High-strength fine grain concrete

FIELD: construction.

SUBSTANCE: mixture for modified concrete containing portland cement, sand, nanosilica sol, white carbon, superplasticizer and water, characterized in that as a superplasticizer, a Linamix PK additive is used, with the following ratio of components wt %: sand: 66.3-67.8, portland cement 22-22.5, water 5.8-6.1, Linamix PK 3.38-3.45, microsilica 0.225-3, nanosilica sol 0.084-0.351, white carbon 0.045-0.158.

EFFECT: obtaining a mixture for modified concrete of the brand by mobility P2 with a minimum consumption of cement.

4 tbl

 



 

Same patents:
Concrete mix // 2556551

FIELD: construction.

SUBSTANCE: concrete mix contains the following, wt %: Portland cement 23.5-24.0; fine filler 56.5-58.2; polyvinylchloride chips 2.8-4.0; water 15.0-1.0.

EFFECT: improving cold resistance and strength of concrete.

1 tbl

Mastic compound // 2556542

FIELD: construction.

SUBSTANCE: mastic compound contains the following, wt %: Portland cement 40.0-45.0; quartz sand 53.3-58.25; old car tyres that are crushed and sieved through mesh No. 2.5 0.1-0.15; asbestos 0.1-0.15; sodium ethyl siliconate or sodium methyl siliconate 1.5-2.5 at water-to-cement ratio of 0.45-0.55.

EFFECT: improvement of cold resistance of a mastic compound.

1 tbl

FIELD: construction.

SUBSTANCE: high-strength concrete from the mix comprising Portland cement, silicon dioxide containing component, an additive and water contains quartz sand with the fineness modulus, Mc. = 2.6, the crushed stone is the granite crushed stone with the fraction 5-10 mm, the silicon dioxide containing component is the colloidal solution H2SiO3 with the density ρ = 1.014 g/cm3 and pH = 4±0.5 value, and the additive is the water solution with the density ρ = 1.12 g/cm3 and pH = 7.5±0.5 consisting of the mix of polycarboxylated polymers: polycarboxylated polymer on the basis of methacrylic acid with the density ρ = 0.95 g/cm3 and pH = 7±0.5, polycarboxylated polymer on the basis of allyl ether and maleic acid anhydrite with the density ρ = 1.03 g/cm3 and pH = 7±0.5, sodium gluconate C6H11NaO7 and water at the following ratio of components, wt %: polycarboxylated polymer on the basis of methacrylic acid with the density ρ = 0.95 g/cm3 and pH = 7±0.5; - 9.3-10.0; polycarboxylated polymer on the basis of allyl ether and maleic acid anhydrite with the density = 1.03 g/cm3 and pH = 7±0.5 - 10.2-10.4; sodium gluconate C6H11NaO7 - 2.6-2.8; water - 77.2-77.5, at the following ratio of components of high-strength concrete, wt %: Portland cement 21.1-23.2; the named crushed stone 41.94-42.82; the named sand 28.3-29.0; the named silicon dioxide containing component 0.12-0.13; the named additive 0.15-0.2; water 6.24-6.75.

EFFECT: increase of mobility and survivability of concrete mix.

2 tbl

Concrete mixture // 2555966

FIELD: chemistry.

SUBSTANCE: invention relates to industry of construction materials, in particular to production of concrete tiles for floors. Concrete mixture includes, wt.p.: Portland cement 1, marble crumps of fraction 2-8 mm 2-2.2, milled glass of fraction 0.1-0.3 mm 2-2.2, with water-cement ratio 0.45-0.5.

EFFECT: increase of strength.

1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to industry of building materials and deals with compositions of raw material mixtures, which can be used for manufacturing facing tiles. Raw material mixture for manufacturing facing tiles contains, wt %: Portland cement 17.0-20.0; crushed and sieved through net No 5 asbestos cement wastes 41.7-49.5; quartz sand 17.0-20.0, superplasticiser C-3 1.3-1.5; water 15.0-17.0.

EFFECT: increase of tile frost resistance.

1 tbl

FIELD: construction.

SUBSTANCE: concrete mixture for producing heat-resistant fire-retardant coating comprises the components in the following amount (in kg per 1 m3 of concrete mixture): artificial cement - 400; ground shungite - 50; asbestos - 15; granulated blast-furnace slag - 930; water - 295. At that, the granulated blast-furnace slag has fineness modulus Mfn = 2.98 and bulk density of 500 kg/m3, and shungite has optimum dispersion: fineness modulus Mfn = 1.43, specific surface Ssp = 320 m2/kg.

EFFECT: development of composition of concrete mixture for producing the fire-retardant coating of high thermal stability, having the improved physical and mechanical properties and allowing to improve the degree of fire resistance of reinforced concrete structures.

3 tbl

FIELD: construction.

SUBSTANCE: peat and polymer mix, comprising a base in the form of peat and and a binding element, comprises five components, wt %: nanomodified peat of suspensions of polyvinyl acetate and cyclone dust of gas treatment of air of industrial enterprises (in terms of dry polyvinyl acetate in amount of 5% from mass of peat and dust - 3%) - 25, portland cement CEM-II-42.5 - 35, sodium bicarbonate - 15, ammophos - 5 and water - 20.

EFFECT: increased strength at invariable density, increased fire resistance, reduced heat conductivity.

1 tbl

FIELD: construction.

SUBSTANCE: peat and polymer mix for manufacturing of construction products, including a base in the form of peat and a binding element, differing by the fact that it comprises the following components, wt %: nanomodified peat of suspensions of polyvinyl acetate and cyclone dust of gas treatment of air of industrial enterprises (in terms of dry polyvinyl acetate in amount of 4-6% from mass of peat, dust - 2-3%) - 25%, portland cement CEM-II-32.5 - 35, calcium chloride - 10, ammophos - 5 and water - 25.

EFFECT: increased fire resistance and strength characteristics at invariable density, reduced heat conductivity, increased homogeneity of structure and durability of heat insulation material.

1 tbl

FIELD: construction.

SUBSTANCE: peat and polymer mix for manufacturing of heat insulation products, including a base in the form of peat and a binding element, comprises four components, wt %: nanomodified peat of suspensions of polyvinyl acetate and cyclone dust of gas treatment of air of industrial enterprises (in terms of dry polyvinyl acetate in amount of 4-6% from mass of peat, dust - 2-3%) - 25%, portland cement CEM-II-32.5 - 40%, sodium carbonate - 10% and water - 25%.

EFFECT: increased fire resistance and strength characteristics at invariable density, reduced heat conductivity, increased homogeneity of structure and durability of heat insulation material.

1 tbl

FIELD: oil and gas industry.

SUBSTANCE: lightweight plugging material contains cement PTsT-I-100, lightweight - expanded vermiculite, technical salt, chemical agent Crep, at the following ratio in wt %: cement PTsT-I-100 - 84.75; vermiculite - 9.42; Crep - 1.13; NaCl - 4.7. During the cement slurry preparation - expanded vermiculite, technical salt.

EFFECT: exclusion of the hydraulic fracture during wells cementation due to improved parameters of the packing cement, increased strength of cement stone at low and moderate temperatures at early stage of solidification upon simultaneous density reduction of the cement slurry.

1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to obtaining gypsum construction boards. The method of obtaining a gypsum construction board consists in the following: a crest-like copolymer fluidising substance and a water-soluble basic polymer, possessing the preferential affinity for clay, are added to an aqueous gypsum suspension, containing clay swelling in water, the suspension is allowed to harden in such a way that a board is formed, and the water-soluble basic polymer consists mainly of carbon, nitrogen and hydrogen and a halogenide ion and has amino groups (which can be primary, secondary, tertiary or quaternary) in the polymer skeleton and/or on its side chains.

EFFECT: production of gypsum construction boards.

7 cl, 3 dwg, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to versions of a nonionic copolymer of a polyether and a polyester used in a cement composition for prolonging workability and to versions of a cement composition. The nonionic copolymer contains residues of monomers A, B and/or C. Monomer A is at least one ethylenically unsaturated monomer of a carboxylic ester containing a moiety which hydrolyses in a cement mixture, where the hydrolysed monomer residue contains an active binding portion for a component of the cement mixture. Component A is a hydroxyalkyl monoester, a hydroxylalkyl diester or mixtures thereof. Monomer B is at least one ethylenically unsaturated alkylene ether monomer containing at least one C2-4 oxyalkylene side group consisting of 1-30 links. Monomer C is at least one ethylenically unsaturated alkylene ether monomer containing at least one C2-4 oxyalkylene side group consisting of 31-350 links. Molar ratio of monomer A to the sum of molar ratios of monomers B and C is equal to 1:1-10:1. The cement composition contains water cement, water and an additive which contains said copolymer.

EFFECT: invention enables to preserve workability of the cement mixture, provides high fluidity, high stability and wear resistance thereof.

39 cl, 10 dwg, 9 tbl, 36 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a polymer composition and a method for preparation thereof, a dispersant and a method for preparation thereof, as well as to use of the polymer composition. The polymer composition contains 3-90 wt % copolymer H and 3-90 wt % copolymer K. Each of the copolymers H and K contains structural links of a polyether macromonomer and structural links of an acid monomer in molar ratio of 1:20-1:1. At least 20 mol % of all structural links of copolymer H and at least 25 mol % of all structural links of copolymer K, in each case, are present in form of structural links of the acid monomer. At least 60 mol % structural links of the polyether macromonomer of copolymer H are represented by a structural link of an α derivative of isoprenol polyether of general formula (Ia) , where A are identical or different and denote an alkylene group in accordance with CxH2x, where x=2, 3, 4 or 5, and a are identical or different and denote an integer from 4 to 300. At least 60 mol % of structural links of the polyether macromonomer of copolymer K are represented by a structural link of a β derivative of a vinyloxy polyether of general formula (Ib) , where RA are identical or different and denote a hydrogen atom, a linear or branched C1-C12alkyl group, C5-C8cycloalkyl group, phenyl group or C7-C12arylalkyl group, A are identical or different and denote an alkylene group in accordance with CxH2x, where x=2, 3, 4 or 5, b are identical or different and denote an integer from 6 to 450. The arithmetic average of alkylene groups A of structural links belonging to the structural link of the β derivative of vinyloxy polyether is at least 1.5 times greater than the arithmetic average of alkylene groups A of structural links belonging to the structural link of the α derivative of isoprenol polyether. The dispersant contains at least 30 wt % water and at least 10 wt % said polymer composition. The method of preparing the polymer composition and the dispersant involves preparing each of the copolymers H and K separately from each other in an aqueous solution and then mixing the separately prepared copolymers or separately prepared aqueous solutions. The polymer composition is used as a dispersant for hydraulic binding agents and/or for binding agents with latent hydraulic properties.

EFFECT: invention enables to produce a highly effective super-plasticising additive.

54 cl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a copolymer and a method of its obtaining, to a dispersing means and a method of its obtaining, as well as to the copolymer application. The copolymer contains: i) 3-40 mol% of an isoprenol polyether derivative structural element α; ii) 3-40 mol% of a vinyloxypolyether derivative structural element β; and iii) 35-93 mol% of an acid structural element γ. The isoprenol polyether derivative structural element α is represented by the following general formula

,

where A are similar or different and are represented by alkylene groups in accordance with CxH2x, where x=2, 3, 4 or 5, a are similar or different and are represented by an integer number between 4 and 300. The vnyloxypolyether derivative structural element β is represented by the following general formula:

,

where RA are similar or different and are represented by a hydrogen atom, a linear or branched C1-C12alkyl group, a C5-C8cycloalkyl group, a phenyl group or C7-C12arylalkyl group, A are similar or different and are represented by alkelene groups in accordance with CxH2x, where x=2, 3, 4 or 5, b are similar or different and are represented by an integer number from 6 to 450. The mean arithmetic of alkylene groups of A structural elements, which relate to the vinyloxypolyether derivative structural element β, is at least 1.5 times higher than the mean arithmetic of alkylene groups of A structural elements, which relate to the isoprenol polyether derivative structural element α. The dispersing means contains, at least, 30 wt % of water and, at least 10 wt % of the copolymer. The method of obtaining the copolymer or the dispersing means consists in the following: an isoprenol polyether derivative monomer, a vinyloxypolyether derivative monomer and an acid monomer react by free-radical polymerisation with application of a peroxide-containing redox initiator system in a water solution. A temperature of the water solution during polymerisation constitutes 10-45°C and pH is 3.5-6.5. The copolymer is applied as the dispersing means for hydraulic binding substances and/or latent hydraulic binding substances.

EFFECT: invention makes it possible to elaborate a highly efficient superplasticiser.

28 cl, 1 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to method of obtaining cement compositions, holding sagging or holding sagging with high early strength. Method includes mixing hydraulic cement, filling agent, water and sagging-holding additive, which represent dynamic polycarboxilate copolymer. Copolymer contains residues of, at least, the following monomers: A) unsaturated dicarboxylic acid, B) at least, one ethylene-unsaturated alkenyl ether, which has C2-4 oxyalkylene chain with from 1 to 25 links, C) at least, one ethylene-unsaturated alkenyl ether, which has C2-4 oxyalkylene chain with from 26 to 300 links, D) ethylene-unsaturated monomer, which contains part, hydrolysed in cement composition, in which residue of ethylene-unsaturated monomer, when hydrolysed, contains active binding site. Ratio of component A acid monomer to alkenyl ethers of component B and component C(A):(B+C) constitutes from1:2 to 2:1. Ratio of acid monomer of component A to ethylene-unsaturated monomer of component D, which contains hydrolysed part, constitutes from 16:1 to 1:16.

EFFECT: invention makes it possible to preserve placeability of composition for a long period of time and increase compression strength.

30 cl, 5 dwg, 8 tbl, 29 ex

FIELD: construction.

SUBSTANCE: composition for preparation of a complex additive for concretes, including technical lignosulfonates and clay, containing montmorillonite, additionally comprises calcium chloride, alkaline drain of production of ε-caprolactam, oligomers of ε-caprolactam, alcohol fraction of wastes of production of ε-caprolactam, phospholipdes of vegetable oils, unrefined rape oil at the following ratio of components, wt %: technical lignosulfonates 30-60, clay containing montmorillonite, 14-26, calcium chloride 1-5, alkaline drain of production of ε-caprolactam 2-4, oligomers of ε-caprolactam 2-4, alcohol fraction of wastes of production of ε-caprolactam 10-20, phospholipides of vegetable oils 4-7, unrefined rape oil 3-8. The method for production of a complex additive for concretes - introduction of the following components into the mixer of rotary-pulsation type and their joint dispersion: alkaline drain of production of ε-caprolactam, oligomers of ε-caprolactam, alcohol fraction of wastes of production of ε-caprolactam, phospholipides of vegetable oils and unrefined rape oil, then ground clay is added to the mixer, and the clay contains montmorillonite, and the process is carried out until its grinding to the size of particles of montmorillonite of less than 10-2 mcm, afterwards technical lignosulfonates and calcium chloride are added to the mixture.

EFFECT: reduced water absorption and higher strength of concrete including a complex additive according to the invention.

2 cl, 5 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: present invention relates to use, when preparing an aqueous composition based on hydraulic binder combinations, of at least one comb-like copolymer containing a (meth)acrylic backbone on which are grafted side chains containing a hydrophilic group and at least one comb-like copolymer containing a (meth)acrylic backbone on which side chains ending with a hydrophobic group are grafted. The invention also relates to a hydraulic binder-based aqueous composition containing: a) at least one comb-like (meth)acrylic copolymer containing at least one side chain bearing at least one hydrophilic alkoxy group or a hydroxyl group of polyalkylene glycol, b) at least one comb-like (meth)acrylic copolymer containing at least one side chain bearing at least one hydrophobic group. The invention is developed in subclaims.

EFFECT: ensuring processability of said composition without triggering off segregation.

14 cl, 10 ex, 1 tbl, 2 dwg

FIELD: chemistry.

SUBSTANCE: present invention relates to a composition of a water-redispersible polymer powder based on at least one synthetic polymer and at least one natural latex and which is used in compositions of construction materials. The composition of said polymer powder contains at least one water-insoluble synthetic polymer, preferably about up to 90 wt %, at least one modified natural latex, preferably about up to 90 wt %. The natural latex is obtained by mixing and reacting it, in aqueous phase, with at least one radical initiator and/or oxidising agent. The water-insoluble synthetic polymer is obtained using emulsion, suspension, microemulsion and/or inverted emulsion polymerisation. The composition also contains preferably about 0-50 wt % of at least one protective colloid, about 2-50 wt % of at least one filler and/or anti-caking agent. The composition also optionally contains additives. Modified latex, which is subsequently dried, is mixed with the synthetic polymer. The synthetic polymer is added before, during and/or after adding at least one radical initiator and/or oxidising agent. The synthetic polymer is added and/or in form of water-redispersible polymer powder.

EFFECT: invention enables to obtain redispersible polymer powder with improved water repellence and reduced water absorption.

15 cl, 4 tbl, 15 ex

FIELD: chemistry.

SUBSTANCE: process is carried out in continuous mode in a polymerisation apparatus, having a polymerisation reactor which is integrated with a measuring device. The method involves feeding a low-reactivity polyester macromonomer and water into the polymerisation reactor. A portion of a highly reactive, hydrolysable monomer is then added and an aqueous polymerisation medium is formed. At least a portion of the hydrolysable monomer is initially fed into the measuring device and then into the polymerisation reactor. Free-radical polymerisation is then carried out in an aqueous medium. Before and/or while adding the hydrolysable monomer, a free-radical polymerisation initiator is fed into the polymerisation reactor. During polymerisation, the rate of adding the hydrolysable monomer and/or initiator is varied in steps or continuously. No monomer for including ionic cement binding sites into a nonionic copolymer is fed into the polymerisation reactor. The hydrolysable monomer used is at least one ethylenically unsaturated hydrolysable monomer A. The polyester macromonomer used is at least one ethylenically unsaturated monomer of polyoxyalkylene ester B and/or C. Component B and/or C can be fed into the reactor in advance and component A is then added thereto at a rate which varies at least once.

EFFECT: invention enables to obtain a nonionic copolymer which is capable of prolonging placeability of the cementing mixture over s long period of time, which enables to minimise the need to adjust deposits during preparation and at the construction site, reduce repeated dosing of plasticising additives into the cement mixture.

26 cl, 10 dwg, 9 tbl, 36 ex

FIELD: chemistry.

SUBSTANCE: copolymer contains as monomer components, a) at least one compound which contains a sulphonic acid group, b) at least one compound selected from a group comprising N-vinyl-caprolactam, N,N-dimethylacrylamide, N,N-diethylacrylamide, isopropylacrylamide, N-vinylpyrrolidone, N-vinylacetamide, N-vinylformamide, N-methyl-N-vinylacetamide, N-alkylacrylate and N-alkylmethacrylate, and c) at least one bifunctional vinyl ester selected from: divinyl ester of triethylene glycol, divinyl ester of diethylene glycol or divinyl ester of butanediol. Also disclosed is use of the copolymer as an additive to hydraulic binders and/or compositions containing components that swell in water.

EFFECT: copolymer is sued as water-retaining or anti-segregation agent.

10 cl, 12 tbl, 20 ex

FIELD: construction.

SUBSTANCE: structure for preparation of a building mortar and fine-grained concrete mix comprises by wt %: basalt with the average size 360±98 - 30-40%; silicon dioxide containing rock with the average size 266±69 - the rest.

EFFECT: increase of strength of building mortars and fine-grained concrete mixes.

2 dwg, 2 tbl

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