm to 5 mm, from 70 wt. % to 84 wt. %,
very Melk�I fraction from 0.01 DM 160 DM from 8 wt. % to 14 wt. %
(EN 2399828, 20.09.2010).
Also known ballast material containing cement, filler, plasticizer and water. As the cement used sulphate-resistant Portland cement, as plasticizer - PCE RFE, and as filler - barite product, barite ore and ferromanganese concentrate. The material has the following ratio of components:
Portland cement - from 8.2 wt. % to 10.5 wt. %,
water - from 5.2 wt. % to 6.7 wt. %,
plasticizer, from 0.1 wt. % to 0.15 wt. %,
barite products - from 18 wt. % to 28 wt. % with a density of 3.78 kg/cm3to 3.82 kg/cm3and humidity from 0.9% to 2.1%,
barite ore - 18 wt. % to 28 wt. % with a density of 3.9 kg/cm3to 4.1 kg/cm3and humidity 2%,
iron-manganese concentrate from 25 wt. % to 45 wt. % with a density of 4.2 kg/cm3up to 4.5 kg/cm3and humidity of 4%.
The ratio of water to Portland cement is from 0.35 to 0.5.
Components of aggregate have the following particle size distribution:
to 0.16 cm - up to 5%,
from 0.16 cm to 1.0 cm, up to 25%,
from 1.0 cm to 2.5 cm to 35%
from 2.5 cm to 5.0 cm - else
(EN 2437020, 20.12.2011).
The disadvantages of the above technical solutions is not sufficiently high viscosity of the solution and the time of preservation of the mobility of the concrete mixture, which complicates the quality of the filling pipe �of prostranstva the design of pipe-in-pipe and causes the need for a process for controlling the humidity of the raw material to prevent rupture of the outer shell and delamination of the concrete mix is drenched inside the structure.
The closest to the proposed technical solution is a method of manufacturing a ballast coating on the pipeline, comprising mixing the starting components, namely, sulphate-resistant Portland cement, barite ore, a plasticizer based on polycarboxylate ether and water. To take mixing components in the following amounts:
sulphate-resistant Portland cement from 12 wt. % to 17 wt. %,
the water is from 4 wt. % to 10 wt. %,
plasticizer based on polycarboxylate ether from 0.1 wt. % to 0.25 wt. %,
barite ore - other.
And serves for mixing different fractions of barite ore in their next content (wt. %):
large from 3 mm to 25 mm - 18 wt. %,
small from 0.16 mm to 3 mm, from 70 wt. % to 85 wt. %,
very small from 0.01 mm to -0.16 mm - 7 wt. % to 16 wt. %.
Water for concrete mixes subjected to a preliminary treatment by passing it through a magnetic field, which support the tension value of from 120,000 vehicles up to 140,000 vehicles, with a speed of 0.5 m/s to 3.0 m/s, while water treatment time is not less than 2 hours (EN 2453515, 20.06.2012).
However, the known method is quite difficult to apply to obtain mixtures that tend to trap off, because the water is subjected to processing in a magnetic field, has a relatively small period of effective action that imposes things�governmental restrictions on the transit of the solution and also the behavior of such concrete mixtures with application of an external force (for example, flow of the mixture, concrete pump) subject to sharp changes.
The technical problem solved by the invention is to provide a method of manufacturing a protective concrete weight coating pipeline with high specified density with after hardening and aging of high compressive strength, which in turn allows to obtain a technical result, namely to reduce the outer diameter of pipes with protective coating ballast for underwater, underground and above-ground pads.
The claimed technical result is achieved by the claimed method of manufacturing a protective concrete weight coating pipeline, which comprises mixing cement, aggregates, plasticizer and water. The resulting mixture is injected into the annular space formed by the outer surface of the tubing and installed with a gap of a fixed timbering. The coating obtained leave to set. According to the proposed method serves for mixing Portland cement based its content in the mixture of 8.8 wt. % to 20.0 wt. %, water is injected from the calculation of the ratio of water to cement in the range of $ 0.31 to 0.63 and. As a plasticizer serves for mixing the plasticizer with the defoamer. Koli�the ETS used a plasticizer in the mixture is from 1 kg/m 3up to 3 kg/m3. Supplied to the mixing aggregate must contain a grain size not exceeding 10 mm. the Filler is selected from barium or iron-containing ore, or gabrodiabaz, or granite. The mixing of the components together or separately carried out on the basis of a mixture having the turnover rate, as measured by the blurring of the cone is equal to from 55 cm to 75 cm, and the air content from 1% to 4% by volume of the mixture. Filler applied to the mixture has the following particle size distribution:
to 0.16 mm - up to 8%,
from 0.16 mm to 1.25 mm up to 35%,
from 1.25 mm to 2.5 mm up to 37%,
from 2.5 mm to 10.0 mm - the rest.
Preferably, the plasticizer further comprises a lignosulfonate, melaninogenica and naphthalenesulfonate individually and in a mixture.
The number of plastificator must add up to 1% dry solids by weight of cement.
To obtain a mixture of the required mobility and sufficient viscosity and to avoid stratification of the amount of the plasticizer are chosen so that the resulting material, on the one hand, there was enough fluid, namely the blurring of the cone should be between 55 cm to 75 cm, and on the other hand, the air content should be between 1% to 4% by volume. Thus, the proposed method is applied� on a mixture of plasticizer, consisting of a plasticizer and a defoamer in an amount of from 1.0 kg/m3to 3.0 kg/m3mixture allows plastic concrete mass which fills all the space between the pipes and at the same time, after hardening of the concrete surface will have a high density. In plasticizing additive content of the antifoam should not exceed 50%. The increase in the content of the antifoam leads to a drastic decrease of fluidity of the concrete mix and the appearance of voids in the concrete coating that minimises the characteristics of the compressive strength of the concrete. Low content of antifoam less than 1% leads to an increase of air content in concrete mixtures and the resulting decline in the density of the concrete.
The ratio of water to cement, selected in the range of from 0.31 to 0.63 and necessary to achieve the required mobility and the strength of the concrete material. The use of water in a smaller number leads to a decrease in the mobility of the concrete and the appearance of air voids after curing, and the increase in water leads to delamination and loss of the compressive strength of the concrete.
In a further example implementation of the claimed method of manufacturing a protective concrete weight coating pipeline on the example of use as a filler barite ore, n� limits the scope of the present invention.
An example of a method
First prepare the initial components of the mixture. The process of preparation of the components of the concrete mix includes crushing of inert filler, such as barite ore to a size not exceeding 10 mm. the Use of larger fractions of filler lead to a reduction in the density of the coating. If necessary, barite ore is heated to 5°C (maximum), particularly following the melting stuck (frozen) pieces of rock to prevent separation of the ballast mixture during transportation. Then measure the humidity of barite ore. According to the results of moisture measurement specify the quantity of barite ore in the composition of the ballast material according to the formula:
where m1is the mass of barite ore with regard to humidity,
m2is the mass of barite ore in nominal recipe
W - water content, expressed as a percentage.
Barite ore is sifted through Borat for the separation of large impurities fraction. Then barite ore and Portland cement in the amount of its content in the mixture is from 8,8% to 20.0% via a system of conveyors and serves on the scales, where the components are weighed according to the specified composition. Granulometric composition of the filler are shown in Table 1, the selection of the ratios due to the reception of ballast cover with a given raft�awn.
To ensure the fluidity of the concrete mix when pouring it added plasticizing additive in an amount of from 1.0 kg/m3to 3.0 kg/m3. Plasticizer is a mixture of a plasticizer and a defoamer. And the amount of antifoam in plasticizing additive should be no more than 50%. As a defoamer can be used tributyl phosphate or anhydrous silicone semidisplacement antifoam brand Penta-4604. As the plasticizer can be any known plasticizer based on polycarboxylate or polyacrylate ester. Plasticizer may further comprise lignosulfonates, melaninogenica and naphthalenesulfonate. The above components can be used individually, in any combination that does not affect obtaining the claimed technical result. The amount of plasticizer should be no more than 1% dry matter by weight of cement.
The resulting mixture was added water from the calculation of the ratio of water to cement in the range of $ 0.31 to 0,63, and mix thoroughly. Stirring was continued until a homogeneous mixture with the blurring on the cone from 55 cm to 75 cm.
The resulting concrete mix is pumped with a concrete pump in the space between the conductive pipe and the installed fixed on�alupkoj. When assembled, the tube design is on the stand, installed at a certain angle. The injection solution is made using a special removable plugs on the end of the pipe. When you pour this design is inclined with one end lower than the other) and the fill is done from the end located below. Download concrete mix is a concrete pump to fill the entire design - to the exit of the mixture from the nozzle design cover above. After completion of the filling procedure the design of it is on display during the exposure time up to a strength of at least 5 MPa, and then stored up to the set of transport strength of not less than 22 MPa.
Depending on technological requirements in the casting of pipe construction may be used in various types of outdoor permanent formwork, for example, spiral steel shuttering may be made by the locks of outside and inside construction and can be painted or coated with various polymeric materials, which allows to obtain different characteristics of the products.
To enhance the design in the space between the pipe and fixed timbering possible location of the reinforcement (steel or polymer) in the form of bars or mesh, which is connected by welding or attached, as well as to enhance the strength �of etona perhaps the use of fibers (steel or polymer).
The inventive method allows high accuracy to provide the specified density protective concrete weight coating of the pipeline in the range from 2600 to 3400 kg/m3.
Determining the average density of the mixtures made in accordance with GOST 12730.1-78. The strength of concrete in compression was determined in accordance with GOST 10180-90.
To obtain coatings with different characteristics of density and strength can be used as placeholders not only barite, and iron ore, gardiasis, granite. These fillers can be used as separately from each other and in various combinations. Examples of compositions used in the protected way, and the resulting densities and compressive strength of the obtained coating are shown in Table 2.
When used in the composition of the combination of different fillers fractional number is crushed (prepared) for each component separately. With fine and coarse aggregate fractions are composed of the same component and in the proportions shown in Table 1.
Declared quantity supplied of initial components and, importantly, the characteristics of the resulting mixture were identified during numerous field experiments, the results of which are shown in Table 1 and Table 2. Table 1 shows the particle size distribution with�Tav fillers. The presence of small fractions of filler allows you to create conditions that reduce the delamination of the protective concrete weight of the material during the casting process.
Table 2 shows examples of various compositions of protective weight coating pipeline with the use of components of different density and the indexes of the compressive strength obtained ballast material for each composition, and provides data on the coating obtained in accordance with the prototype.
1. A method of manufacturing a protective concrete weight coating pipeline, comprising mixing cement, filler, a plasticizing component and water, the injection of the mixture into the space formed by the outer surface of the tubing and installed with a gap retained formwork, the solidification of the coating, characterized in that the mixing serves Portland cement based its content in the mixture of 8.8 wt. % to 20.0 wt. %, water is injected from the calculation of the ratio of water to cement in the range of $ 0.31 to 0.63 and, as a plasticizer additive used on the basis of polycarboxyl�atna or polyacrylate ester in an amount of from 1 kg/m
3up to 3 kg/m3the mixture serves for mixing the plasticizer defoamer supplied to mixing the filler with a grain size not exceeding 10 mm, is selected from barium or iron-containing ore, or gabrodiabaz, or granite, and the mixing of the components together or separately carried out on the basis of a mixture having the turnover rate, as measured by the blurring of the cone is equal to from 55 cm to 75 cm, and the air content of 1% to 4% vol., and fed to the mixing of the filler has the following particle size distribution:
to 0.16 mm - up to 8%,
from 0.16 mm to 1.25 mm up to 35%,
from 1.25 mm to 2.5 mm up to 37%,
from 2.5 mm to 10.0 mm - the rest.
2. A method according to claim 1, characterized in that the plasticizer further comprises a lignosulfonate, melaninogenica and naphthalenesulfonate individually and in a mixture.
3. A method according to claim 1, characterized in that the plasticizer is used in an amount up to 1% dry solids by weight of cement.
SUBSTANCE: anticorrosive coating based on a cement composition with additives of plasticiser S-3 and sugar syrup is deposited on the inner surface of pipes by shotcreting or centrifuging. The mixture further contains chamotte marl flour and aqueous calcium nitrate solution. The composition of the mixture is given.
EFFECT: invention increases resistance of the pipeline coating to varying temperature of the heat carrier in a wide temperature range.
SUBSTANCE: invention relates to cement mixtures with additives, used for anticorrosion protection of inner surfaces of steel pipes of heat and water supply systems. The composition contains the following (wt %): mineral binder 37-50, sand 32-40, polymer additive 1.5-4.5, complex mobility regulator 0.18-0.42 and water (the balance).
EFFECT: use of the disclosed composition guarantees high crack-resistance and adhesion strength of the coating of the metal surface with longevity of not less than 10 years; the invention enables to obtain coatings with the highest possible dense packing with average density of not less than 2200 kg/m3, which enables to achieve relatively high physical-mechanical characteristics of the protective layer on all disclosed quality parameters.
SUBSTANCE: method includes cleaning of a pipeline from deposits, tamping of pipeline annular space, application of a coating onto the inner surface of the pipeline. Initially an interrupting coating layer is applied in the form of half-rounds on the inner surface of the pipeline, afterwards the coating is hardened. Then the coating is applied onto the entire length of the pipeline. The method is realised with a device made of chambers connected with pipeline ends. In each chamber there is a sleeve, the front end of which is bent and forms a tight cavity communicated with the system of fluid agent supply, and the second end of the sleeve is connected with a traction device. The device is equipped with a system of mixture supply to coat the inner surface of the pipeline communicated with the pipeline cavity and arranged in front of the inverted end of the sleeve. One of the sleeves is made with identical diameter along the entire length. The second sleeve is made with the diameter equal to the inner diameter of the pipeline, along the entire length of the sleeve there are slots in the form of half-rounds.
EFFECT: application of a coating with thickness from 5 to 500 mm during recovery of a pipeline with diameter of 100-5000 mm in two stages, increased strength of the coating.
4 cl, 5 dwg
FIELD: machine building.
SUBSTANCE: pipeline sanation method involves cleaning of inside surfaces of a pipeline, formation of high-elasticity polymer coating on the cleaned surface and application of a concrete coating to it. High-elasticity polymer coating is formed by application to the pipeline inside surface of the composition that contains emulsion and is further cured. Oligomers with end isocyanate groups are disperse medium in the emulsion, and a solution or a dispersion that has been obtained as a result of mixing lime solution with content of calcium hydrate 10-70 wt %, and glycerin in the amount of 1-250 parts by weight per 100 parts by weight of calcium hydrate is a disperse phase.
EFFECT: enhancing adhesion to wet metal or concrete surfaces, reducing the thickness and improving the strength of concrete coating.
7 cl, 2 dwg
SUBSTANCE: method to prepare a concrete mixture for manufacturing of a ballast pipe includes mixing of a sulfate-resistant portland cement, heavy spar ore, a plasticising additive on the basis of polycarboxylate ether and water at the following ratio of the components, in wt %: sulfate resistant portland cement 12 -17, water 4-10, plasticising additive on the basis of polycarboxylate ether 0.1- 0.25, heavy spar ore - balance, at the following content of heavy spar ore fractions in wt %: coarse 3-25 mm 7 - 18, fine 0.16 mm - 3 mm 70 - 85, very fine 0.01-0.16 mm 7 - 16, and tempering water of the concrete mixture is previously processed, sending through the magnetic field, where intensity is maintained with the value of 120000 -140000 A/m, with the speed of 0.5 -3.0 m/s, at the same time the water treatment time makes at least 2 hours. The device for preliminary treatment of the concrete mixture tempering water for manufacturing of a ballast pipe comprises a reservoir for water storage, with inlet and outlet nozzles, and a unit of tempering water treatment, the outlet nozzle of the reservoir is connected with the inlet of the tempering water treatment unit arranged in the form of a hollow extended element, inside of which there is permanent magnet with formation of a gap with the inner wall of the hollow extended element, the value of which makes 3 -5 mm, at the same time the permanent magnet has the intensity of the magnetic field of 120000 -140000 A/m, the outlet of the tempering water treatment unit is connected to the inlet nozzle of the reservoir, the outlet of the tempering water treatment unit is connected with the inlet nozzle of the reservoir, the reservoir has an opening for water draining. The invention is developed in subclaims of the invention formula.
EFFECT: higher density of a concrete mixture and production of a concrete with increased strength.
6 cl, 2 tbl, 2 dwg
FIELD: mechanical engineering.
SUBSTANCE: device comprises chambers with sleeves ends of which are unbent and fixed on the perimetre of the pipeline. Cavities formed by the unbent sites of the sleeves are connected with fluid agent supply systems. The drums are mounted out of a longitudinal axis of the pipeline. One end of the sleeve is fixed on the perimetre of the pipeline, while the second end of the sleeve is connected through hoisting slings with a flexible coupler an end of which is connected with a traction organ. The device is supplied with a pipe stopper represented in the form of a torus mounted on the pipe connected to a hollow cylinder. The device may comprise an additional chamber with a sleeve an end of which is fixed on the perimetre of the pipeline, while the second end of the sleeve is connected through hoisting slings with a flexible coupler connected to the traction body.
EFFECT: extended range of the instruments.
2 cl, 8 dwg
FIELD: machine building.
SUBSTANCE: ballast material for under water mains contains cement, filler, plasticiser and water. As cement there is used sulphate resistant Portland cement; as a plasticiser there is used poly-carbonate PCE, and as filler there is used barite industrial product, barite ore and iron-manganese concentrate. Material has the following ratio of components, wt %: Portland cement - 8.2-10.5, water - 5.2-6.7, plasticiser - 0.1-0.15, barite industrial product - 18-28 with density 3.78-3.82 kg/cm3 and humidity 0.9-2.1 %, barite ore - 18-28 with density 3.9-4.1 kg/cm3 and humidity 2 %, and iron-manganese concentrate - 25-45 with density 4.2-4.5 kg/cm3 and humidity 4 %. Ratio of water to Portland cement is 035-0.5. Components of filler have the following granulo-metric composition: 0-0.16 cm - to 5 %, 0.16-1.0 cm - to 25 %, 1.0-2.5 cm - to 35 % and 2.5-5.0 cm - the rest.
EFFECT: reduced external diametre of pipes with ballast coating.
FIELD: machine building.
SUBSTANCE: procedure for manufacture of sulphate resistant heavy-weight pipe consists in covering central pipe with concrete coating. Concrete mixture with fluidity 4-8 cm by Cone of Abrams, made of sulphate resistant Portland cement m500, water, super-plasticiser, water repellent agent and barite or ore, is applied by spraying. Also, first there is sprayed the first layer of thickness a, further there is wound a reinforcing fibreglass net and the second layer is sprayed consisting of concrete mixture of thickness (0.5-1.5)a with shear between a zone of winding and zone of spraying at 1-3 m. Further, the pipe is left on a rack, till concrete mixture stiffens. A pipe is conditioned in a storage for not less, than three days to facilitate storage strength.
EFFECT: simplified manufacture and increased service life of manufactured pipe.
3 cl, 4 tbl
FIELD: machine building.
SUBSTANCE: procedure for preparing ballast material for underwater pipeline consists in mixing cement, filler, water and plasticiser to make mixture of specified density and flowability. As plasticiser there is used filler of big dimension from the group: barite or iron containing ore or their mixture. Also, mixing is carried out in two stages. At the first stage 10-20 wt % of said big dimension filler of its total amount is supplied into the mixer together with cement, water and plasticiser and mixed for 10-15 sec. At the second stage the rest filler of big dimension is supplied in equal batches with intervals of 10-15 sec, and it is mixed; the components are mixed till there is obtained a homogenous mixture.
EFFECT: raised mechanical strength and density of ballast material.
6 cl, 1 tbl
FIELD: machine building.
SUBSTANCE: ballast material contains cement, filler and water; as ballast it contains barium ore of big fractions with dimension of grains over 5 mm to 25 mm, of small fractions with dimension of grains over 0.16 mm to 5 mm, of super fine fractions with dimension of particles from 0.01 mcm to 160 mcm and additionally plasticiser-poly-carboacetyl at the following ratio of components in wt %: cement 12-17, water -10, poly-carbo-acetyl 0.2-0.3, barium ore - the rest at the following contents of fractions in ore wt %: big fraction over 5 mm to 25 mm 8-16, small fraction over 0.16 mm to 5 mm 70-84, super fine fraction over 0.01 mcm to 160 mcm 8-14.
EFFECT: increased density and strength.
6 cl, 1 ex, 2 tbl
SUBSTANCE: composite material contains cement, filler, water and additionally a filler. At the same time the filler is barite ore with particle size from 0.01 to 160 mcm, filler - wood chips with particle size from 0.5 to 20 mm at the following ratio of components, wt %: cement - 17-25, barite ore - 35-56, wood chips - 6-12, water - 20-30.
EFFECT: increased strength, reduced coefficient of heat conductivity, density.
SUBSTANCE: invention relates to a hydraulically setting mixture containing, wt %: a) 6-25 cement, b) 50-90 of at least one aggregate, wherein the maximum grain size ranges from 8 mm to 63 mm and/or sand with grain size of 5 mm, and c) 0.001-8 of at least one fluoroorganyl-substituted silicon compound, wherein the fluoroorganyl-substituted silicon compound is 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyltrimethoxysilane which is in solid granular form on an inorganic material used as a substrate. The invention also relates to a method of producing the mixture and use of the mixture to produce structural materials.
EFFECT: obtaining structural materials with a surface having dirt-repellent properties and which is easy to clean for a long time.
11 cl, 6 ex, 1 tbl
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
SUBSTANCE: present invention relates to a hydraulic composition which includes: at least one hydraulic binder, at least one first plasticising additive which includes at least one phosphonic-amino-alkylene group, at least one second plasticising additive which includes at least one polymer with a comb-like structure, wherein the weight concentration off the dry residue of the second additive is 25-100% of the weight concentration of the dry residue of the first additive. The invention also relates to concrete which includes said hydraulic composition and the composition of a diluting mixture for said hydraulic composition. The invention is developed in subclaims.
EFFECT: low viscosity of the hydraulic binder-based composition over the processability duration of the composition.
10 cl, 6 tbl, 2 dwg
SUBSTANCE: invention relates to powders for obtaining a self-levelling freshly-prepared concrete mixture. The powder contains, wt %: from 94% to 99% of particles of at least one fire-proof material, whose main component is represented by aluminium oxide and/or zirconium dioxide, and/or silicon dioxide; from 1% to 6% of hydraulic cement; from 0 to 0.03% of organic fibres; optionally from 0.075% to 1%, preferably from 0.1% to 1% of a surface-active substance; and optionally a setting accelerator, with the fraction of particles, possessing the size less than 40 mcm, being distributed relative to the powder mass in the following way, wt %: fraction <0.5 mcm - ≥4%, fraction <2 mcm - ≥5%, fraction <10 mcm - ≥16%, fraction <40 mcm - 29-45%, and a part of zirconium dioxide in the fraction of particles with the size less than 10 mcm, called "fine fractions", is in the range from 35 wt % to 75 wt % relative to the total weight of the said fraction.
EFFECT: improvement of the concrete mixture self-levelling.
24 cl, 6 tbl
SUBSTANCE: invention relates to building equipment and can be applied in the production of concrete products for the improvement of their basic physical-chemical properties. The complex additive for concrete mixtures and mortars contains a superplasticiser C-3, a mixture of Iceland spar, aluminium sulphate and fine-grained pyrite in a ratio, wt %: superplasticiser C3 10-30, Iceland spar 50-80, aluminium sulphate 5-7.5, fine-grained pyrite 5-7.51.
EFFECT: improvement of basic properties of concrete: increase of strength and reduction of moisture permeability.
1 dwg, 1 tbl
SUBSTANCE: raw material mixture for concrete production, which contains cement, a fine filler, a plasticising additive and water, additionally contains milled and sieved through net No. 10 mobile phone waste with preliminarily extracted accumulators with the following component ratio, wt %: cement 24-36; fine filler 12.7-17.9; plasticising additive 0.1-1.5; water 18-36; milled and sieved through net No. 10 mobile phone waste with preliminarily extracted accumulators 10-40.
EFFECT: safe utilisation of mobile phones.
SUBSTANCE: raw material mixture for obtaining artificial stone includes, wt %: Portland cement 28-30, carbon silicides 26-29, iron oxides 1-1.5, water 28-30, cut into 5-15 mm segments asbestos fibre 1-1.5, quartz sand 11-13.
EFFECT: obtaining durable and ecologically safe artificial stone.
SUBSTANCE: invention relates to a powdered composition of a construction material, preferably dry mortar for industrial production, and especially to tile adhesives, joint filler, putty, waterproofing slurry, repair mortar, levelling mortar, reinforcing adhesives, adhesives for heat-insulation composite systems, mineral plaster, fine putty and seamless floor systems, which contains an ester of A) 2-ethylhexanoic acid and B) an alcohol with a boiling point of at least 160°C. Further, the invention discloses the production of said products, as well as use of esters according to the invention in powdered compositions of construction materials for reducing dust formation. The invention is developed in subclaims.
EFFECT: reducing dust formation, reducing the degree of release of organic compounds during storage and use of construction materials.
14 cl, 1 tbl
SUBSTANCE: claimed invention relates to a concrete-expanding additive and to a method of obtaining thereof. Concrete with the said additive possesses higher stability in storage. The concrete-expanding additive is obtained by thermal treatment of a clinker or a powder-like clinker, which contains in wt.p. per 100 parts of the clinker free lime in an amount of 10-70, a hydraulic substance 10-50 and water-free calcium sulphate 1-50, in an atmosphere of gaseous carbon dioxide to form in it calcium carbonate. In the method of obtaining an expanding additive clinker, containing free lime, the hydraulic substance and water-free calcium sulphate are subjected to thermal processing to form in it calcium carbonate. The invention is developed in dependent items of the invention formula.
EFFECT: provision of considerable concrete expansion in the period from 2 to 7 days after laying, which makes it possible to develop high early compression strength.
9 cl, 7 tbl
SUBSTANCE: complex additive for concrete mix, which contains a plasticising agent and carbon nanotubes, differs by the fact that it contains Remicrete SP-60 hyperplasticising agent as the plasticising agent with density of 1.09 g/cm3, Taunit carbon nanotubes as carbon nanotubes, as well as Tiprom-S water-repellent agent at the following component ratio, wt %: Remicrete SP-60 hyperplasticising agent - 93.0-96.0, Taunit carbon nanotubes - 0.4-0.5, Tiprom-S water-repellent agent - 3.5-6.6. In the preparation method of the complex additive for concrete mix, which consists in ultrasonic dispergation of the plasticising agent and carbon nanotubes, Taunit carbon nanotubes are dispergated in Remicrete SP-60 hyperplasticising agent with density of 1.09 g/cm3 during 4-6 minutes at ultrasonic action power of 92 W with further exposure of the obtained mix during 5-10 minutes; after that, Tiprom-S water-repellent agent is added to the obtained dispersion and subject to repeated ultrasonic action with power of 92 W during 1.5-2 minutes.
EFFECT: improving strength of concrete during the first day of hardening; increasing grade strength, freeze resistance and water resistance.
2 cl, 1 tbl