Complex additive for concrete mixtures and mortars

FIELD: chemistry.

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

 

The invention relates to the production of building materials, in particular concrete mixture for the manufacture and production of concrete and concrete products with extended service life by reducing the water resistance of concrete for high-rise construction, to increase the bearing capacity of the facades.

The concrete used in hydraulic engineering and road construction, high demands on durability, which, primarily, is estimated by frost resistance and water resistance of concrete. Modern variety and complexity of technical problems create new tasks for improving the construction materials used in various fields. One solution to such problems is the creation and application of new additive for concrete mixtures and mortars, rationally combining the necessary technological and operational characteristics.

The resistance is a very important characteristic of concrete is not only used in hydraulic structures, such as dams, reservoirs, swimming pools, bridge abutments, but in povsednevnom construction. Repeated penetration of moisture into the pores of the concrete and its freezing leads to the appearance of cracks in concrete stone and reduce the strength of concrete.

Vodophone the awn concrete

Filtration of water in concrete average density may occur mainly in the traversal of cement by micro-cavities at points of contact cement and aggregates resulting from internal water separation by sedimentation cement grout or uneven shrinkage stresses, as well as through the pores and capillaries in the cement stone. The total porosity of the concrete and its permeability concept is ambiguous. Concrete can possess sufficient porosity and at the same time have low permeability. Thus, the capillaries with a diameter of 1 μm is practically impervious to water, as the adsorption layers of water near-wall layer about 0.5 μm narrow living section of the capillaries and sometimes completely overlap, very difficult to filter water through these capillaries. However, the movement of water in the concrete can occur not only in a purely mechanical way, a direct result of the filtering in the presence of pressure, but also because of diffusion processes. Movement of moisture in the finest capillaries, called capillary moisture permeability, can take place in a fairly dense cement stone and concrete, it requires only a small humidity or heat capacity. The intensity of migration or capillary suction depends on the shape and diameter of the capillaries.

Obtaining virtually vodone oncemy concrete provides the required cement content in concrete, dependent on the particle size distribution of aggregates, low water-cement ratio and corresponding to low water content compaction of the concrete mix during the moulding of products in rastvorobetonnyh nodes and optimal moisture conditions of concrete hardening, allowing to extend the hydration process. The permeability can be in some cases drastically reduced with the introduction of concrete additives, surfactants, both hydrophilic and hydrophobic. Thus, with the introduction of the concrete surface-active additives permeability of concrete significantly (10-20 times) decreases. This effect of additives due to the change in the structure of cement paste due to reduced water demand of the concrete mix and reduce water separation cement paste. This in turn leads to a decrease in the number and size of pores in the cement stone and to improve the contact of the latter with a grain filler. Although supplementation involving air, the total number of pores increases slightly, but these micropores being closed, blocking moves messages between the individual capillaries and reduce capillary permeability concrete.

On the modern market of building materials there is a need for rugged and heavy concrete containing aggregates, such as barite, limonite, and with ugashik for the manufacture of various building components and constructions with a volumetric weight of concrete Y o=3000-3300 kg/m3for example, the massive foundations, test stands, various prigozy, balancers, and so on

Famous concrete mix for the production of products and structures made of heavy concrete, including high calcium fly ash, gravel, sand, chloride-containing additive and water (EN 2101251 C1, C04B 28/08, 15.08.1995). This mixture does not allow her to receive designs with volume weight within 3000-3300 kg/m3and chloride-containing additive may cause corrosion of the reinforcement cage concrete products.

Famous concrete mix including hydraulic cement, barite, fly ash, and various chemical additives, including on the basis of carboxylates and sulfonates (GB 1413121, C04B 28/04, 05.11.1975).

This mixture ensures that structures with volume weight 3000-3300 kg/m3, however, does not allow to fully provide other characteristics of concrete: the mobility and persistence for long-distance transport.

The problem is solved in that the concrete mix consists of cement from clinker normalized composition of the HRC D-N, barite concentrate of the various factions, fly ash (powder from waste products), as well as complex chemical additives on the basis of polycarboxylates and lignosulfonates, in the following ratio, wt.%

the Portland cement D-N10,9-11,5
ash0,97-2,4
barite concentrate79,1-80,72
supplements: polycarboxylate0,11-0,16
langoulant0,01-0,02
water6,76-6,88

The essence of this invention lies in the fact that by reducing the cost of cement and water per unit volume (m3), the unused portion of the fill volume of the mixture of barite concentrate, thereby increasing the specific weight of the concrete mix. The composition of the concrete mixture for the manufacture of heavy concrete allows to increase the average density and strength of the material, as well as to expand the resource base by reducing the dosage of the most vital components of a concrete mix, in particular water. The concrete mix for the manufacture of the concrete is intended for building structures with high volume weight, includes Portland cement, made from clinker normalized composition, weighted filler (barium or limonadovy concentrate with a density of not less than 3.8 g/cm3different fractions according to the t purpose concrete mix, conditions of carriage and packing. Also, the concrete mixture includes fly ash dry screening of electrostatic thermal power plants, resulting from the combustion of pulverized coals, i.e., uses waste from the combustion of fuel, thereby improving the environment. In addition, in the concrete mixture used superplasticizers based polycarboxylates.

The ratio of the components of the concrete mixture comprises, by mass %: cement HRC D-N the 10.9-11.5 wt.%, barite concentrate 79,1-80,72 wt.%, ash 0,97-2.4 wt.%, polycarboxylate of 0.11-0.16 wt.%, lignosulfonates 0.01 to 0.02 wt.% and water 6,76-6,88. Water is dosed depending on the conditions of carriage, laying of concrete mix, desired strength, etc. Cement HRC D H must meet the requirements of GOST 10178, barite concentrate - GOST 4682, ash - GOST 25818.

Fly ash have the following chemical composition: SiO246,44%; Al2O310,86%; Fe2O310,00%; CaO 22,15%; MgO 5.98%; the SO32,17%; TiO20,60%; Na2O 0,74%; K2O 0,56%. The specific surface 374 m2/kg. sieve Residue 008-7,0%.

The use of fly ash in the concrete mixture for the manufacture of heavy concrete allows, in addition to recycling waste to produce more dense concrete structure to reduce the consumption of cement or increase its strength characteristics, as well as improving technology is the cue properties of the concrete mixture.

Disadvantages - relatively low strength and high moisture permeability.

Known mineral additive to the concrete by RF patent for the invention №2478589, IPC C04B 7/12, publ. 10.04.2013,

The technical result - the reduction of the content of alkali oxides in the liquid phase of the cement and the quality of cement, mortar and concrete with the specified additive without deterioration of their properties. Mineral additive to cement containing cement kiln dust-fly ash electrostatic rotary kilns, additionally contains a component with a specific surface area of not less than 800 m2/kg, at least one selected from the group: chalk, clay, limestone, when the ratio between the specified component and dust from 1:1 to 1:10, the content of R2O in terms of Na2O in addition of not more than 4%. The additive may contain as specified component dust from the electrostatic precipitators of the joint Assembly for drying and grinding of cement raw materials.

Disadvantages - not improved the basic characteristics of concrete

Known additive for concrete by RF patent for the invention №2478589, IPC C04B 7/12, publ. 10.04.2013,

Technical result: the acquisition of environmentally mixture of substances used as an additive, which helps to enhance the flexibility of concrete and reduce shrinkage. The mixture of substances used as additives for the curing of the material, h is particular to the concrete mix, contains, wt%: xanthan resin 1-8; pseudophakia thickener, water-containing 1-6; thinner 2-10; synthetic resin that is compatible with cement, 20-50; the foaming agent is 0.1 to 3; a curing accelerator 30-70, preservative 0.2 to 4, with the full weight of all the components of the mixture of substances should equal 100 wt.%. The use of this mixture of substances for concrete mixtures containing from 0.01 to 0.5 kg, preferably 0.05 to 0.1 kg per kg of cement mixtures, cement, filler. The above concrete mixture as aggregate all types of sand, all kinds of soils, contaminated or uncontaminated, and/or materials such as bauxite, laterite, volcanic ash, pumice and ash from combustion installations.

Disadvantages - not improved the basic characteristics of concrete: strength and moisture resistance.

Known complex additive for concrete by RF patent for the invention №2457190, IPC C04B 22/08, publ. 27.07.2012,

The technical result is an increase in the growth rate of concrete strength in the early stages of hardening while maintaining its high final strength, ensuring the frost resistance and water resistance. Complex additive for concrete mixture contains, wt%: generatesessionid 2-4, carboxylated polyester 30-35, the hardening accelerator 61-68.

The disadvantages are that despite the acceleration of growth strength level of the concrete strength increased and authorities shall pronitsaemosti has not changed.

Known complex additive to concrete mixture according to the Russian patent for invention №2443648, IPC C04B 24/24, publ. 27.02.2012,

The technical result is the preservation and improvement of technological properties of the concrete mix and the increase of compressive strength of cement stone and concrete for a more rational use of plasticizing agents. Complex additive for concrete mixture contains, wt%: Melflux 265IF - 50-75, polyethylene glycol-PEG 2000 - 25-50.

Disadvantages - the use of expensive imported fill and poor moisture resistance of concrete.

Known complex additive for Portland cement by RF patent for the invention №2431623, IPC C04B 22/00, publ. 20.10.2011,

The complex contains Portland cement, wt.%: gypsum or anhydrite 30-54, superplasticizer C-3 0,5-4,5, flue dust 10-25, ash wastes with alumina content of at least 25 wt.% 16,5-52,5, carbonate rock 12-35. The technical result is an increase in the degree of expansion of Portland cement, which has a higher hydraulic activity, reducing the porosity of Portland cement concrete with a specified additive.

Disadvantages - low strength and high water resistance of concrete.

Known complex additive to concrete mixture according to the Russian patent for invention №2422395, IPC C04B 24/24, publ. 27.06.2011,

The technical result is an increase in strength bet is on in the early stages of hardening while maintaining their high final strength, the increase frost resistance and water resistance. Complex additive for concrete mixture contains, wt%: hyperplasticity "Moby grade 2" - 33-40, the hardening accelerator "Moby 3 brand economy" - 60-67.

The disadvantage is its high vapour permeability of concrete.

Known modifier of concrete and the method of its production by Russian patent for invention №2421424, IPC C04B 22/00, publ. 20.06.2011,

The technical result - the increase of concrete strength on axial tensile and Flexural, strengthening the passivating properties of concrete with respect to the steel reinforcement. In the method of producing modifier concrete, including joint dry grinding bauxite slurry and organic additives, use bauxite sludge from the production of alumina by the alkaline method, as the organic additive is a powder one plasticizer from the group of sulfonated melamine - or naphthaleneformaldehyde modified lignosulfonate, polycarboxylate, this grinding is carried out in the apparatus for impact action when the speed of the particles 100-400 m/s to the dispersion of particles 15-30 microns

Disadvantages - low strength and moisture permeability of concrete.

It is known the use of urea as a modifier, accelerate the setting of concrete mixtures and curing concrete (GOST 2081-75, also Century, Laborers. Modified concretes, M., 998, S. 746).

It is known the use of polyethylene oxide (polyoxyethylene, polyethylene glycol) as a modifier stabilizing, water-retaining action and improves the pumpability of concrete mixtures (GOST 2081-75, also Century, Laborers. Modified concretes, M., 1998, S. 745).

It is known the use of polyethylene oxide in the complex admixtures for concrete (ed.St. The USSR No. 1447779, publ. in 1988; 1143719, publ. 1985)enhancing the plasticity of the concrete solution, its strength and frost resistance. It is known the use of polyethylene oxide with a molecular weight (4,1-6,0)·106as organic additives for heat and sound insulation mortars to improve ukladyvaemost and homogeneity volume.

A common shortcoming of these compounds are low strength properties when they are applied in the composition of the concrete, as well as low frost.

Known additive for concrete mixtures and mortars by RF patent for the invention №2479522, IPC C04B 24/18, publ. 20.04.2013,

Effect: increase frost resistance of concrete in the salt and increase the strength of concrete at age of 28 days. The complex contains (wt.h.): superplasticizer C-3 5-50, isopropyl alcohol 10-55, urea 5-45. In the particular case of the invention, the complex contains (wt.h.): superbly typinator C-3 10-30, isopropyl alcohol 10-55, urea 5-45, salt ballast desulfurization of coke oven gas based thiosulfate and thiocyanate sodium 5-50.

The disadvantage is its high vapour permeability of concrete.

Known complex additive for concrete mixes and mortars containing a mixture of sodium salts of polyethyleneteraftalat manufactured under the trade name superplasticizer C-3, and the mixture ballast salts desulfurization of coke oven gas based thiosulfate and sodium thiocyanate according to the patent of Russian Federation №2228306 (publ. 2004). Significant disadvantages of the specified complex supplements are insufficient strength in the early stages of hardening and low performance hardiness in salts.

Known use as an additive superplasticizer C-3 (patent of Ukraine # 24298, publ. in 1998). Superplasticizer C-3 added to the concrete mix in quantities amounting to 1.35-1,65 by weight of cement. Known additive causes the increase of the plastic properties of the concrete mixture with a reduced water content, which prevents its separation during transportation, and also contributes to obtaining a high-density concrete. Significant disadvantages of the solutions of the prototype are insufficient strength in the early stages of hardening and low performance hardiness in salts.

Known complex Supplement containing with perspectivesfor p-3 and other components for RF patent for the invention №248208, IPC C04B 24/24, publ. 20.05.2013, the Essence of this invention is as follows.

This technical result is achieved due to the use in the composition of complex agent superplasticizer C-3, a mixture of polyethylene glycol and/or polypropyleneglycol with a molecular weight of 250 to 3500 and urea in the following ratio of components (wt.h.):

Superplasticizer C-310-30
The polyethylene glycol and/or propylene glycol5-55
Urea10-60

In the particular case of the invention, the inventive complex additive additionally contains sodium formate in the following ratio of components:

Superplasticizer C-310-30
The polyethylene glycol and/or propylene glycol5-55
Urea10-60
Formate sodium5-35

The achievement of the technical result due to the synergistic effect of the ingredients used.

For the NCD is estline of the invention can be used the following substances:

Superplasticizer C-3 TU 5745-001-97474489-2007;

The polyethylene glycol of low molecular weight THAT 2483-71150986-2006;

Polypropylenglycol THE 6-09-2434-81;

Urea GOST 2081-92 "Urea. Technical conditions";

Sodium formiate THE 2432-011-00203803-98.

The advantages of this invention was evaluated by comparison with the prototype of the following indicators: hardiness in the salts (in the second and third basic methods of determination of frost resistance according to GOST 10060-2-95), precipitation of the cone, the density of the concrete, the concrete strength at 28 days.

To study the properties of the claimed additive was prepared concrete mix containing cement 1 part sand 1.8 parts, gravel fraction 5-20 mm 2.8 parts of water, 0.4 parts.

This additive was introduced into the concrete mixture with mixing water in an amount of 0.7-2% of the liquid product from the cement mass. Tests of the inventive additive in concrete mixtures was carried out according to GOST 10181-200 "concrete Mixtures. Test methods GOST 10180 - GOST 10060.2-95 "Concretes. A rapid method for determination of frost resistance during repeated freezing and thawing".

The disadvantages of the prototype is a relatively low strength concrete and high moisture permeability.

The task of the invention, coinciding with the technical result is to increase the strength of concrete while reducing its vlagopronitsaemostyu.

The solution above is ADAC achieved in the complex additive for concrete mixtures and mortars, containing superplasticizer C-3 because, according to the invention it further comprises a mixture of Icelandic spar, aluminum sulfate and finely dispersed pyrite ratio, % wt.

Superplasticizer C310-30
Icelandic spar50-80
Aluminum sulfate5-7,5
Fine pyrite5-7,5

Additionally, the additive may contain hydrosulphuret calcium 10-15, gidrokarbonat calcium 5-7,5 and hydroalumination calcium 5-7,5%.

The invention is illustrated in the graph (drawing), which shows the change in the strength of the proposed concrete and prototype depending on the percentage content of superplasticizer C-3 Line 1 shows the physical properties of concrete prototype, and line 2 - proposed concrete.

The proof of optimality of the concrete mixture when using domestic additives and supplements-3: in the table.

Preparation of high-strength waterproof concrete superplasticizer C-3 and Iceland spar was made in the following proportions 1 m3:

Cement - 315 kg;

Sand - 80 kg;

Gravel - 1350 kg;

Water - 156 kg

The brand of the test cement M250, M400 and M500.

The complex was added to the cement mixture in an amount of from 1 to 2 wt.%, the weight of the concrete. The introduction of more complex agent any positive results has not given and has increased the cost of concrete work due to the relatively high cost of some components of the additive.

Basic data from the table are shown on the graph: line 1 shows the variation of concrete strength on the prototype, and line 2 - change the strength of the proposed concrete. When this comparison was made for concrete based on cement of grade M-400.

It is obvious that the proposed concrete ceteris paribus has a strength at least 10% higher than the concrete prototype, in addition, the proposed concrete has a much higher permeability.

Conclusions

The strength of the cement M-400 with the use of an additive is higher than with the use of the additive prototype C-3 to 10%.

The optimal range of the additive modifier C-3 coincided with the prototype.

Several times increased the resistance of concrete in comparison with the prototype.

The application of the invention allowed:

- to increase the durability of concrete products by 10%.

to reduce the moisture permeability several times.

- reduce the cost of the additive compared to the DOB is kami, based on imported fillers

.

tr>
The results of tests of concrete with a complex additive
Substance%%%%%%%%
Icelandic spar, %85706 76 461585570
Aluminum sulfate, %555,566,57, 07,510
Fine pyrite, %555,566,57, 07,510
Superplasticiser, p-3 %510202426283010
Physical properties of concrete based on cement M-250 with the application of the proposed integrated supplements
Compressive strength, MPa16,624,926,4628,0229,5831,1432,732,9
Adhesion, kg/cm2to 89.592,592,8br93.1for 93.493,794,098,0
Density, kg/cm32395240024012402240324042405 2407
Waterproof WW4W10W12W12W12W12W12W12
Optimally
Physical properties of concrete based on cement M-400 with the application of the proposed integrated supplements
Strength, MPa48,3a 50.550,6a 50.5to 49.9to 49.349,548,3
Adhesion, kg/cm2to 89.592,592,8br93.1for 93.493,794,098,0
Density, kg/cm323952400 240124022403240424052407
Waterproof WW4W10W12W12W12W12W12W12
Optimally
The placeholderPhysical properties of concrete based on cement M-400 with the use of supplements-3 (prototype)
Compressive strength, MPa44,246,245,945,645,345,044,7-
Waterproof WW4W4W4W4W4W4W4 W4

The complex additive for concrete mixtures and mortars containing superplasticizer C-3, characterized in that it additionally contains a mixture of Icelandic spar, aluminum sulfate and finely dispersed pyrite ratio, % wt.:

Superplasticizer C310-30
Icelandic spar50-80
Aluminium sulfate5-7,5
Fine pyrite5-7,5



 

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9 cl, 4 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to polymer composition used in composition of dispersing substance, its obtaining and application. Claimed is polymer composition for application as dispersing substance, which contains 3-95 wt % of copolymer H and 3-95 wt % of copolymer K, with each of copolymers H and K containing structural units of polyether macromonomer and structural units of acid monomer , which are present in copolymers H and K, in each case, in molar ratio 1:20-1:1, and at least 20 mol. % of all structural units of copolymer H and at least 25 mol% of all structural units of copolymer K, in each case, are present in form of structural unit of acid monomer, with structural units of polyether macromonomer of copolymers H and K containing side chains, in each case, which contain, at least, 5 atoms of ether oxygen, and quantity of atoms of ether oxygen in side chain of structural units of polyether macromonomer of copolymers H and K, in each case, varies in such a way that respective diagrams of density of distribution of probabilities, where quantity of atoms of ether oxygen, in each case, is presented on abscissa axis and respectively corresponding frequencies of occurrence of copolymers H and K, in each case, are presented on ordinate axis, contain, in each case, at least, 2 maximums, whose abscissa values, in each case, differ from each other by more than 7 atoms of ether oxygen, and diagrams of density of distribution of probability of copolymers H and K differ from each other by the fact that abscissa value of, at least, one maximum of copolymer H, in each case, differs by more than 5 atoms of ether oxygen from abscissa values of all maximums of copolymer K, and/or by the fact that mean arithmetic values of atoms of ether oxygen of structural units of macromonomer of polyether of copolymers H and K differ from each other by more than 5 atoms of ether oxygen. Method of obtaining said composition, its application and based on it dispersing preparation are also claimed.

EFFECT: dispersing preparation based on claimed composition is economical, makes it possible to obtain effective hydraulic binding substances, used as superplasticiser for concrete.

23 cl, 2 dwg, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to the field of construction materials, in particular to compositions of additives, used in the production of precast reinforced concrete and commercial concrete. A complex additive for concretes and mortars, includes a plasticiser and an amine organic base, with the following ratio (wt %): plasticiser - 70÷90; amine organic base - 10÷30, as the plasticiser it contains polymethylene-naphthalenesulphonate, and as the amine organic base it contains tetra-aza-adamantane or its mixture with hydroxylamine or alkanolamines. The complex additive for the concretes and construction materials can additionally contain auxiliary components of air-entraining, stabilising, and hydrophobising action, regulators of structure-formation kinetics, foam extinguishers, additives of air-removing action or mixtures of the said compounds.

EFFECT: improvement of deformation characteristics of concretes, ie reduction of creep and shrinkage with unchanged preservability and mobility of concrete mixtures, ensuring the stable strength growth.

2 cl, 2 tbl

Concrete mixture // 2525565

FIELD: chemistry.

SUBSTANCE: concrete mixture includes Portland cement, crushed granite, quartz sand, a microfiller, a superplasticiser based on polycarboxylates and water. Additionally into the mixture introduced is TTP fly ash, as the microfiller used is ground limestone MP-1, and as the superplasticiser, based on polycarboxylates MC-RowerFlow 2695, with the following component ratio, wt %: Portland cement 8-10, ground limestone MP-16-8, TPP fly ash 3-6, quartz sand with the coarseness module Mc 1.9 30-40, crushed granite of fraction 3-10 mm 15-18, crushed granite of fraction 5-20 mm 14-16, the superplasticiser based on polycarboxylates MC-RowerFlow 2695 0.0015-0.003, water - the remaining part.

EFFECT: increase of concrete quality due to increased fluidity of the concrete mixture and its self-compaction.

1 tbl

FIELD: construction.

SUBSTANCE: dry building mixture for monolithic-type building construction, which includes Portland cement, alumina cement, hydrated lime, gypsum, quartz sand, filler, re-dispersed polymer, cellulose ester, antifoaming additive, superplasticising agent, hardening agent, retarding agent, contains bauxite cement as alumina cement, hemihydrate plaster as gypsum, quartz sand with fineness modulus of up to 1.2, filler with specific surface area S sp 2.5-2.8 cm2/g, which contains 5-7 wt % of nanoparticles, polycarboxylate superplasticising agent and in addition high-molecular chitosan at the following component ratio, wt %: Portland cement - 12-33, bauxite cement - 12-19, hydrated lime - 0.3-0.5, hemihydrate plaster - 2.5-6, quartz sand with fineness modulus of not more than 1.2 - 30-50, the above filler - 5-18, re-dispersed polymer - 4-6, cellulose ester - 0.1-0.17, antifoaming additive - 0.1-0.3, polycarboxylate superplasticising agent - 0.2-0.3, hardening agent - 0-0.5, retarding agent - 0-3.5, high-molecular chitosan (200-250 kDa) - 1-2 wt % of Portland cement weight.

EFFECT: increasing sedimentation stability of water-based building mixture; improving impact strength and reducing abrasion of hardened mixture.

4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of preparing a hardening accelerator composition by reacting a water-soluble calcium compound with a water-soluble silicate compound and a method of preparing a hardening accelerator composition by reacting a calcium compound with a silicon dioxide-containing component in an alkaline medium, in both cases the reaction of the water-soluble calcium compound with the water-soluble silicate compound being carried out in the presence of an aqueous solution which contains a water-soluble comb polymer suitable as a plasticiser for hydraulic binders. The invention also relates to a composition of calcium silicate hydrate and comb polymer, use thereof as a hardening accelerator and for reducing permeability of hardened mixtures.

EFFECT: obtaining a hardening accelerator having plasticiser properties, which is capable of increasing strength and wear resistance.

41 cl, 12 tbl, 3 dwg

FIELD: chemistry.

SUBSTANCE: claimed invention relates to application as additive, which improves processability of water formulation with hydraulic binging agent base of: a) at least, one (meth)acryl crest-branched copolymer, which has, at least, one side chain, which carries, at least, one alkoxy- or hydroxypolyalkylenglycol hydrophilic group, b) at least, one ASE (alkaline-soluble emulsion) acryl copolymer. Invention also relates to water formulation with hydraulic binding agent base, which contains as additive, which improving its processability: a) at least, one (meth)acryl crest-branched copolymer, which has, at least, one side chain, carrying, at least, one alkoxy- or hydroxypolyalkylenglycol hydrophilic group, b) at least, one ASE - alkaline-soluble emulsion acryl copolymer. Invention is advanced in dependent i.i. of invention formula.

EFFECT: improvement of processability of claimed formulation without manifestation of segregation effect.

22 cl, 10 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to production of construction materials, particularly a fine-grained concrete mixture and a preparation method thereof, and can be used to make concrete structures, both monolithic and assembled, that used in the industry of construction materials and construction. In the method of preparing a fine-grained concrete mixture, which involves pre-modification of the surface of an aggregate, followed by mixing said aggregate with cement and water, the modifier used is alkyldimethylbenzylammonium chloride in amount of 0.1% of the mass of cement, and the aggregate used in ratio of 1:1 is a mixture of quartz sand with fineness modulus of 1.9 and screenings from grinding rocks from the Argun deposit with grain size of 5-10 mm, with the following ratio of components, wt %: cement - 19-25, aggregate - 68-75, water 6-7. The disclosed fine-grained concrete mixture is prepared using said method.

EFFECT: obtaining a fine-grained concrete mixture with improved physical-mechanical and operational properties based on an aggregate made from local material.

1 tbl, 2 cl

FIELD: chemistry.

SUBSTANCE: mixture for gluing tiles is intended for gluing ceramic tiles and plates from natural stone and contains, wt %: Portland cement - 30-34.5, quartz sand - 55-59.5, limestone - 5-7, cellulose ether - 0.20-0.25, copolymer of vinylacetate and vinylversatate - 1.0-1.5, copolymer of melamine sulphoacid and formaldehyde - 0.3-0.5, calcium formate - 1.0-1.2.

EFFECT: improvement of mixture wetting capacity and increase of strength of its cohesion with glued surface on the first day of solidification.

2 tbl

FIELD: construction.

SUBSTANCE: raw mixture to obtain a granular insulation material contains, by wt %: microsilica 33.5-45, ash and slag mixture 3.0-14.5, apatite-nepheline ore tailings 25-30, sodium hydroxide (in Na2O equivalent) 22-27, ammonium bicarbonate 0.5-1.5. The invention is evolved in dependent claims.

EFFECT: improvement of strength of granular insulation material while reducing its water absorption, utilization of man-made waste.

4 cl, 1 tbl

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