Dry composition for creation of self-levelling rapidly hardening liquid floors

FIELD: chemistry.

SUBSTANCE: invention relates to industry of building materials and can be used for manufacturing self-levelling rapidly hardening cast products and constructions of self-levelling floor type in industrial and civil buildings, trade halls and gyms, car parkings and garages. Dry composition for creation of self-levelling rapidly hardening liquid floors, including gypsum binding agent, superplasticiser and activator of hardening, contains mixture of Portland cement, aluminate cement and gypsum binding agent - calcium α-semi-hydrate - as binding base, polyethyleneglycol and copolymer vinylacetate-ethylene as superplasticiser, and highly disperse silicon dioxide with specific surface 6000-9000 cm2/g as hardening activator with the following ratio of components, wt %: Portland cement - 8.4-15.6; aluminate cement - 12.8-23.4; calcium sulphate α-semi-hydrate - 4.5-10.2; polyethylene glycol - 0.8-3.9; vinylacetate-ethylene - 3.0-4.6; highly disperse silicon dioxide with specific surface 6000-9000 cm2/g - 20.4-27.0; filler the remaining part.

EFFECT: increased rate of gaining strength by solidified composition at early stages (1-7 days) and increased strength in 28-day with simultaneous preservation of exploitation and aesthetic properties of obtained composite material.

5 cl 6 ex 1 tbl

 

The invention relates to the construction materials industry and can be used for making quick self-leveling compositions, molded products and structures type, self-leveling floors in industrial and civil buildings, sports halls, Parking lots, garages.

Known self-leveling composition for flooring containing α-hemihydrate calcium sulphate and Portland cement as a binder, stabilizing and modifying additive (lignosulfonates) and water [1].

This invention has significant drawbacks: there are no data on the curing composition and its normalized maximum strength (after 28 days).

Known construction composition, comprising, by weight.h.: gypsum-based mineral binder - 100; neutralized copolymer of methacrylic acid and Acrylonitrile - 0,4-4,0; water-soluble salt of a two - or trivalent metal or a mixture of these salts - 0,5-6,0; water - 50-77 [2].

The composition has high mobility and has the property of self levelling and curing in air for 28 days compressive strength is a 14.1 MPa.

Disadvantages songs are: short time viability in high-mobility state, the low mechanical strength of both early and final stages of curing.

The known is the method of preparation of a composition for the device self-leveling subfloor [3]. The composition consists of anhydrite binder (CaSO4), activator curing, as a product of the desulfurization of flue gases containing sulfate and calcium sulfite, superplasticizer C-3 in the following ratio, wt.%:

anhydrite binder79,0-89,2
the specified activator9,2-19,0
superplasticizer C-31,6-2,0

This composition is a homogeneous, self-leveling, high plasticizing properties and is rapidly gaining strength in the early stages of hardening (1-7 days).

This invention is the closest to the technical essence and chosen as a prototype.

Proposed prototype, the composition has the following disadvantages.

Products flue gas desulfurization mining production, used as activator curing, unstable in its composition, which affects their activating properties and the speed of curing of the composition. In the invention, there is no data about the viability of composition in high-mobility state, its maximum strength during curing and water resistance.

This is achieved by the fact that the dry composition to create a quick self-leveling screed, including gypsum binder, superplasticizer and activator curing, characterized in that as a knitting basics taken a mixture of Portland cement, α-hemihydrate calcium sulphate (gypsum) and aluminate cement, in the role of superplasticizer is a polyethylene glycol and a copolymer of vinyl acetate-ethylene, and as an activator of hardening is highly dispersed silicon dioxide with a specific surface area 6000-10000 cm2/g in the following ratio, wt.%:

Portlandof 8.4 to 15.6
aluminate cement12,8-23,4
calcium sulfate α-hemihydrate)4,5-10,2
superplasticizer:
the polyethylene glycol from 0.8 to 3.9
the vinyl acetate-ethylenea 3.0 to 4.6
activator curing:
highly dispersed silicon dioxide20,4-27,0
fillerrest

To obtain a dry composition as a binding framework used a mixture powder (specific surface 4000-4500 cm2/g) of Portland cement, aluminate cement and gypsum in the form of a hemihydrate of calcium sulfate CaSO4*0,5 H2O.

As activator curing took a powder of highly dispersed silicon dioxide with a specific surface area 6000-9000 cm2/, the Dispersion of the powder is controlled using a laser analyzer particle size Fritsch Analysette 22 NanoTech.

As the dosage of the additive used a mixture of powders of polyethylene glycol and a copolymer of a vinyl acetate-ethylene.

The proposed composition of the dry composition with it set by the ratio of ingredients allows you to implement the necessary mobility been closed mass, its ability to self-levelling and optimal time of the vitality, but also to provide a sufficiently rapid curing at an early stage of curing and high ultimate strength obtained is on the material while maintaining its high performance and aesthetic properties.

High mobility and self been closed composition is achieved at a low value bootverbose relationship a/T=0,20-0,27, and during curing on the air, it is rapidly gaining strength at an early stage (1-7 days) curing. This is caused by the use in the composition of active highly dispersed silicon dioxide and dosage of the additive. When fine dispersion of silicon dioxide is a mechanical destruction of its structure with a gap ≡Si-O-Si≡ relations and the formation of active particles of the free radical type.

The formation of such particles were detected by electron paramagnetic resonance (E. p. R.).

The polyethylene glycol and a copolymer of vinyl acetate-ethylene have not only an effective plasticizing effect on zatvorenog mass, but also chemically interact with the active particles highly dispersed silicon dioxide and binder particles, causing the organic tumors and reducing the surface tension at the phase boundary solid - liquid. The result is the intensification of the processes of gelation and subsequent to it, crystallization, causing acceleration of the curing of the composition. In addition, the formation of organic-mineral tumors leads to the binding of free cations CA2+ not included is crystalline. This dramatically lowers the concentration of CA2+ on the surface been closed mass, and when it is cured on the surface of the composition is practically no "vysokoobrazovannye"; formed surface aesthetic appearance.

To obtain a dry composition as a binding framework used a mixture of high quality powder (specific surface 4000-4500 cm2/g): Portland cement M-500, aluminate high-alumina VHC I (M-400) and gypsum brand G-16 in the form of a hemihydrate of calcium sulfate CaSO4*0,5 H2O.

As activator curing took a powder of highly dispersed silicon dioxide with a specific surface 6000-9000 cm2/, the Dispersion of the powder is controlled using a laser analyzer particle size Fritsch Analysette 22 NanoTech.

As superplasticity additives used a mixture of powders of polyethylene glycol and a copolymer of a vinyl acetate-ethylene.

As the filler used dispersed (0.1-1.0 mm) inert rock high strength and high hardness: granite, granitogres, diorite, quartz, grossular.

The proposed composition of the dry composition with it set by the ratio of ingredients allows you to implement the necessary mobility been closed mass, its ability to self-levelling and optimal time of the vitality, but also to ensure rises is fast curing at an early stage of curing and high ultimate strength of the material while maintaining its high performance and aesthetic properties.

From the dry composition can be produced rapid hardening self-levelling materials, solid construction products and designs in different colors, if the base composition of the dry mixture to introduce additives mineral pigments: oxides of chromium, titanium, iron, manganese, or ultramarine, umber, carbon black or chalk, ocher, ochre in the amount of 0.3 to 4.0 wt.% in excess of 100%.

Examples of preparation of dry compositions, receiving from her mobile self levelling mass and hardening.

Example 1.

For making the party a dry composition charge, wt.%: Portland - 15,6, aluminate cement - 23,4, alpha hemihydrate calcium sulphate (gypsum) - 4,5, polyethylene glycol - 3,9, vinyl acetate-ethylene - 4,6, highly dispersed silicon dioxide - 24 and granite sand particle size of 0.1-1.0 mm - 24.

These measured quantities of ingredients mix dry within 5 minutes.

Next, the resulting dry composition is shut in pure water at 20°C and stirred until the formation of highly mobile self-leveling mass without lumps (the mixer rotation speed of 400-600 rpm./min). The mobility of the mass determined by the viscometer Suttora.

This dry composition is formed samovyravnivayuschihsya mass when the value bootverbose relationship a/T=0,27. Spot RASPLAV was 24 cm, while the viability of the mass in Vysokomol ignom 40 minutes.

The movable mass is poured into special molds for prototype and utverjdayut in air at room temperature. Make samples of two types: a) plate size 40×30×10 mm for the study of trainerstation, homogeneity and uniform distribution of color (pigmented compositions) in the material; b) balocchi size 160×40×40 mm for determination of strength properties and water resistance.

The measurement of the strength of the obtained materials is carried out after curing in air at 20°C for 1, 3, 7 and 28 days. Measurement data is given in the table.

Example 2.

For making the party a dry composition charge, wt.%: Portland - 8,4, aluminate cement - 12,8, alpha hemihydrate calcium sulphate (gypsum) - 10,2, polyethylene glycol - 0.8, vinyl acetate-ethylene 3,0, highly dispersed silicon dioxide - 20.4 and sand granitogres particle size of 0.1 to 1.0 mm 44,4.

These measured quantities of ingredients were mixed dry for 5 minutes.

The zatvoreniem dry composition with water, obtaining mobile self levelling mass, curing and subsequent measurement of the properties was carried out analogously to example 1.

This dry composition was formed into a mobile self-leveling mass mixing 24 wt.% water. Time viability was 45 min, a/T=0,24. Strength and the other with the STS utverzhdenii compositions presented in the table.

Example 3.

For making the party a dry composition charge, wt.%: Portland cement is 11.0 aluminate cement - 16,5, alpha hemihydrate calcium sulphate (gypsum) - 7,0, polyethylene glycol - 2,1, vinyl acetate-ethylene - 3,8, highly dispersed silicon dioxide - 27.0 and quartz sand particle size of 0.1-1.0 mm - 32,6.

The composition was mixed dry for 5 min, then kneaded with water before the formation of highly mobile, self levelling mass. This condition was achieved when the value bootverbose relationship a/T=0,22 (RASPLAV spots 25 cm). Time viability 53 minutes. Strength and other properties of the composition when it is curing in the table.

Example 4.

For making the party a dry composition charge, wt.%: Portland - 13,2, aluminate cement - 19,0, alpha hemihydrate calcium sulphate (gypsum) - 5,9, polyethylene glycol - 2,8, vinyl acetate-ethylene - 3,4, highly dispersed silicon dioxide - 22,0 and diorite particle size of 0.1 to 1.0 mm 33,7.

These measured quantities of ingredients were mixed dry for 5 minutes.

The zatvoreniem dry composition with water, obtaining mobile self levelling mass, curing and subsequent measurement of the properties carried out analogously to example 1.

The properties of the composition in zatvorenom mobile and dry conditions is given in the table.

Example 5.

For preparation, the of party dry compositions take, wt.%: Portland - 9,0, aluminate cement - 14,0, alpha hemihydrate calcium sulphate (gypsum) to 8.0, polyethylene glycol and 2.5, vinyl acetate-ethylene - 3,5, highly dispersed silicon dioxide - 21,0, granite particle size of 0.1 to 1.0 mm 21,0 and diorite particle size of 0.1 to 1.0 mm 21,0.

These measured quantities of ingredients were mixed dry for 5 minutes.

The zatvoreniem dry composition with water, obtaining mobile self levelling mass, curing and subsequent measurement of the properties carried out analogously to example 1.

Example 6.

For making the party a dry composition charge, wt.%: Portland - 13,2, aluminate cement - 19,0, alpha hemihydrate calcium sulphate (gypsum) - 5,9, polyethylene glycol - 2,8, vinyl acetate-ethylene - 3,4, highly dispersed silicon dioxide - 22,0, granite particle size of 0.1 to 1.0 mm 16,8 and grossular particle size of 0.1 to 1.0 mm 16,9.

These measured quantities of ingredients were mixed dry for 5 minutes. Further, all operations carried out analogously to example 1.

The properties of the composition given in the table.

The analysis of the results shows (table) that created the dry composition, when performing simultaneously the totality of conditions related to the features of the invention, provides at its zatvorenii high mobility and self weight over time, the need for the CSO to distribute it over a large surface and when cured in air composition is rapidly gaining strength at an early stage and has a high end (28 days) strength.

The mapping properties of the obtained compositions with properties of the compositions of the prototype and its analogues have shown the following benefits of the proposed technical solutions:

- created compositions have a higher curing rate in the early stages and trying to enter in 1-7 days strength ~ 1.5 times higher;

the normalized strength (28 day) at pressures higher than ~ 2 times;

- during curing compositions have formed a smooth, uniform surface aesthetic appearance.

The obtained dry composition was tested in the experimental production and can be recommended for the production of a wide self-leveling rapid hardening materials, cast building products and structures such as seamless epoxy floors, including color.

When the device of the filling or applying a color coating to any building design self-levelling mass is poured on pre-properly prepared surface. The surface should be level, dry, free from dust, grease, oils and other contaminants. Cracks, chips, holes and other defects must be repaired, deepening to 10 mm and more filled repair the cement "mortar" for 24 hours before applying the composite mixture. For better adhesion of the composition to the concrete sub floor it is advisable to process the primer, and applying it to the surface with a roller, brush or spray. In addition, prior to coating on the base along the perimeter of the room (along walls, columns) to lay the enclosing strips (e.g., polystyrene), employees damper gasket between the applied composition and structures of the building.

Prepared self-levelling composition is poured directly onto the surface and spreads over it, forming an even layer of the desired thickness. Depending on the composition and mobility of the mass, the layer thickness can be varied from 2 to 10 mm Spread the weight recommended rolled spiked roller to its more uniform distribution and to remove trapped air bubbles.

If necessary, applying several layers of self-leveling compositions, each subsequent layer is applied to completely dry previous primed.

Fill areas of small size should be carried out at one time, and a large area divided into sectors and pour sequence.

SOURCES of INFORMATION

1. SU # 1470713,1989. The way to the floor.

2. RU # 2107671, 1998. Building composition.

3. RU # 2045494, 1995. The method of preparation of a composition for ostwest the self-leveling of the subfloor (prototype).

Table
Properties of the compositions, the compositions of the prototype and its analogues.
Example No.Vysokomol. stateThe cured composition
A/TTime isnsp., minutesMechanical strength, kg/cm2Coefficient of resistance KV*
1 day3 days7 days28 days
RcompressionRthe stretching.RcompressionRthe stretching.RcompressionRthe stretching.RcompressionRthe stretching.
10,274098,414, 131,0the 17.3270,320,5360,224,40,85
20,2445101,115,0128,116,6249,219,3310,123,00,87
30,2253104,315,8to 132.617,8276,0of 21.2345,423,90,90
40,2442to 102.314.4V129,016,5256,119,7323,124,00,84
50,2545100,215,1127,016,1249,219,0311,322,90,81
60,2445102,513,9to 130.115,8261,118,8317,423,40,85
RU # 2045494 prototypefor 0,19 0,40-26,0 is 67.5---82,0-187,0----
RU # 2107671 similar93-150----- -141,5of 87.30,24-0,80
SU # 1470713 similar033-0,5015-30-------of 7.8 to 15.6-
*KV. - the ratio of the strength of water-saturated sample to the strength of the sample cured in air (28 days)

1. The dry composition to create a fast-curing self-compacting screed, including gypsum binder, superplasticizer and activator of hardening, characterized in that as a knitting basics taken a mixture of Portland cement, aluminate cement and gypsum binder - α-hemihydrate calcium sulphate , in the role of superplasticizer is a polyethylene glycol and a copolymer of vinyl acetate-ethylene, and as an activator of hardening is highly dispersed silicon dioxide with a specific surface area 6000-9000 cm2/g in the following ratio, wt.%:

Portlandof 8.4 to 15.6
aluminate cement12,8-23,4
α-hemihydrate calcium sulfate4,5-10,2
superplasticizer:
the polyethylene glycolfrom 0.8 to 3.9
the vinyl acetate-ethylenea 3.0 to 4.6
activator curing:
fine dioxide
silicon20,4-27,0
fillerrest

2. The dry composition under item 1, characterized in that it contains mineral filler, which is taken inert solid rocks: granite or granitogres, or diorite or quartz, or grossular.

3. The dry composition under item 2, characterized in that the mineral filler dispersed to a particle size of 0.1 to 1.0 mm

4. The dry composition in p. 1-3, characterized in that it further comprises a pigmenting additive in the amount of 0.3 to 4.0 wt.% by weight of the composition, in excess of 100%.

5. Dry the composition according to p. 4, characterized in that as a pigmenting additives it contains powders is of xadow chromium, titanium, iron, manganese, or ultramarine, umber, carbon black or chalk, ocher, ochre.



 

Same patents:
Dry building mix // 2540176

FIELD: construction.

SUBSTANCE: dry building mix including sand, lime, Portland cement, fillers based on silicic rocks includes binding gaize being overburden rock of Pershinskoye minefield of quartz porphyry of Dalmatovsky District of Kurgan Region, or similar gaize with content of hydrated silicone dioxide of at least 70% and has the following component ratio (parts by weight): sand - 240±5, gaize - 35±5, lime - 25±5, Portland cement of M400 grade - 30±5 - for masonry mortars with compressive strength of up to 250 kg/cm2; component ratio (parts by weight) is as follows: sand - 195±5, gaize - 30±5, lime - 15±5, Portland cement of M400 grade - 20±5 - for masonry and finishing mortars with compressive strength of up to 161 kg/cm2; component ratio of finishing mortars is as follows: sand - 40%, lime - 30%, gaize - 30% (Portland cement is not included) with compressive strength of up to 77 kgf/cm2; it can also contain lime-containing wastes of different productions and plasticizing agents or other functional additives.

EFFECT: enlarging the scope of application of a mix and improving its qualitative characteristics.

3 cl

FIELD: chemistry.

SUBSTANCE: invention relates to raw material mixture for concrete production and can be applied in industry of building materials, in particular, in manufacturing products from concretes. Raw material mixture for concrete production contains, wt %: Portland cement 24-26; ash of coal burning 71.5-73.5; polyaminotriazole fibre cut into 5-15 mm long segments 1-1.5; sodium methylsiliconate 1-1.5, with water-cement ratio 0.45-0.5.

EFFECT: increased concrete strength.

1 tbl

FIELD: chemistry.

SUBSTANCE: crude mixture for making wall blocks contains the following, wt %: portland cement 26.0-30.0; quartz sand 66.8-70.9; spent car tyres crushed and sieved through sieve N2.5 1.0-1.5; asbestos 1.0-1.5; gypsum binder 0.4-0.6; dibutyl phthalate-plasticised polyvinyl acetate dispersion 0.1-0.2, with water to cement ratio of 0.5-0.55.

EFFECT: obtaining high-strength wall blocks.

1 tbl

Concrete mixture // 2537733

FIELD: chemistry.

SUBSTANCE: concrete mixture, which includes portland cement, expanded clay, haydite sand, water, further contains asbestos of 6-7 types, which is fluffed up in advance, gypsum binder, sodium methyl siliconate or sodium ethyl siliconate, with the following ratio of components, wt %: portland cement 26.0-30.0; expanded clay with particle size of 20-40 mm 46.0-48.0; haydite sand 5.0-8.5; asbestos of 6-7 types, which is fluffed up in advance, 0.5-1.0; gypsum binder 0.5-1.0; sodium methyl siliconate or sodium ethyl siliconate1.0-1.5; water 15.0-17.0.

EFFECT: high strength.

1 tbl

Concrete mixture // 2537731

FIELD: chemistry.

SUBSTANCE: concrete mixture includes, pts.wt: white cement 1, crushed marble with particle size of 2-8 mm 1-1.5, glass fibre with length of 3-7 mm 0.1-0.15, sodium ethyl siliconate 0.1-0.15, with water to cement ratio of 0.5-0.55.

EFFECT: high strength.

1 tbl

FIELD: chemistry.

SUBSTANCE: raw material mixture for concrete manufacturing contains, wt %: Portland cement 27.0-31.0; TPS fly ash 44.9-46.2; superplasticiser C-3 0.6-0.8, fibrous cermet 0.5-5.0; water 21.0-23.0.

EFFECT: increased strength of concrete.

1 tbl

Concrete mixture // 2537727

FIELD: chemistry.

SUBSTANCE: concrete mixture contains, wt %: portland cement 26.0-28.0; ash-slag filler 56.55-60.9; sodium ethyl silicate 1.0-1.4; polyethylene fibre cut into 5-10 mm pieces 0.05-0.1; water 12.0-14.0.

EFFECT: high frost resistance of concrete.

1 tbl

Concrete mix // 2536893

FIELD: construction.

SUBSTANCE: concrete mix includes Portland cement, crushed stone with particle size of 5-10, sand, water, a complex expansion agent containing alumina cement and crushed gypsum stone. Additionally, the complex expansion agent includes Glenium-51 superplasticising agent and aluminium powder at the following component ratio, wt %: Portland cement 17-21, granite macadam with particle size of 5-10 mm 31-33, sand of two fractions with particle size of 0.16-0.63 mm and 1.25-5 mm with fineness modulus of 2.7 31-37, complex expansion agent 3.3-6.6, and water is the rest. The complex expansion agent contains the following components, wt %: alumina cement with Al2O3 content of at least 35 wt % 69-72, crushed gypsum stone with SO3 content of at least 42 wt % 22-24, Glenium-51 superplasticising agent 3.2-7.9, and aluminium powder 0.8-1.1.

EFFECT: providing reliable contact of hardening concrete with surface of concreted space and compensation of shrinking deformations, which provides density and non-permeability of a contact-butt zone.

9 tbl

FIELD: construction.

SUBSTANCE: invention relates to erection of cast-in-situ structures in difficult-to-access areas, and namely to cast concrete mixtures for cast-in-situ concreting of building structures. A cast-in-situ concreting method of a stationary sea ice-resistant platform involves preparation of concrete mix by mixing of dry components: a binding agent - Portland-slag cement, quartz sand, granite crushed stone with fraction of 5-20 mm, fine crushed mineral filler - MP-1 powder, with water and additives - a plasticising agent based on polycarboxylates - Muraplast FK-63 and hardening retarder - Centrament Retard 390, till concrete mix of cast consistency with cone spread of 50-70 cm is obtained, and with delamination of not more than 0.4% and with preservation capacity of at least 3 hours, supply of concrete mix to a framework with a concrete pump at flow rate of 2500-3000 l/h, and hardening is performed under normal conditions during 28-60 days, at the following component ratio, wt %: Portland-slag cement 13.3-16.9, quartz sand 42.4-42.6, the above said crushed stone 25.3-27.9, mineral powder MP-1 6.6-6.8, the above said plasticising agent 0.1-0.2, the above hardening retarder 0.07-0.08, and water is the rest.

EFFECT: providing viscosity and preservation capacity of concrete mix at its supply, and improving concrete crack resistance.

4 tbl

Wood concrete mix // 2535578

FIELD: construction.

SUBSTANCE: wood concrete mix comprises, wt %: portland cement 34.3-36.0; rush cane stems cut into sections of 4-6 cm length with moisture of 10-12% 19.6-20.6; technical sulphur 3.1-3.6; chrome-containing sludge 1.5-1.7; pyrite stubs 6.2-7.2; water - balance.

EFFECT: use of wood concrete with simultaneous production of plastering base on its surface.

1 tbl

Concrete mixture // 2539450

FIELD: chemistry.

SUBSTANCE: invention relates to industry of building materials and can be used in production of foundation and wall blocks, wall panels, in constructions of bearing layer of concrete floors. Concrete mixture, including binding agent, crushed granite from dump blast furnace slag with fraction 5-20 mm, quartz sand and water, contains as binding agent multi-component mineral binding agent, consisting of, wt %: milled granulated blast furnace 48.3-56.0, milled converter slag 8.4-13.2, phosphogypsum 35.6-38.5, clinker - 5% of the sum of said components, with the following ratio of mixture components, wt %: said binding agent 14.2-15.7, said crushed granite 29.9-46.7, sand 30.3-45.0, water - the remaining part.

EFFECT: increased flexural strength with reduction of heat conductivity.

3 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to inorganic binding agents. System of inorganic binding agent includes, wt.p.: 10-30 of at least one latent hydraulic binding substance, selected from blast furnace slag, slag sand, milled slag, electrothermal phosphorus slag and metal-containing slag, 5-22 of at least one amorphous silicon dioxide, selected from precipitated silicon dioxide, pyrogenic silicon dioxide, microsilica and glass powder, 0-15 of at least one reactionable filler, selected from brown coal fly ash, mineral coal fly ash, metakaolin, volcanic ash, tuff, trass, pozzolan and zeolites, and 3-20 of at least one alkali metal silicate, and in which content of CaO is 12-25 wt %, setting requires 10-50 wt.p., latent hydraulic binding substance, amorphous silicon dioxide and optional said filler is present as first component and alkali metal silicate and water - as second component. System can be applied for obtaining hydraulically setting mortar.

EFFECT: increased resistance to action of acid, water and alkali.

6 cl, 3 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to raw material mixture for concrete production and can be applied in industry of building materials, in particular, in manufacturing products from concretes. Raw material mixture for concrete production contains, wt %: Portland cement 24-26; ash of coal burning 71.5-73.5; polyaminotriazole fibre cut into 5-15 mm long segments 1-1.5; sodium methylsiliconate 1-1.5, with water-cement ratio 0.45-0.5.

EFFECT: increased concrete strength.

1 tbl

FIELD: chemistry.

SUBSTANCE: crude mixture for making wall blocks contains the following, wt %: portland cement 26.0-30.0; quartz sand 66.8-70.9; spent car tyres crushed and sieved through sieve N2.5 1.0-1.5; asbestos 1.0-1.5; gypsum binder 0.4-0.6; dibutyl phthalate-plasticised polyvinyl acetate dispersion 0.1-0.2, with water to cement ratio of 0.5-0.55.

EFFECT: obtaining high-strength wall blocks.

1 tbl

Concrete mixture // 2537733

FIELD: chemistry.

SUBSTANCE: concrete mixture, which includes portland cement, expanded clay, haydite sand, water, further contains asbestos of 6-7 types, which is fluffed up in advance, gypsum binder, sodium methyl siliconate or sodium ethyl siliconate, with the following ratio of components, wt %: portland cement 26.0-30.0; expanded clay with particle size of 20-40 mm 46.0-48.0; haydite sand 5.0-8.5; asbestos of 6-7 types, which is fluffed up in advance, 0.5-1.0; gypsum binder 0.5-1.0; sodium methyl siliconate or sodium ethyl siliconate1.0-1.5; water 15.0-17.0.

EFFECT: high strength.

1 tbl

Concrete mixture // 2537731

FIELD: chemistry.

SUBSTANCE: concrete mixture includes, pts.wt: white cement 1, crushed marble with particle size of 2-8 mm 1-1.5, glass fibre with length of 3-7 mm 0.1-0.15, sodium ethyl siliconate 0.1-0.15, with water to cement ratio of 0.5-0.55.

EFFECT: high strength.

1 tbl

FIELD: chemistry.

SUBSTANCE: raw material mixture for concrete manufacturing contains, wt %: Portland cement 27.0-31.0; TPS fly ash 44.9-46.2; superplasticiser C-3 0.6-0.8, fibrous cermet 0.5-5.0; water 21.0-23.0.

EFFECT: increased strength of concrete.

1 tbl

Concrete mixture // 2537727

FIELD: chemistry.

SUBSTANCE: concrete mixture contains, wt %: portland cement 26.0-28.0; ash-slag filler 56.55-60.9; sodium ethyl silicate 1.0-1.4; polyethylene fibre cut into 5-10 mm pieces 0.05-0.1; water 12.0-14.0.

EFFECT: high frost resistance of concrete.

1 tbl

Concrete mix // 2536893

FIELD: construction.

SUBSTANCE: concrete mix includes Portland cement, crushed stone with particle size of 5-10, sand, water, a complex expansion agent containing alumina cement and crushed gypsum stone. Additionally, the complex expansion agent includes Glenium-51 superplasticising agent and aluminium powder at the following component ratio, wt %: Portland cement 17-21, granite macadam with particle size of 5-10 mm 31-33, sand of two fractions with particle size of 0.16-0.63 mm and 1.25-5 mm with fineness modulus of 2.7 31-37, complex expansion agent 3.3-6.6, and water is the rest. The complex expansion agent contains the following components, wt %: alumina cement with Al2O3 content of at least 35 wt % 69-72, crushed gypsum stone with SO3 content of at least 42 wt % 22-24, Glenium-51 superplasticising agent 3.2-7.9, and aluminium powder 0.8-1.1.

EFFECT: providing reliable contact of hardening concrete with surface of concreted space and compensation of shrinking deformations, which provides density and non-permeability of a contact-butt zone.

9 tbl

FIELD: construction.

SUBSTANCE: invention relates to erection of cast-in-situ structures in difficult-to-access areas, and namely to cast concrete mixtures for cast-in-situ concreting of building structures. A cast-in-situ concreting method of a stationary sea ice-resistant platform involves preparation of concrete mix by mixing of dry components: a binding agent - Portland-slag cement, quartz sand, granite crushed stone with fraction of 5-20 mm, fine crushed mineral filler - MP-1 powder, with water and additives - a plasticising agent based on polycarboxylates - Muraplast FK-63 and hardening retarder - Centrament Retard 390, till concrete mix of cast consistency with cone spread of 50-70 cm is obtained, and with delamination of not more than 0.4% and with preservation capacity of at least 3 hours, supply of concrete mix to a framework with a concrete pump at flow rate of 2500-3000 l/h, and hardening is performed under normal conditions during 28-60 days, at the following component ratio, wt %: Portland-slag cement 13.3-16.9, quartz sand 42.4-42.6, the above said crushed stone 25.3-27.9, mineral powder MP-1 6.6-6.8, the above said plasticising agent 0.1-0.2, the above hardening retarder 0.07-0.08, and water is the rest.

EFFECT: providing viscosity and preservation capacity of concrete mix at its supply, and improving concrete crack resistance.

4 tbl

FIELD: building materials, in particular concrete additives (plasticizer).

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

EFFECT: concrete mixtures with controlled flow characteristic and concrete curing rate.

2 cl, 4 ex

Up!