RU2577348C1 - Reinforced plaster-polysterene concrete mixture - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to construction materials and can be used for making plaster-polysterene concrete articles used in bearing and enclosing structures of buildings. Reinforced plaster-polysterene concrete mixture containing the following components per 1 m³ of the mixture: Portland cement 10.0-50.0 kg, gypsum or anhydrite, or their mixture in any ratio 60.0-250.0 kg, tripoli or gaize, or diatomite, or their mixture in any ratio of 7-75 kg, crushed polystyrene or mixture in any ratio with foamed granulated polystyrene 0.70-0.98 m³, chrysotile asbestos fibre 10.0-25.0 kg, plasticising additive S-3 0.03-1.40 kg, 10 % solution of polyacrylamide 0.40-0.60 kg, water-soluble methyl cellulose ether or construction cellulose or carboxymethylated starch 0.01-0.05 kg, tartaric or citric, or hydroxyethylidene diphosphonic acid 0.01-0.20 kg, water 20.0-140.0 litres.

EFFECT: technical result consists in faster setting of the mixture, hardening and strength of products, characterised by low density, heat conductivity, high water resistance and frost resistance, recycling wastes of styrofoam.

1 cl, 5 ex

Description

The invention relates to the field of building materials and can be used for the manufacture of gypsum-polystyrene concrete products used in the supporting and enclosing structures of buildings.

One of the most important problems of modern construction is the construction of facilities with high energy-saving characteristics. For this, polystyrene concrete mixtures based on a hydraulic binder are widely used. To reduce the construction time, it is advisable to make a polystyrene concrete mixture on the basis of a quick-hardening binder. In addition, it is advisable to use waste from various industrial and economic activities as components, which will allow increasing the anthropogenic pressure on the environment with less intensity. One of the directions of waste disposal is the reuse of polystyrene from packaging material as a filler. These wastes significantly pollute the environment and occupy large areas, excluding them from useful use. To ensure uniform distribution of polystyrene granules in the product and to prevent delamination of the mixture during transportation and laying, it is reinforced with an alkali-resistant fiber, such as basalt. However, at present there is a more effective, in the considered aspect, alkali-resistant substance, for example, from chrysotile asbestos.

Known polystyrene concrete mixture (RF patent No. 2338725 С04В 38/08 from 11/20/2009), containing the mass part: Portland cement 10.0-15.0; water-holding additive - a water-soluble cellulose ether polymer 0.02-0.06; granular polystyrene foam - fractions 0.8-1.3 mm - 0.1-0.2, 1.6-2.0 mm - 0.3-0.8; 2.4-3.0 mm - 0.1-0.3.

A known mixture to a method for the manufacture of polystyrene concrete products (RF patent No. 2223931 С04В 38/08 of 02/20/2004), including components, mass%: Portland cement - 68-70; expanded polystyrene - 3-6; saponified wood resin (on dry matter) - 0.02-0.1; plasticizing additive (dry matter) - 0.1-0.2; water - the rest; the reinforcing material in the form of threads and rods (in excess of 100%) is 5-12, while the reinforcing material is installed in the formwork where the polystyrene concrete mixture is fed, and the threads and rods of the reinforcing material have a diameter equal to (0.5-3) the average diameter of the granules polystyrene, and are connected by transverse rods with a diameter (1-4) of the average diameter of polystyrene granules.

The disadvantage of this solution is the intensive formation of shrinkage cracks due to the fact that polystyrene granules are not interconnected by reinforcement. In addition, the use of Portland cement as a binder determines the long hardening and curing times.

The known composition of the polystyrene concrete mixture (RF patent No. 2150446 С04В 38/08 from 10.06.2000,), including the mass%: mineral binder - 68-90; polystyrene aggregate - 0.7-2.3; fibrous material - 1.4-5.2; air-entraining 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 polystyrene foam of a fraction of 0.04-1, 63 mm with a mass ratio of 1: (8-12). Alkali-resistant fiber (fiberglass or mineral wool) is provided as a reinforcing fibrous material.

The disadvantage of this mixture is the high complexity of molding a homogeneous mass, which leads to low quality products due to the formation of shrinkage cracks. In addition, for the manufacture of products from a mixture of the specified composition requires heat treatment, which leads to the need for energy.

The prototype of the claimed composition is a reinforced polystyrene concrete mixture (RF patent No. 2309134 С04В 38/08 from 10/27/2007), including kg / m ³ : Portland cement - 160-170; polystyrene aggregate - 15-17; alkali-resistant mineral fiber in the form of basalt fiber - 0.5-0.7; structure-forming additive in the form of polyacrylamide (10% solution) - 0.4-0.6; plasticizing additive C-3 - 1.5-2.5; hardening regulator lignopane B-2 - 0.35-0.50; water - 50-55.

The disadvantage of the prototype is the long hardening, hardening of the mixture and the set of strength products from it. The beginning of the setting period is not earlier than 45 minutes, the end - no later than 10 hours. Standard strength is determined after 28 days. To reduce the setting time in the prototype provides an accelerator-plasticizer lignopane B-2. However, even when using an accelerator-plasticizer, it is possible to dismantle the product no earlier than 24 hours after laying the mixture. This does not allow to reduce the technological duration of the manufacture of products, for example, piece blocks, panels, as well as monolithic structures, for example, walls, partitions, insulation, etc. The long production time of products is also a disadvantage of the prototype.

The disadvantage of the prototype is also the intense formation of shrinkage cracks due to the inability to create a homogeneous mixture. The impossibility of creating a homogeneous mixture is due to the fact that when the components are mixed, the fragile basalt fibers break, are crushed and after that they are not reinforcing elements that bind together polystyrene aggregate granules. The uneven distribution of aggregate granules in the volume of the molded products leads to a decrease in their strength and deterioration of thermal characteristics.

The disadvantage of the prototype is the inability to dispose of waste polished polystyrene from packaging and heat-insulating material that accumulates in landfills (landfills).

The technical result of the invention is to reduce the setting time of the gypsum-polystyrene mixture, its hardening and strength gain in products whose properties are characterized by low density and thermal conductivity, as well as high water resistance and frost resistance in combination with strength indicators for products with a density of 100-500 kg / m ³ . The technical result of the invention is also the possibility of recycling polystyrene waste from packaging and insulating elements.

The technical result is achieved in that the composition for producing reinforced gypsum-polystyrene concrete mixture includes Portland cement, polystyrene aggregate, alkali-resistant mineral fiber, 10% polyacrylamide solution, plasticizing additive C-3, hardening regulator, water, gypsum or anhydrite, or a mixture of any proportion , water-soluble methyl cellulose ether or construction cellulose, or carboxymethyl starch, and crushed polystyrene or a mixture in any proportion with foamed foam as a filler m polystyrene, as an alkali-resistant mineral fiber - chrysotile asbestos fiber, as a hardening regulator - tartaric, or citric, or hydroxyethylidene diphosphonic acid, and the components have the following ratio per 1 m ^{3 of the} mixture: Portland cement, kg - 10.0-50.0 ; gypsum or anhydrite or a mixture thereof in any proportion, kg - 60.0-250.0; crushed polystyrene or a mixture in any proportion with foamed granular polystyrene, m ³ - 0.70-0.98; chrysotile asbestos fiber, kg - 10.0-25.0; plasticizing additive C-3, kg - 0.03-1.40; 10% solution of polyacrylamide, kg - 0.40-0.60; water-soluble methyl cellulose ether or construction cellulose, or carboxymethylated starch, kg - 0.01-0.05; tartaric or citric or hydroxyethylidene diphosphonic acid, kg - 0.01-0.20; tripoli or flask, or diatomite, or their mixture in any proportion, kg - 7-75; water, l - 20.0-140.0.

The specified qualitative and quantitative composition makes it possible to obtain in a simple way a gypsum-polystyrene concrete mixture with uniform distribution of granules in volume and with minimal shrinkage deformations, not delaminating and not setting during the predicted time, sufficient for transportation from the place of preparation and mixing of the mixture to the place of its laying and manufacturing of the product .

The content of the components in the mixture below or above the specified limits negatively affects the resistance to delamination, ease of mixing of the components, workability of the closed mixture, strength, thermal conductivity, water and frost resistance of products made of gypsum-polystyrene concrete mixture according to the claimed technical solution.

The mineral binder in the gypsum-polystyrene concrete mixture consists of a mixture of Portland cement, gypsum or anhydrite or any mixture thereof in any proportion, a mineral additive (tripoli or flask, or diatomite, or their mixture in any proportion) and is intended for bonding together elements of crushed or granular polystyrene, or mixtures thereof, reinforced with alkali-resistant mineral fiber. When mixed with water, the mineral binder forms a conveniently processed dough, capable of adhesion to both polystyrene and alkali-resistant mineral fiber, and hardens in water and in air. The composition of the mineral binder includes a mixture in the ratio, kg / m ³ : (10-50) :( 60-250) :( 7-75) Portland cement with gypsum, semi-aquatic or with anhydrite, or any mixture thereof in any proportion and tripoli or flask, or diatomite, or mixtures thereof in any proportion.

Portland cement is included in the composition of the mixture to give the mineral binder the properties of a hydraulic binder, as well as to provide the required strength characteristics of the product, controlled by the amount of input material. The amount of Portland cement included in the mineral binder according to the claimed solution is from 10 to 50 kg / m ³ .

Justification of the quantitative limits of Portland cement in the composition of the mineral binder according to the claimed solution.

The lower limit of the amount of Portland cement (10 kg per 1 m ^{3 of the} mixture) is due to the fact that with a smaller amount of gypsum it does not acquire the properties of a hydraulic binder and cannot be used in the manufacture of products requiring water resistance.

Exceeding the upper value of the amount of added Portland cement (50 kg per 1 m ^{3 of the} mixture) does not lead to an improvement in the water resistance properties. The addition of a hydraulic binder in the indicated amounts makes it possible to obtain products from gypsum-polystyrene concrete with properties corresponding to the objective of the invention.

Gypsum as the main mineral binder is intended for bonding polystyrene grains into a single mass with a certain strength after hardening. The amount of gypsum is 60-250 kg / m ³ . For practical use, the most appropriate is the use of semi-aquatic gypsum construction. Compared with the hydraulic binder used in analogues, gypsum can significantly reduce the time required to set the stripping strength of the mixture and increase the intensity of the manufacturing process. Instead of semi-aquatic gypsum, the mixture may include anhydrite in the same amount or any mixture in any proportion.

Justification of the limits of the amount of gypsum in the mixture.

The introduction of the amount of gypsum into the mixture is less than the lower value (60 kg per 1 m ^{3 of the} mixture) leads to the fact that part of the voids between the grains of polystyrene remains unfilled with a binder. As a result, delamination of the mixture and a decrease in its strength indicators are observed. When using the amount of gypsum more than the upper value (250 kg per 1 m ^{3 of the} mixture), the bulk mass of the product increases with a significant deterioration in the thermal characteristics.

A mineral additive in the form of tripoli or flask, or diatomite, or a mixture thereof in any proportion is necessary to give the mineral binder the properties of a hydraulic binder. The amount of mineral additives is from 7 to 75 kg per 1 m ^{3 of the} mixture.

When this mineral additive is introduced in an amount of less than 7 kg per 1 m ^{3 of the} mixture, the properties of the hydraulic binder in the mineral binder do not appear. This does not allow to obtain the desired technical result.

With the introduction of the specified mineral additives in an amount of more than 75 kg per 1 m ^{3 of the} mixture, the strength and thermal insulation properties of the products from the inventive mixture are reduced. This does not allow to obtain the desired technical result.

Polystyrene aggregate, obtained by grinding polystyrene packaging material or in the form of expanded polystyrene, is necessary to give products high thermal properties. The range of polystyrene quantities is due to the need to manufacture products with pre-designed thermotechnical and physico-mechanical characteristics.

Justification of the quantitative limits of polystyrene aggregate.

The lower value (0.7 m ³ per 1 m ^{3 of the} mixture) is due to the need to uniformly fill the entire volume with a polystyrene aggregate and the union of its granules into a single structural array. If the amount of polystyrene is less than the lower limit, the product will not have the required thermal properties.

The upper value of the amount of polystyrene aggregate (0.98 m ³ per 1 m ^{3 of the} mixture) is due to the fact that its excess in the array leads to the formation of areas insufficiently covered with binders, as a result of which stratification of the mixture and a significant decrease in strength indicators and the impossibility of forming and manufacturing products .

The use of polystyrene aggregate in the specified quantitative range allows to obtain a gypsum-polystyrene concrete mixture and products from it in accordance with the objectives of the invention.

Alkali-resistant mineral fiber is necessary for combining polystyrene aggregate granules into a single structural array, as well as to reduce shrinkage deformation and the formation of shrinkage cracks. As an alkali-resistant mineral fiber, the gypsum-polystyrene concrete mixture contains chrysotile asbestos fiber. Chrysotile asbestos fiber has a high adhesive ability to test mineral binder. Being flexible, chrysotile asbestos fiber has the ability to envelop the elements of polystyrene aggregate, reinforcing it. When hardening a mineral binder, the indicated properties of chrysotile asbestos fiber make it possible to obtain a homogeneous gypsum-polystyrene concrete mixture and products from it without shrinkage cracks and deformations. Chrysotile asbestos fiber is elastic and has high tensile strength. This allows you to use it as a material reinforcing gypsum polystyrene concrete products, as a bonding element between polystyrene foam granules with high adhesion to a mineral binder.

Justification of the amount of chrysotile asbestos fiber in the composition of the gypsum-polystyrene mixture.

The lower limit of the amount of alkali-resistant mineral fiber (chrysotile asbestos fiber) (10 kg per 1 m ^{3 of the} mixture) is explained by the fact that when using a smaller amount, the reinforcement of crushed or granular polystyrene particles is not provided throughout the array. This leads to the formation of non-fiber-bonded areas of the gypsum-polystyrene mixture and a decrease in the strength of the resulting products due to delamination of the mixture and shrinkage deformations. The specified disadvantage does not allow to obtain high-quality gypsum-polystyrene concrete products with minimal labor costs.

The upper limit of the amount of chrysotile asbestos fiber (25 kg per 1 m ^{3 of the} mixture) is explained by the fact that exceeding it does not lead to an improvement in the physicomechanical and thermotechnical characteristics of products made of reinforced gypsum-foam polystyrene according to the claimed solution.

Plasticizing additive C-3 is designed to provide better mixing of the mixture and its workability (GOST 24211-91. Additives for concrete. General technical requirements). Superplasticizer C-3 is a mixture of polymer compounds neutralized with sodium hydroxide obtained by condensation of naphthalene sulfonic acids with formaldehyde. Available in dry (brown powder) and liquid form.

Justification of the quantitative limits of plasticizing additives.

The use of plasticizer in a smaller amount than the minimum value (0.03 kg per 1 m ^{3 of the} mixture) leads to the inefficiency of the additive, because it has practically no effect on the properties of the mixture.

Exceeding the upper value of the amount of plasticizer (1.40 kg per 1 m ^{3 of the} mixture) leads to increased cracking due to shrink stresses.

Polyacrylamide is intended to improve the conditions for combining particles of crushed or granular polystyrene coated with a layer of closed mineral binder with chrysotile asbestos fiber into conglomerates. For practical purposes, use a 10% aqueous solution of polyacrylamide, which is necessary for the structuring and consolidation of polystyrene grains. Without the use of polyacrylamide, polystyrene grains are difficult to mix with a binder due to the difference in bulk density. Adding an aqueous solution of polyacrylamide allows you to form a single structure of polystyrene grains and provide good mixing. Together with reinforcement with chrysotile asbestos fiber, polyacrylamide well structures the aggregate mass and does not allow the grains to float in the binder mass with stirring.

The rationale for the quantitative range of structure-forming additives (polyacrylamide).

The lower value of the amount of a 10% aqueous solution of polyacrylamide (0.40 kg per 1 m ^{3 of the} mixture) is due to the need for wetting and enveloping the polystyrene grains with a solution with a minimum film thickness. Going beyond the lower value of the amount of polyacrylamide solution leads to the fact that it is not enough to wet the entire mass of polystyrene grains, and part of it remains untreated and unstructured.

The upper value of the amount of an aqueous solution of polyacrylamide (0.60 kg per 1 m ^{3 of the} mixture) is due to the fact that with a larger amount of polystyrene, a larger amount of a structure-forming additive is required. Exceeding the specified amount leads to difficult mixing conditions without improving the structure of the polystyrene array.

The use of a 10% aqueous solution of polyacrylamide in the indicated quantitative range makes it possible to obtain a gypsum-polystyrene mixture and products from it with specified thermal and physical-mechanical characteristics corresponding to the objectives of the invention.

The stabilizer-plasticizer is intended to impart a mixture of plasticity and workability properties in the manufacture of products from reinforced gypsum polystyrene concrete, as well as stabilizing chemical reactions during curing. Methylcellulose (a water-soluble cellulose ether) or construction methylcellulose, or carboxymethylated starch can be used as a plasticizer stabilizer.

Justification of the quantitative limits of the stabilizer-plasticizer.

Exceeding the lower limit of the amount (0.01 kg per 1 m ^{3 of the} mixture) of water-soluble cellulose ether or carboxymethylated starch, or their binary mixture, leads to the formation of cracks during the hardening of the product and the set of strength due to a rapid change in shrinkage deformations , which leads to a significant decrease in heat engineering, physico-mechanical characteristics of reinforced gypsum-polystyrene concrete.

The use of a stabilizer-plasticizer greater than the upper limit (0.05 kg per 1 m ^{3 of the} mixture) leads to excessive plasticization of the mixture and to a significant inhibition of the set of strength after hardening of the mixture in the product.

The setting time regulator, for example, tartaric acid, or citric acid, or hydroxyethylidene diphosphonic acid, is designed to provide the ability to slow down the rate of chemical reactions of reinforced gypsum-polystyrene concrete mixture and, accordingly, regulate the technological process of manufacturing products.

Justification of the quantitative range of the setting time regulator.

The use of tartaric or citric acid or hydroxyethylidene diphosphonic acid in an amount less than the lower value (0.01 kg per 1 m ^{3 of the} mixture) leads to the fact that the setting speed of gypsum practically does not change.

The use of tartaric or citric or hydroxyethylidene diphosphonic acid in a larger quantity than the upper value (0.2 kg per 1 m ^{3 of the} mixture) leads to an unjustified increase in the setting and hardening of the mixture, causing the effectiveness of gypsum as a mineral binder.

Water is necessary for mixing mineral binder and chemical reactions between the components of the mixture.

Justification of the quantitative range of water

The lower value of the amount of water (20 l per 1 m ^{3 of the} mixture) is due to the need to create conditions not only for chemical reactions, but also to ensure mobility and workability of the mixture. Going beyond the specified value leads to a decrease in the mobility of the mixture, the difficulty of mixing it without a significant improvement in the quality indicators of manufactured products.

The upper value of the indicated amount of water (140 l per 1 m ^{3 of the} mixture) is due to the need to minimize shrinkage deformation, as well as the need to create the required mobility and workability of the mixture when using large quantities of mixture components. Exceeding the specified amount leads to the formation of significant shrinkage deformations, which result in cracks in the products and heterogeneity of the material structure.

The use of mixtures of the specified composition with components in the indicated ranges makes it possible to produce gypsum-polystyrene products with a compressive strength of 0.1-3.0 MPa with a thermal conductivity of 0.071-0.082 W / (mK).

The formulation and quantitative parameters of the components of the reinforced gypsum-polystyrene concrete mixture are determined by the specific requirements for products from it. For example, the amount of Portland cement and its grade (400, 500, 600), the amount of semi-aquatic gypsum or anhydrite and their grade (G-2, G-3, G-4, G-5 ÷ G-25), the amount of crushed polystyrene, the amount tartaric, or citric, or hydroxyethylidene diphosphonic acid, etc., make up the basis of manufactured products by volumetric mass, thermal conductivity, strength, manufacturability, and other indicators.

Implementation options for reinforced gypsum-polystyrene concrete mixtures with various characteristics of the products obtained are presented by the following examples:

Example 1 (per 1 m ³ mixture)

Portland cement brand 400 10 kg Gypsum semi-aquatic G5 60 kg Flask 7 kg Crushed polystyrene 0.90 m ³ Chrysotile Asbestos Fiber 12 kg Plasticizing additive C-3 0.03 kg 10% polyacrylamide solution 0.35 kg Construction pulp 0.015 kg Wine acid 0.015 kg Water 23 l

When mixing in a mortar mixer, a large disintegration of crushed polystyrene particles was noted, as well as separation of polystyrene and mineral binder. A detailed analysis found that many polystyrene grains were not covered by a film from an aqueous solution of polyacrylamide. This led to the impossibility of combining particles into conglomerates and structures in which polystyrene particles would be interconnected via chrysotile asbestos fiber in the presence of a mineral binder.

With manual mixing of this composition in laboratory conditions, these disadvantages were slightly reduced. However, the resulting product is characterized by low homogeneity. In general, the mixture obtained in a normally dry state is characterized by an average cone draft of 7 cm and a setting time of 31 minutes on average. Products obtained from this mixture composition have an average bulk density of 109 kg / m ³ and a compressive strength of 0.09 MPa, a thermal conductivity of 0.052 W / (m K).

Example 2 (per 1 m ³ mixture)

Portland cement brand 500 30 kg Gypsum semi-aquatic G5 160 kg Tripoli 50 kg Polystyrene foam 0.820 m ³ Chrysotile Asbestos Fiber 18 kg Plasticizing additive C-3 0.1 kg 10% polyacrylamide solution 0.40 kg Water soluble methyl cellulose ether 0.015 kg Lemon acid 0.06 kg Water 82 l

When mixing in the mortar mixer of the obtained composition, it was found that the gypsopolysitrol mixture is homogeneous, the polystyrene particles are evenly distributed. The resulting mixture has the following properties: cone draft on average 7 cm, setting time on average 42 minutes. Under normally dry conditions, products obtained from this mixture composition have an average bulk density of 290 kg / m ³ and a compressive strength of 0.35 MPa, a thermal conductivity of 0.071 W / (m K).

Example 3 (per 1 m ³ mixture)

Portland cement brand 500 40 kg A mixture of gypsum semi-aquatic G5 and anhydrite (40: 60%) 150 kg Diatomite 50 kg A mixture of crushed and foamed polystyrene (50: 50%) 0.820 m ³ Chrysotile Asbestos Fiber 18 kg Plasticizing additive C-3 0.1 kg 10% polyacrylamide solution 0.60 kg Carboxymethyl starch 0.04 kg Hydroxyethyl diphosphonic acid 0.15 kg Water 90 l

When mixing the resulting composition, a slight decrease in the mobility of the mixture was noted. The resulting mixture has the following properties: cone draft on average 8 cm, setting time on average 47 minutes. Products obtained from this mixture composition have an average bulk density of 310 kg / m ³ and a compressive strength of 0.65 MPa, a thermal conductivity of 0.08 W / (m K).

Example 4 (per 1 m ³ mixture)

Portland cement brand 400 55 kg A mixture of gypsum semi-aquatic G5 and anhydrite (70: 30%) 220 kg A mixture of tripoli and diatomite (40: 60%) 30 kg A mixture of crushed and foamed polystyrene (85: 15%) 0.8 m ³ Chrysotile Asbestos Fiber 20 kg Plasticizing additive C-3 0.20 kg 10% polyacrylamide solution 0.50 kg Construction pulp 0.015 kg Wine acid 0.07 kg Water 120 l

The resulting mixture is characterized by a cone draft of 7 cm on average, a setting time of 6 minutes on average. Products obtained from this mixture composition have an average bulk density of 355 kg / m ³ and a compressive strength of 0.9 MPa, a thermal conductivity of 0.080 W / (m K).

Example 5 (per 1 m ³ mixture)

Portland cement brand 500 40 kg A mixture of gypsum semi-aquatic G5 and anhydrite (50: 50%) 150 kg A mixture of tripoli, diatomite and flask (25: 25: 50%) 50 kg Crushed polystyrene 0.820 m ³ Chrysotile Asbestos Fiber 18 kg Plasticizing additive C-3 0.1 kg 10% polyacrylamide solution 0.55 kg Carboxymethyl starch 0.04 kg Hydroxyethyl diphosphonic acid 0.15 kg Water 90 l

The resulting mixture has the following properties: cone draft on average 7 cm, setting time on average 41 minutes. Products obtained from this mixture composition have an average bulk density of 303 kg / m ³ and a compressive strength of 0.6 MPa, a thermal conductivity of 0.074 W / (m K).

Claims (1)

Reinforced gypsum-polystyrene concrete mixture, including Portland cement, polystyrene aggregate, alkali-resistant mineral fiber, polyacrylamide, plasticizing additive C-3, hardening regulator, water, characterized in that it additionally contains semi-aquatic gypsum or anhydrite, or any mixture in any proportion, tripoli or flask, or diatomite, or a mixture thereof in any proportion, water-soluble methyl cellulose ether or construction cellulose, or carboxymethyl starch, and crushed polystyrene as a polystyrene filler l or a mixture in any proportion with foamed polystyrene, as the alkali-resistant mineral fiber - chrysotile asbestos fiber, as a hardening regulator - tartaric or citric acid, or oksietilidendifosfonovuyu acid components have the following relation to 1 m ³ of mix:
Portland cement, kg 10.0-50.0 gypsum or anhydrite or their mixture in any proportion, kg 60.0-250.0 tripoli, or flask, or diatomaceous earth, or their mixture in any proportions, kg 7-75 crushed polystyrene or mixture in any proportion with granulated polystyrene foam, m ³ 0.70-0.98 chrysotile asbestos fiber, kg 10.0-25.0 plasticizing additive C-3, kg 0.03-1.40 10% solution of polyacrylamide, kg 0.40-0.60 water soluble methyl cellulose ether, or cellulose building or carboxymethyl starch, kg 0.01-0.05 wine, or lemon, or hydroxyethylidene diphosphonic acid, kg 0.01-0.20 water, l 20.0-140.0