RU2338724C1 - Dry heat-insulating plastered cellular polystyrene construction mixture for coatings, items and structures and method of its preparation - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: dry heat insulating plastered cellular polystyrene construction mixture is described, which includes cellular polystyrene granules, mineral astringent, plastifying additive on the basis of lignosulfonates and water and differs by the fact that contains plaster astringent as mineral astringent, technical sodium lignosulfonates as additive on the basis of lignosulfonates, and additionally contains calcium hydroxide, sodium tripolyphosphate and sodium polycarboxylate with the following ratio of mixture components in wt %: cellular polystyrene granules 2.0-6.0; plaster astringent 91.0-96.0; technical sodium lignosulfonates 0.3-0.4; sodium polyphosphate 0.03-0.2; calcium hydroxide 1.3-1.9; sodium polycarboxylate 0.06-0.13; water - the rest. Also method is described for preparation of abovementioned dry heat insulating plastered plastered cellular polystyrene construction mixture.

EFFECT: increase of strength properties, water resistance, heat insulating properties, lower shrinkage, durability with reduction of material flow rate.

2 cl, 2 tbl, 17 ex

Description

The invention relates to the chemical industry, in particular, to compositions intended as means for simultaneously insulating, leveling surfaces, sealing joints and sealing them, and also, in particular, in the preparation of various surfaces before their subsequent finishing and can be used in various industries, for example, in construction, in mechanical engineering, in everyday life, in particular, in the construction of industrial and civil buildings, as well as in heat engineering.

The field of use of dry heat-insulating gypsum building mixtures extends not only to finishing plastering and repair work, but also in the construction of multilayer wall structures in a monolithic way, in the manufacture of heat-insulating panels, plates and blocks, interior partitions, when warming floors and ceilings.

The market of dry mixes is one of the most attractive for investment. Today, its growth rate is 50% per year. Demand for dry building mixes is formed due to two factors. The first factor is an increase in the volume of construction and, accordingly, finishing and repair work, which results in an increase in the demand for building materials, including dry building mixes. The second factor is an increase in the consumption of dry mixes per unit of repair and decoration works, which, in particular, is associated with an increase in the share of quality housing in the total volume of construction.

The bulk of the consumption of dry mortar (35% of the total market) is in large cities. New manufacturers are constantly appearing on the market of dry mixes, and the largest of them are successfully competing with foreign companies. Key import brands - Vetonit, Atlas, KNAUF. The dry mixes they offer are very expensive. The cost of dry mixes in the construction market ranges from 150 to 2000 rubles. for 25 liters of the mixture (bag).

Over the past 5 years, home builders have noted a significant increase in demand for floor levelers and self-leveling bulk compositions.

Dry mixes used as floor levelers, as well as mixtures for self-leveling floors, involve the use of Portland cement. The latter often does not meet the requirements of consumers, both in quality and especially in environmental parameters, having a radioactivity level of up to 50-180 Bq.

Highly ecological indicators, less than 8 Bq, correspond to dry mixtures only on a magnesian, or gypsum, or anhydrite basis.

The domestic industry produces such mixtures for flooring (levelers and self-leveling) in very limited quantities.

Currently known compositions of raw mixes for thermal insulation and methods for their preparation using organic polymers and inorganic binders (such as cement, gypsum, etc.) as binders, which are filled with gas upon receipt, and a light heat-insulating material is formed.

Heat-insulating materials are known, mainly foams (foamed or cellular plastics, gas-filled polymers), composite materials with a skeleton (matrix) of polymer films that form the walls and edges of the cells (pores) filled with gas (mainly air). (Chemical Encyclopedia. Scientific Publishing House, M., 1992, v. 3, pp. 454-460).

The most interesting and modern ones are integrated foams (structural, surface-compacted), gas-filled, polymer. Distinguish between single-component foams integrated and multicomponent from two or three different binders.

From RU 2237033, 09/27/2004, a raw material mixture is known for the manufacture of a heat-insulating material, including a urea-formaldehyde resin, a modifier, a surfactant, a hardener and water, while it contains a multi-component catalytic system as a hardener, which includes: urea, aluminum sulfate , phosphoric acid, hydroxide of divalent or trivalent metal, and synthetic butadiene-styrene or butadiene latex and, in addition, inorganic filler when determined ratio of components.

A method of manufacturing a heat-insulating material includes mixing the components, molding the mixture and curing. Mixing of the hardener and other components is carried out in a high-speed mixer at a speed of 700-1200 rpm for 9-10 s, and molding is carried out for 2-3 hours.

This material is not intended for leveling surfaces.

From SU 1520034, 11/07/1989, a known method for the manufacture of heat-insulating products, comprising mixing granules of expanded polystyrene semi-aquatic gypsum, mineral filler and water. To do this, the expanded polystyrene granules are soaked in a 10% aqueous solution of styrene-butadiene latex and kept for 4-6 hours, and semi-aquatic gypsum is mixed with expanded perlite sand. Then, the treated polystyrene granules are mixed with a mixture of gypsum and filler, and sprayed water is introduced with stirring in the following ratio of components, wt.%: Polystyrene foam granules treated with a 10% aqueous solution of styrene-butadiene latex 1.9-6.5; semi-aquatic gypsum 59.5-65.4; expanded perlite sand 1.9-9%; water the rest. The samples are characterized by a thermal conductivity coefficient of 0.061-0.135 W / m · K with a bulk density of 250-630 kg / m ³ . The time to set formwork strength is 15-20 minutes.

This method relates to the production of heat-insulating products that can be used for insulation of walls, ceilings, pipelines, etc., as well as a heat-insulating layer of multilayer walling.

From SU 346267, 18,12,1972, a raw material mixture is known including (wt.%): Semi-aquatic gypsum 14,1-53,8; foamed polymer - expanded polystyrene 1.6-4.2; ground limestone 17.7-42.3; water 26.9-39.4.

A disadvantage of the known technical solution is the relatively low mechanical strength in comparison with the values of bulk density and thermal conductivity, this mixture is intended only to obtain lightweight gypsum blocks and structures.

Also known is a composition for the manufacture of filling material (A.S. USSR 1728199, 04/23/1992), including gypsum-cement-pozzolanic binder (ГЦПВ), latex, polystyrene foam granules and water, which additionally contains a foaming agent and calcium chloride in the ratio of components, wt.% : GCPV 49.64-53.16; latex 7.97-12.41; polystyrene granules 9.03-10.67; a foaming agent 1.59-1.81; calcium chloride 0.05-0.45 and water - the rest.

The disadvantage of this technical solution is the low strength and high heterogeneity of the material obtained.

Structurally-insulating polystyrene concrete are widely known in the prior art.

Polystyrene concrete is known (GOST 51263-99, developed by the All-Russian Research Institute of Iron Reinforced Concrete), consisting of polystyrene foam aggregate, Portland cement or slag Portland cement, additives and water.

A known composition for the manufacture of a polystyrene mixture (RF patent 2150446, 06/10/2001), including wt.%: Mineral binder 68-90, polystyrene aggregate 0.7-2.3, fibrous material 1.4-5.2, air-borne additive 0 , 3-0.7, a plasticizing additive 0.25-0.55 and water - the rest, moreover, as a polystyrene aggregate it contains a mixture of particles of expanded polystyrene granules of a fraction of 0.04-1.25 mm and / or particles of torn expanded polystyrene fraction 0.04-1.6 mm with a mass ratio of 1: (8-12).

The disadvantage of this technical solution is the low mechanical strength of the material and the lack of environmental protection from volatile organic impurities.

From RU 2169132, 06/20/2001, environmentally friendly polystyrene concrete for the manufacture of insulating products is known.

Polystyrene concrete is obtained from a mixture including a composite binder based on activated technogenic waste of aluminosilicate composition, polystyrene foam aggregate, air-entraining and water-reducing (plasticizing) additives and water. The binder as activated technogenic waste contains blast furnace or electrothermophosphorus gravel slag with a specific surface area of 2800-3500 cm ² / g and / or bauxite sludge, and / or converter gravel slag ground to a specific surface of 3200-3500 cm ² / g and has the following composition: specified waste 55-95, cement clinker 0-40, gypsum 0-5, sodium chloride 0-5, powdered C-3 0-3.

The mixture as a filler contains polystyrene gravel fraction 0-10 mm bulk density 10-30 kg / m ^{3 the} following grain composition, vol.%: Fractions 5-10 mm 15-30; 2.5-5 mm 20-35; 1.25-2.5 mm 30-40; 0-1.25 mm 20-30, and as a water-reducing additive used lignopan-B in the following ratio of the components of the mixture, wt.%: Binder 53.57-71.65; placeholder 1.73-11.37; air entraining additive 0.06-0.31; water reducing additive 0.37-0.68; water is the rest.

A known method of preparing a polystyrene mixture (RF patent 2103241), which consists in preparing a mixture containing clay, expanded polystyrene and water, laying the mixture in the space of the belt of bricks, mix and carry out electrical heating to a temperature of 40-45 ° C with a heating rate of 100 -120 ° C / h.

From RU 2230717, 06/20/2002, a method is known for producing structurally heat-insulating environmentally friendly polystyrene concrete from a mixture including a mineral binder, polystyrene foam aggregate, a complex additive and water, while to increase the strength, polystyrene foam aggregate is used with a density of 5-20 kg / m ^{3 of} fractional composition , vol.%:

Fraction size, mm

5-10 2-10

2.5-5 85-90

1.25-2.5 4-6

0-1.25 1-2

In the following ratio of components of the mixture, wt.%:

Mineral binder 49-73.5 Specified Expanded Polystyrene Aggregate 1,2-12 Complex supplement 0.75-1.50 Water rest

The above monofraction composition of the aggregate is optimal (see table 1).

To reduce the coefficient of thermal conductivity of polystyrene concrete without reducing the strength, the mineral binder contains Portland cement or slag Portland cement, a mineral-polymer additive and finely ground slag in the following ratio of components, wt.%:

Portland cement or slag Portland cement 40-100 Mineral-polymer additive 0-5 Fine slag 0-55

Mineral-polymer additive contains a polymer in an amount of 4.0-10% of its total mass.

The complex additive includes air-entraining, plasticizing additives and a hardening accelerator in the following ratio of components, wt.%:

Airborne Additive 15-100 Plasticizing additive 0-35 Hardening accelerator 0-50

As a plasticizing additive, polystyrene concrete contains modified lignosulfates in an amount of 0.15-0.3% by weight of a binder or chemical polycondensation products of aromatic sulfonated hydrocarbons based on naphthalene, melamine or waste from their production in an amount of 0.3-0.5% by weight astringent.

As a hardening accelerator, polystyrene concrete contains a water-soluble salt - sulfate or chloride of an alkaline and alkaline-earth metal in an amount of 0.5-1% by weight of the binder.

Polystyrene concrete is prepared in the following way, which includes the following main stages: production of polystyrene foam aggregate, preparation of a mixture from the specified aggregate, mineral binder, complex additives and water, its distribution and compaction in molds, hardening and stripping, using the polystyrene concrete described above, the production of polystyrene foam is carried out by foaming according to single or multi-stage technology at a temperature of 60-105 ° C, and the mixture is prepared in the following order: in beta onomixer serves the calculated amount of the specified polystyrene foam aggregate, moisten it with 1 / 3-1 / 45 hours of mixing water, mix for 5-20 seconds, and then simultaneously supply a mineral binder, a complex additive, the rest of the water, mix for at least 2.0 minutes until a homogeneous mixture of a given density is obtained, the freshly prepared mixture is distributed in forms, subjected to compaction by vibration for 15-60 s, hardening is carried out under load, providing a pressure of at least 0.03 MPa, under natural conditions, silt heat treatment with hot steam, or electric heating according to the mode: preliminary exposure for 0.5-1 h, temperature rise to 50-60 ° C for at least 1 h, thermos holding for at least 3 h at a temperature of 60-85 ° C, formwork is carried out when polystyrene concrete reaches the stripping strength of at least 0.2 MPa.

A known method of obtaining a composition for coating a colorless plasticizing paint, etc., involving the dissolution of expanded polystyrene in a softening solvent and the subsequent receipt of various products by mixing with sawdust, slag, etc. (see French application 2405283, Cl. C09D 3/727, 1979).

From SU 1616877, 12/30/1990, a composition for preparing a dry stucco mixture is known. The composition includes, wt.%: Gypsum binder 88.8-93.9; Na-carboxymethyl cellulose 2.0-4.0; sodium tripolyphosphate 0.1-0.2; bentonite or kaolin 3.0-5.0; solid ground lignosulfonates 1.0-2.0. Adhesion to the base (substrate) 0.5-0.6 MPa, the viability of the gypsum slurry 2.5-3.5 hours. A dry stucco mixture was prepared by mixing and grinding in a vibratory mill gypsum binder, Na-carboxymethyl cellulose, sodium tripolyphosphate, bentonite (or kaolin ) and solid ground lignosulfonates. Grinding the mixture was carried out for 15-20 minutes. When preparing the suspension, the dry mixture was shut with water at W / G = 0.5.

However, this dry mixture does not provide thermal insulation properties.

From SU 1613469, 1990, a dry mortar for the preparation of adhesives is known, including a calcium-containing mineral substance, which is used as a gypsum binder, water-retaining additive and sodium tripolyphosphate as an additive that regulates the setting time of the closed mixture. The mixture contains technical casein and solid lignosulfonates in the following ratio of components, wt.%:

Gypsum binder 88.5-94.7 Sodium Tripolyphosphate 0.3-0.5 Technical casein 4.0-8.0 Solid lignosulfonates 1.0-3.0

This mixture is used during interior finishing work and does not provide thermal insulation properties.

From RU 2237035, 27.09,2004, another dry stucco mixture is known, which contains, wt.%: Gypsum 90-92; perlite 2.5-3.1; lime 1.2-1.5; limestone flour 4.0-5.0; Moderator 0.035-0.045; ether cellulose 0.13-0.16; redispersed powder 0.018-0.03; air entraining additive 0.008-0.015; starch ether 0.09-0.1; technical sodium tripolyphosphate 0.04-0.045. As an air-entraining additive, Bermodoll AEA2800 is used - nonionic hydrophilic powder, saponified wood pitch, sodium abietate.

This mixture is used for plastering walls and also does not provide the necessary thermal insulation properties.

As the closest analogue (prototype), the well-known building mixture for obtaining a heat-insulating material and the method of its manufacture according to the aforementioned patent RU 2230717 are selected.

The technical task of the claimed invention is to increase the strength properties, water resistance, heat insulating properties, as well as reducing shrinkage, durability while reducing material consumption.

The technical task is achieved by the claimed group of the invention, which includes the composition of the dry heat-insulating mixture, as well as the method of its manufacture.

So, the technical task is achieved by dry heat-insulating gypsum-foam polystyrene building mixture, including polystyrene granules, a mineral binder, a plasticizing additive based on lignosulfonates and water, contains a gypsum binder as a mineral binder, technical sodium lignosulfonates as an additive based on lignosulfonates, and additionally contains sodium tripolyphosphate and sodium polycarboxylate in the following ratio of components of the mixture, wt.%:

polystyrene granules 2.0-6.0 gypsum binder 91.0-96.0 technical sodium lignosulfonates 0.3-0.4 sodium tripolyphosphate 0.03-0.2 calcium hydroxide 1.3-1.9 sodium polycarboxylate 0.06-0.13 water rest

The stated technical problem is also achieved by a method of manufacturing a dry heat-insulating gypsum-foam polystyrene building mixture, including processing particles of polystyrene foam particles (granules) with an aqueous solution of a mixture containing technical sodium lignosulfonates, sodium tripolyphosphate and sodium polycarboxylate, with stirring until the polystyrene foam particles are completely wetted, followed by dusting moistened particles (granules) of expanded polystyrene with stirring successively with calcium hydroxide powder and oshkom gypsum binder, drying of the particles (granules) polystyrene and mixing them with the remaining amount of gypsum binder.

As polystyrene foam, polystyrene foam is used in the form of particles (in particular, in the form of granules) up to 3 mm in size, for example, in the size of 1.25-2.5 mm or 2.5-3.0 mm. As a gypsum binder, for example, building gypsum is used.

The following examples 1-15 illustrate the invention, but do not limit it. Examples 16-17 are control. Table 1 shows the examples of the invention and the control, and examples 1-9 were used to obtain the base of the floor, example 10 for the manufacture of wall panels, example 11 for ceiling devices, example 12 for sealing joints, example 15 for plastering a concrete wall.

EXAMPLE 1. 160 l (2.5 kg or 3.3 wt.%) Polystyrene foam was loaded into the mixer with a particle size of up to 3 mm, into which 1 l of a solution containing technical sodium lignosulfonate was fed - 250 g / l (0.25 kg or 0.33 wt.%), Sodium tripolyphosphate - 30 g / l (0.03 kg or 0.04 wt.%) And sodium polycarboxylate - 80 g / l (0.08 kg or 0.11 wt.%), and expanded polystyrene was mixed with a solution of a complex additive until the surface of the expanded polystyrene was completely wetted. Then, while continuing to mix, the moistened particles of expanded polystyrene were dusted with 2 L (1 kg or 1.3 wt.%) Calcium hydroxide powder, and then the surface of the moistened particles of expanded polystyrene was further dusted with stirring.

5 l (5.4 kg or 7.2 wt.%) Of building gypsum binder powder. The polystyrene foam thus treated was dried to remove 10% moisture. The obtained powdered polystyrene particles were then mixed in a mixer with 60 L (65 kg or 86.8 wt.%) Of a gypsum building binder. The resulting dry gypsum-polystyrene mixture was analyzed and tested, forming samples at a water-gypsum ratio of 0.6, and drying them to constant weight. Next, 15 kg of the obtained dry heat-insulating mixture was mixed with 5.6 l of water for 5 minutes and then the resulting mass was unloaded from the mixer onto the concrete floor base and the wet gypsum-polystyrene mass was leveled with a 5 cm thick layer using a leveling vibrating rail. The test results are shown in table.2.

EXAMPLE 2. Received, as in example 1. Next, 30 kg of the obtained dry insulating mixture was mixed with 7.1 l of water for 4 minutes and then the resulting mass was unloaded from the mixer onto the concrete floor base and the moist gypsum-foam polystyrene mass was leveled with a layer 15 cm thick with using a leveling vibrating rod. The test results are shown in table.2.

EXAMPLE 3. The procedure was performed as in Example 1. Next, 20 kg of the obtained dry heat-insulating mixture was mixed with 6.2 L of water for 5 minutes, and then the resulting mass was unloaded from the mixer onto the concrete floor base and the wet gypsum-polystyrene mass was leveled with a layer 10 cm thick with using a leveling vibrating rod. The test results are shown in table.2.

EXAMPLE 4. Received, as in example 1. Next, 15 kg of the obtained dry heat-insulating mixture was mixed with 5.6 l of water for 5 min and then the resulting mass was unloaded from the mixer onto the concrete floor base and the moist gypsum-foam polystyrene mass was leveled with a layer 10 cm thick using a leveling vibrating rod. The test results are shown in table.2.

EXAMPLE 5. Received, as in example 1. Loaded in the mixer 200 l (3.1 kg or 4.0 wt.%) Polystyrene foam with a particle size of up to 3 mm, into which was fed 1 l of a solution containing technical sodium lignosulfonate - 300 g / l (0.3 kg or 0.4 wt.%), sodium tripolyphosphate - 20 g / l (0.02 kg or 0.02 wt.%) and sodium polycarboxylate - 100 g / l (0.1 kg or 0 , 1 wt.%), And expanded polystyrene was mixed with a solution of a complex additive until the surface of the expanded polystyrene was completely wetted. Then, while continuing to mix, the moistened particles of expanded polystyrene were dusted with 2.5 L (1.3 kg or 1.6 wt.%) Calcium hydroxide powder, after which they were further dusted with stirring for a particle mass of 6 L (6.5 kg or 8.2 wt. .%) gypsum binder powder. The polystyrene foam thus treated was dried to remove 15% moisture. The obtained powder particles of expanded polystyrene were then mixed in a mixer with 60 l (65 kg or 84.8 wt.%) Of a gypsum building binder. Further, as in example 1.

EXAMPLE 6. Downloaded into the mixer 250 l (3.9 kg or 5.1 wt.%) Polystyrene foam with a particle size of up to 3 mm, into which 1 l of a solution containing technical sodium lignosulfonate - 250 g / l (0.25 kg or 0.3 wt.%), Sodium tripolyphosphate - 30 g / l (0.03 kg or 0.04 wt.%) And sodium polycarboxylate - 50 g / l (0.05 kg or 0.06 wt.%), and expanded polystyrene was mixed with a solution of a complex additive until the surface of the expanded polystyrene was completely wetted. Then, while continuing to mix, the moistened particles of polystyrene foam were dusted with 2 l (1 kg or 1.3 wt.%) Of calcium hydroxide powder, after which the particles were further dusted with stirring of a mass of 5 l (5.4 kg or 7.1 wt.%) Of powder building gypsum binder. The resulting powdery polystyrene particles were then mixed in a mixer with 60 L (65 kg or 85.2 wt.%) Of a gypsum building binder. The polystyrene foam thus treated was dried to remove 20% moisture. Further, as in example 1.

EXAMPLE 7. 300 l (4.7 kg or 5.3 wt.%) Of polystyrene foam were loaded into the mixer with a particle size of up to 3 mm, into which 1 l of a solution containing technical sodium lignosulfonate was fed - 250 g / l (0.25 kg or 0.3 wt.%), Sodium tripolyphosphate - 30 g / l (0.03 kg or 0.04 wt.%) And sodium polycarboxylate - 100 g / l (0.1 kg or 0.1 wt.%), and expanded polystyrene was mixed with a solution of a complex additive until the surface of the expanded polystyrene was completely wetted. Then, while continuing to mix, the moistened particles of polystyrene foam were dusted with 2 l (1 kg or 1.5 wt.%) Of calcium hydroxide powder, after which the particles were further dusted with stirring of 4 l (4.4 kg or 5.7 wt.%) Of powder building gypsum binder. Further, as in example 1.

EXAMPLE 8. 150 l (1.5 kg or 2.0 wt.%) Of expanded polystyrene with a particle size of up to 3 mm were loaded into the mixer, into which 1 l of a solution containing technical sodium lignosulfonate - 250 g / l (0.25 kg or 0.3 wt.%), Sodium tripolyphosphate - 90 g / l (0.09 kg or 0.1 wt.%) And sodium polycarboxylate - 50 g / l (0.05 kg or 0.06 wt.%), and expanded polystyrene was mixed with a solution of a complex additive until the surface of the expanded polystyrene was completely wetted. Then, while continuing to mix, the moistened particles of polystyrene foam were dusted with 2 L (1 kg or 1.3 wt.%) Calcium hydroxide powder, after which the particles were further dusted with stirring of 4.8 L (5.0 kg or 6.7 wt.%) ) gypsum binder powder. The obtained powdered polystyrene particles were then mixed in a mixer with 65 L (69 kg or 89.2 wt.%) Of a gypsum building binder. Further, as in example 1.

EXAMPLE 9. 280 l (4.6 kg or 6.0 wt.%) Of expanded polystyrene with a particle size of up to 3 mm were loaded into the mixer, into which 1 l of a solution containing technical sodium lignosulfonate — 300 g / l (0.3 kg or 0.4 wt.%), Sodium tripolyphosphate - 130 g / l (0.13 kg or 0.2 wt.%) And sodium polycarboxylate - 100 g / l (0.1 kg or 0.1 wt.%), and expanded polystyrene was mixed with a solution of a complex additive until the surface of the expanded polystyrene was completely wetted. Then, while continuing to mix, the moistened particles of polystyrene foam were dusted with 3 L (1.5 kg or 2.0 wt.%) Calcium hydroxide powder, after which the particles were further dusted with stirring of 5 l (5.4 kg or 7.0 wt.%) ) building gypsum binder powder. Further, as in example 1.

EXAMPLE 10. The procedure was performed as in Example 1. Next, 15 kg of the obtained dry heat-insulating mixture was mixed with 5.8 L of water for 5 min and then the resulting mass was unloaded from the mixer into the shape of a wall panel, leveling the wet gypsum-foam polystyrene mass with respect to the thickness of the panel. After the mass hardened, the wall panel was removed from the mold and dried at 50 ° C to a residual moisture content of not more than 12%. The test results are shown in table.2.

EXAMPLE 11. Acted as in example 1. The polystyrene foam thus treated was dried to remove 10% moisture. The resulting powdery polystyrene particles were then mixed in a mixer with 60 L (65 kg or 86.8 wt.%) Of a gypsum building binder. The resulting dry gypsum-polystyrene mixture was analyzed and tested, forming samples at a water-gypsum ratio of 0.6, and drying them to constant weight. Further, 15 kg of the obtained dry heat-insulating mixture was mixed with 5.8 L of water for 5 minutes and then the resulting mass was unloaded from the mixer onto the ceiling surface, leveling the moist gypsum-polystyrene foam mass with a layer of 15 cm thick using a leveling vibrating rail. Further, as in example 1. The test results are shown in table.2.

EXAMPLE 12. Received, as in example 1. Next, 30 kg of the obtained dry heat-insulating gypsum mixture was mixed with 8 l of water for 5 minutes and then this fluid mass was poured into a limited space between a concrete or stone wall and formwork. Upon hardening of the monolithic heat-insulating layer, the formwork was removed. Further, as in example 11.

EXAMPLE 13. Received, as in example 1. Next, 15 kg of the obtained dry heat-insulating mixture was mixed with 6.0 l of water for 4 minutes and then the resulting mass was unloaded from the mixer into a cassette for blocks of 200 × 200 × 400 mm in size. Upon hardening of the gypsum-polystyrene mass, the blocks were removed from the molds and dried, as in example 12. Next, as in example 1.

EXAMPLE 14. Received as in example 1. Next, 15 kg of the obtained dry insulating mixture was mixed with 6.0 l of water for 4 minutes and then the resulting mass was unloaded from the mixer into a cassette for plates with a size of 500 × 600 × 80 mm. Upon hardening of the gypsum-polystyrene mass, the plates were taken out of the molds and dried, as in example 12. Further, as in example 1.

EXAMPLE 15. They acted as in example 13. Next, the resulting wet mass of gypsum expanded polystyrene was poured onto a concrete wall, previously plastering it with this mass and leveling it with a 10 mm thick layer, followed by plastering the wall with a hardened gypsum-polystyrene layer of known 2-3 mm thick gypsum sand . Further, as in example 1.

EXAMPLE 16 (control). 160 l (2.5 kg or 3.3 wt.%) Polystyrene foam was loaded into the mixer with a particle size of up to 3 mm and polystyrene foam was mixed with 106.7 l (97.5 kg or 96.7 wt.%) Of a gypsum building binder. The obtained dry gypsum-polystyrene mixture was analyzed and tested, forming samples at a water-gypsum ratio of 0.6, and drying them to constant weight. The test results are shown in table.2.

EXAMPLE 17 (prototype - control). 280 l (4.6 kg or 6.0 wt.%) Of expanded polystyrene with a particle size of up to 3 mm were loaded into the mixer, into which 70.1 kg (92.2 wt.%) Of 300 grade Portland cement was fed; 1 kg (1.3 wt.%) Silica fume and powder 0.3 kg (0.4 wt.%) Of technical sodium lignosulfonate, the mixture was mixed and then tested as a floor leveler when mixing it with water at a water-solid ratio of 0.7. Test samples were formed from this dry mixture. The test results are shown in table.2.

As follows from the data of Table 2, the claimed group of inventions allows to reduce the consumption of material when using it for the manufacture of products and coatings, while reducing their shrinkage and increase the strength properties and water resistance, which generally increases the durability of products (materials) and coatings obtained on the basis of heat insulating mixture according to the invention.

Thus, the dry heat-insulating gypsum-foam polystyrene mixture according to the invention can be used for the following purposes:

- for leveling the floor - leveler and insulation;

- for layer-by-layer warming plaster of walls of premises;

- for the manufacture of heat-insulating wall panels, plates and blocks by casting in molds;

- for the manufacture of multilayer wall structures manufactured using formwork;

- for insulation of ceilings and roofs.

Claims (2)

1. Dry heat-insulating gypsum-foam polystyrene building mixture, including polystyrene foam granules, mineral binder, a plasticizer based on lignosulfonates and water, characterized in that it contains a gypsum binder as a mineral binder, sodium lignosulfonates as an additive based on lignosulfonates, and additionally contains sodium lignosulfonates and additionally contains sodium tripolyphosphate and sodium polycarboxylate in the following ratio of components of the mixture, wt.%: polystyrene foam granules 2.0-6.0 gypsum binder 91.0-96.0 technical sodium lignosulfonates 0.3-0.4 sodium tripolyphosphate 0.03-0.2 calcium hydroxide 1.3-1.9 sodium polycarboxylate 0.06-0.13 water rest 2. A method of manufacturing a dry heat-insulating gypsum-foam polystyrene mortar according to claim 1, comprising treating polystyrene granules with an aqueous solution of a mixture containing technical sodium lignosulfonates, sodium tripolyphosphate and sodium polycarboxylate with stirring until the surface of the polystyrene foam granules is completely wetted, followed by dusting of the moistened polystyrene foam granules with sequential mixing calcium hydroxide and part of the gypsum binder powder of all its used amount, according to drying the granules of expanded polystyrene and mixing them with the remaining amount of gypsum binder.