EA013241B1 - Method and raw mix for production of a non-steam-cured cellular concrete and method of erection structures therefrom - Google Patents

Abstract

The invention relates to the constructional materials, in particular to a non-steam-cured cellular concrete, and to a method of production thereof in the construction conditions and to a method of construction therefrom. The method for production of the non-steam-cured cellular concrete comprises, in particular preparation of a solution for pore formation on the basis of the concrete, water, plasticizing agent, hardener formulation quantities and, if necessary, weighting agent, preparation under the special process on the basis of the formulation quantities of water and foaming agent of a foam for pore formation, its two-stage injection into the solution for pore formation, and injection of a reinforcement additive into the solution for pore formation. The non-steam-cured cellular concrete is prepared on the basis of a raw mix, comprising the concrete, plasticizing agent C-3, hardener, foaming agent, reinforcement additive and water for tempering and for foam preparation, at the following components content per 1.0 mof cellular-concrete mixture: 135 - 460 kg of cement, 1.0 – 3.8 kg of plasticizing agent C-3, 1.2 – 4.7 kg of hardener, 2.6 – 4.7 kg of reinforcement additive, 1.4 – 1.9 kg of foaming agent, 100 - 200 kg of water and, if necessary up to 690 kg of weighting agent. Alkali-resistant synthesized fiber, preferably low-grade and nonutilizable textile waste, and more preferably fur fabric waste products after shearing with the fiber length of no more than 1.0 cm are preferably used as a reinforcement additive. The method of the non-steam-cured cellular concrete construction comprises preparation of the non-steam-cured cellular concrete with the fixed density in the place of construction and concrete feeding through the concrete-delivery pipeline under pressure to a place of deposit.

Description

The invention relates to construction materials, in particular to concrete, obtained using a blowing agent, namely, non-autoclaved cellular concrete.

The invention also relates to a method for preparing, under construction conditions, non-autoclaved cellular concrete on cement binder using a foaming agent, a hardening accelerator and other functional additives.

The invention finally relates to a method for erecting structures from non-autoclaved cellular concrete.

Concrete is one of the oldest building materials, known since ΙΙΙ-ΐν century BC. However, the use of concrete and reinforced concrete for mass construction began only in the second half of the XIX century after the production and organization of industrial production of portland cement, which became the main binder for concrete and reinforced concrete structures and structures. The appearance of cellular concrete (a group of light concrete, whose structure is characterized by the presence of a significant amount (up to 85% of concrete) artificially created closed pores (cells) 0.5-2 mm in size) is associated with the development of organic chemistry. The principle of their production is based on the introduction of frothers, which are mainly products of organic origin, into the cement dough. At the same time, depending on the technology of preparation, in particular, the conditions of hardening, cellular concretes are divided into autoclaved and non-autoclaved hardening concrete.

Non-autoclaved cellular concrete belongs to a large group of effective concrete, such as gas foam concrete, polystyrene foam concrete, polystyrene concrete, porous cement paste, concrete with foam foam granules, etc., which are characterized by high heat, sound and vapor insulation properties, low average density, sufficient fire resistance. Such concretes are successfully used for the manufacture of a large range of building products: large and small wall blocks, thermal insulation products, floor slabs, lintels, etc. An important feature of cellular concrete is the ability to drastically improve the thermal insulation properties of exterior walling and internal walls, as well as reducing the mass of buildings. Non-autoclaved hardened concrete concretes are used today in monolithic housing construction, but not widely enough.

Non-autoclaved cellular concrete was known before autoclaved, but it did not receive such wide distribution, especially in monolithic housing construction, for several reasons.

It is traditionally considered that non-autoclaved concrete is still inferior to autoclave concrete in terms of strength and density, which, theoretically, limits the possible range of its application. However, according to a number of publications, experts in the field of non-autoclaved gas and foam concrete obtained heat-insulating concrete of average density from 100 to Ό500 and developed technologies for producing such concrete and products based on them. It can be assumed that, taking into account the further intensive development of the chemical industry, which offers all new functional additives — frothers, hardening accelerators, plasticizers, reinforcing additives, etc., non-autoclaved cellular concrete can be quite competitive with autoclaved concrete. In addition, non-autoclaved concrete technology is much simpler, less energy-intensive and cheaper.

However, with the apparent simplicity of the technology, the formation of the macrostructure of cellular concrete is difficult to control and regulate. This is due to the need to control a large number of technological parameters: the quality and quantity of raw materials, water-solid ratio, temperature and pH of the medium, changing in the process of manufacturing and hardening products. Therefore, the actual conditions for the formation of foam concrete often deviate from the optimum, which leads to the appearance of defects in the structure. This applies even more to the preparation of non-autoclaved cellular concrete in construction conditions, which are characterized, in particular, by the instability and the impossibility of controlling the basic environmental parameters (temperature, humidity, etc.).

Cellular concretes are sensitive to the quality of the feedstock, the composition of the working composition, the ambient temperature, the quality of the gas and foaming agent, the alkalinity of the medium and other factors. When developing a composite material (i.e., when selecting a raw mix for the qualitative and quantitative composition of the components), it is necessary to bear in mind that this is a complex system consisting of subsystems or elements (components), each of which performs its functions. The elements used in the system are not isolated from each other and must be selected so as to ensure the efficiency and durability of the newly emerging system. Each individual element is not characterized by the properties that the new system will have - ready cellular concrete. Only in the aggregate of all the necessary elements that are subject to changes as a result of physicochemical and mechanical processes, a system is created with predetermined properties.

The issues of obtaining a universal composition of non-autoclaved cellular concrete, the ratio of volume, size and shape of air and capillary pores, the volume of crystalline and gel-like parts of tumors, the "aging" of hydration products, the limiting boundaries of the packing of the solid phase in the interstitial volume with varying structure and reducing shrink deformations.

Production of a concrete mixture in construction conditions requires workers to accurately and after

- 1 013241 satisfactory performance of the operation at all stages of production.

The above and other issues and problems associated with the production and use of non-autoclaved cellular concrete, despite the obvious effectiveness of its use in construction, including monolithic, significantly hamper the development of this area of building materials.

A number of theoretical works are known related to the study of the properties of non-autoclaved cellular concrete, with the development of their compositions, etc. [1, 2, 3]. These works are mainly research and / or theoretical in nature and are aimed at studying the processes occurring in the raw mixes in the preparation of non-autoclaved cellular concrete, as well as the possibilities of influence on these processes.

There are also various patent documents that disclose compositions and methods for the preparation of non-autoclaved cellular concrete. Thus, a mixture is known for the manufacture of cellular concrete (foam concrete), including Portland cement, aggregate, filler, foaming agent, modifying additive and water, which contains quartz sand as a filler, ground fillet with a specific surface of 3700 cm ² / g as a filler. foaming agent - alkyl sulfates of primary fatty alcohols, as a modifying additive - an additive based on condensed phenols with a certain content of the listed components [4]. Among the technical results achieved, the possibility of increasing the strength characteristics of foam concrete made from a mixture without increasing the average density of products, as well as cost reduction, is indicated. However, the component composition of this mixture is designed for a certain narrow density range of products from it (the minimum is 300 kg / m ³ ) and does not provide the required high strength characteristics when leaving this range, especially in the direction of reducing the density. In addition, the composition of the mixture includes raw materials that are rare and specific only for individual regions, which significantly limits the possibilities for its use.

Also known are the raw mix and the method of obtaining on its basis a foam concrete mix, and the foam concrete mix is obtained by mixing with water a mixture containing cement, a filler — limestone flour, a protein frother and a stabilizer — metal sulfate, while the components are taken in a dry state, with a water-hard ratio of 0 , 49-0.62, in the following ratio of components, wt.%: Cement - 69.6-69.85, limestone flour - 29.77-29.98, protein frother - 0.192-0.49, metal sulfate - 0.038 -0.1 [5]. Among the technical results are indicated the simplification of the process of obtaining the foam concrete mixture, reducing its energy intensity and labor intensity while ensuring the required physicomechanical characteristics, improving the quality of foam concrete products, the production of which will be possible not only in the factory, but also directly at the construction site, as well as reducing the density cellular material. However, the proposed method, as in the case described above, provides cellular concrete with a density of 400-800 kg / m ³ . The possibility of achieving high values of strength at a density outside this range (especially downwards) is not mentioned in the patent.

It has already been mentioned above that one of the possible ways to solve the problem of insufficient strength of non-autoclave cellular concrete can be a wider use of various reinforcing additives. In particular, it significantly improves the construction properties of conventional cellular concrete, its reinforcement with microfibers.

In this regard, the raw material mixture for the production of non-autoclaved foam concrete and its production method are known, where the raw material mixture contains a foaming agent, a polymer modifier from the group of active colloids and an activated solution obtained by mixing cement, technological additive and water, followed by activation of the solution, inorganic technology is used as a technological additive. additive capable of reacting with the Ca (OH) ₂ and / or fibrous additive in a solution of said activated modifier is introduced, and then the foaming agent or less prepared foam with the following content of components, wt.%: cement - 50-70, polymer modifier - 0.5-1.5, the specified inorganic additive - 0-20, fiber additive - 0-8, frother - 0.44, water - the rest [6]. Sodium polyacrylate, or styrene acrylate dispersion, or polyvinyl acetate dispersion, or carboxymethylcellulose is introduced as the modifier; silica pozzolanes are added with sodium silicates with a modulus of 1.5 to 2.5 as indicated inorganic additives with sodium silicates ranging from 5.0 to 15.0 wt.% From the mass of pozzolan or ground granulated blast furnace slag containing up to 50 wt.% Two-water gypsum, or calcium carbonate, containing up to 30% hydrate of tricalcium aluminate, and as a fibrous additive in Polyacrylic fibers with a fiber length of 4 to 24 mm. As a technical result, the aforementioned patent indicates an improvement in the quality of foam concrete while simplifying its production technology. However, analysis of the patent description showed that a significant increase in strength and other characteristics of the finished cellular concrete was confirmed only at density values in the range of 396-430 kg / m ³ . In addition, the raw mix contains a fairly large number of different components. At the same time, by the combination of essential features, this method can be adopted as a prototype for the proposed method of preparing non-autoclaved cellular concrete.

A review of the state of the art in the production of non-autoclaved cellular concrete showed that there is still a rather acute problem of developing raw materials for

- 2 013241 preparation of non-autoclaved cellular concrete, as well as appropriate methods of preparation of concrete.

Thus, the object of the invention is to develop a raw material mixture of a unified composition, as well as a method for preparing non-autoclaved cellular concrete and a method of erecting structures from non-autoclaved cellular concrete on its basis that would provide products (structures) with high strength characteristics for a wide density range. The method and raw mix should provide the possibility of preparing cellular concrete in construction conditions for monolithic construction, including without the use of formwork due to the ability of the prepared concrete to retain its shape, as well as by reducing the curing time. The method and the raw mix, in addition, should provide increased service life of concrete structures, as well as reducing the cost and time of work on the preparation of non-autoclaved cellular concrete and structures from it.

The problem is solved by the claimed method of preparation of non-autoclaved aerated concrete based on the raw mix containing prescription quantities of water, cement, at least one functional additive selected from the groups including plasticizer, hardening accelerator and weighting agent, as well as a frother and, if necessary, reinforcing additive comprising preparing a solution for porisation by dissolving the components of the raw mix in water with stirring and, if necessary, heating and subsequent porisation iju solution and introduction of reinforcing concrete additives to obtain a desired characteristics. The problem is solved due to the fact that prior to porisation of the solution, foam is prepared for porisation by dissolving the foaming agent in water with mixing by supplying air under a pressure of 0.5-2.0 atm and subsequent calibration of the foam by passing through the dividers and the lattice until bubbles of the same size are reached. to obtain a foam with a pore yield ratio of at least 15 and a pore former use ratio of at least 0.8, the solution for porisation is prepared by dissolving functional additives in water, followed by When cement is constantly added with mixing and, if necessary, weighting agent, the porisation is carried out in a tank of a given volume in two stages, while in the first stage about 1/3 of the volume of the prepared foam is added to the porization solution, followed by stirring additives to obtain a homogeneous structure of the concrete mixture, and in the second stage, the rest of the prepared foam is introduced into the concrete mixture, followed by mixing to obtain cellular concrete with specified characteristics ISTIC, wherein stirring is carried grating lobes.

It has already been mentioned above that when developing the technology for preparing non-autoclaved cellular concrete, the choice of operations, modes and formulations of raw mixes is not carried out by simple calculations or actions using a standard scheme, but through numerous studies, for example, compatibility of properties of individual components by modeling processes, experimental checks, etc. . Thus, the authors tested their proposed method and composition of the raw material mixture during the performance of experimental work, as well as during the construction of an experimental monolithic 16-storey building in various seasonal conditions characteristic of a temperate climate of middle latitudes. At the same time, depending on the specific environmental conditions in the preparation of concrete under construction conditions, relatively high results were obtained in terms of strength, thermal conductivity, weight reduction of the structure, etc.

In preferred embodiments of the method according to the invention, alkali-resistant synthetic fiber is introduced as a reinforcing agent, preferably low-grade and non-utilizable textile waste, more preferably synthetic fur production waste after cutting with a fiber length of not more than 1.0 cm.

Introduction, if necessary, in the formulation of the raw mix weighting agent allows you to vary the density of the prepared concrete in a fairly wide range. In this case, dolomite flour or sand is preferably introduced as a weighting agent.

Including, depending on the quantity and characteristics of the weighting agent introduced, cellular concrete with density from 150 to 1200 kg / m ^{3 is} obtained.

As already noted above, the characteristics of concrete depend not only on the method of its preparation, but, above all, on the composition of the raw mix. The choice of the appropriate composition of the raw mix, providing the desired characteristics of the finished concrete and products made from it (erected structures), is the result of various studies, experiments and calculations.

Thus, the task is also solved by the claimed raw material mixture for the preparation of non-autoclaved cellular concrete of various densities by the method described above, containing cement, plasticizer C-3, hardening accelerator, frother, reinforcing agent and water for mixing and for preparing foam, with the following content of components 1.0 m ³ cellular mixture, in kg:

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cement 135 -460 plasticizer C-3 1.0-3.8 curing accelerator 1.2-4.7 reinforcing additive 2.6 - 4.7 frother 1.4-1.9 water 100-200.

Depending on the target (specified) characteristics of the concrete, the raw mix may additionally contain up to 690 kg of weighting agent per 1.0 m ^{3 of} concrete mixture.

The modern level of development of chemistry provides accessibility for specialists in this field of technology of a wide range of various functional additives - plasticizers, hardening accelerators, foam formers, etc., used in the inventive raw mix, on the basis of which a specialist can choose a specific additive in accordance with specified characteristics .

So, the claimed raw material mixture as a hardening accelerator may contain calcium chloride or polymetallic aqueous concentrate (PVC), as a frother - PB-2000, as well as any similar mentioned additive.

In this case, it is still preferable to use alkali-resistant synthetic fiber as a reinforcing agent, preferably low-grade and non-utilizable textile waste, more preferably synthetic fur production waste after cutting with a fiber length of not more than 1.0 cm. Using this kind of reinforcing additive significantly reduces the cost of the raw mix as a whole and, besides, solves the problem of utilization of previously unutilized waste. Moreover, the use of such a reinforcing additive unexpectedly gave high results to increase the strength of concrete and products (structures) from it.

If necessary, the claimed mixture may contain as a weighting agent dolomite flour or sand.

The task is also solved by the claimed method of erection of structures from non-autoclaved cellular concrete, including the manufacture of non-autoclaved cellular concrete with predetermined density values by the method described above from the raw mixture described above at the site of construction and supply of concrete to the place of installation.

The inventive and detailed above methods for preparing non-autoclaved cellular concrete and erecting structures made of prepared concrete demonstrate the most effective results provided the optimum pace of technological operations, rational organization of the workplace, strict adherence to the division of labor and the use of appropriate modern tools and equipment.

In more detail the proposed methods, as well as the claimed raw mix will be considered in the framework of the following examples of implementation.

Examples

For the preparation of concrete from the raw mix according to the invention, the following devices and equipment were used in all the examples below under construction conditions in the following examples: mixing plant (PB-1-MON), modernized for preparing concrete mixture, equipped with lattice blades, rotation speed up to 40-45 rpm; foam generator (PG-1), equipped with dividers and grill, located after the mixing chamber; compressor (СМ415М), with a capacity of 0.63 m ³ / min; screw pump (which provides pumping of the mixture without changing the physical and mechanical properties and destruction of the pores); plaster station (school-4). At the same time, a specialist in the field of technology can choose any other available similar equipment to perform each of the technological operations.

In all the examples below, the work was performed in the following sequence.

Before starting work, connect the water supply hose to the water supply source, connect the water supply pipe to the PB-1-MON installation and to the plaster station pump, connect the hoses from the C415M compressor to the PB-1-MON installation and to the PG-1 foam generator.

Manually unpack, fluff, weigh and pack synthetic fiber (low-grade and non-recyclable textile waste, such as waste production of synthetic fur after shearing with a fiber length of not more than 1.0 cm). Fill tank plaster station SSh-4 with water. Include plaster station and, if necessary, heats the water to the required temperature (depending on the ambient temperature), for example up to 40 ° C. Water, if necessary, heated from the SSH-4 tank with buckets is poured into the PB-1-MON facility. Fill measuring tanks

- 4 013241 additives (plasticizer C-3 and the hardening accelerator PVK-0) and pour the additives into the installation. The PB-1-MON installation is turned on and water is mixed with additives for about 30 seconds. Water from the SSh-4 tank is poured into the PG-1 foam generator. The measuring container is filled with PB-2000 frother and the frother is poured into PG-1 foam generator. The C415M compressor is turned on, air is fed under the pressure of 0.5-2 atm to the PG-1 foam generator, and foam is prepared for about 5 minutes. The measured capacity is filled with the prepared foam, weighed, and, according to the relevant table, the coefficient of pore yield K, equal to the ratio of the volume of foam to the mass of the blowing agent, l / kg, is determined. The coefficient K should be at least 15 and the utilization factor of the blowing agent α should not be below 0.8. If necessary, adjust the composition of the foam.

Cement and, if necessary, dolomite flour is weighed and poured into the installation PB-1-MON. When loading cement (dolomite flour), the installation must be turned on (the blades must rotate). Mixing time with cement for about 2 minutes, adding dolomite flour for about 2 minutes. After this time, the engine installation PB-1-MON shut down. Install the foam supply hose into the installation loading door. Compressed air is supplied to the PG-1 foamer, and the foam enters the PB-1-MON facility through a hose. When loading 1/3 of the foam volume, the supply of compressed air to the foam generator PG-1 is stopped. Pull out the hose from the loading door of the PB-1-MON installation, turn on the engine and mix the concrete mixture for about 2 minutes. After that, when the engine of the PB-1-MON installation is running, synthetic fiber is portion-wise loaded into its charging port. The mixing time of the aerated concrete mixture with synthetic fiber is about 3 minutes.

After this time, turn off the engine installation PB-1-MON. The foam supply hose is installed in the installation loading door, compressed air is supplied to the foam generator PG-1, and foam is supplied through the hose to the PB-1-MON installation. When loading 2/3 of the foam volume, the supply of compressed air to the PG-1 foam generator is stopped and the hose is taken from the charging port of the PB-1-MON facility.

After loading the foam, close the loading door with a lid, turn on the engine and mix the concrete mixture for about 5 minutes.

After this time, turn off the engine, open the boot lid, fill the measuring tank with cellular concrete mixture, weigh it and determine the density of the prepared concrete concrete according to the appropriate table. If necessary, adjust the composition of the prepared aerated concrete mixture by adding the appropriate components in the installation PB1-MON, and re-determine the properties of the mixture. Mixing the aerated concrete mixture after additional loading of the components is about 2 minutes.

After checking the properties of the mixture, in case of a positive result of the test, the boot lid is closed, the compressor is turned on and compressed air is supplied to the PB-1-MON facility. Aerated concrete mixture in portions through the concrete line enters the bunker of the plastering station. Turn on the pump and pump the mixture through the pipework to the place of installation. Laying produced in pre-installed formwork or without it. The temperature of the mixture at the time of laying is about 25 ° C.

To create normal conditions of hardening, the surface of the fresh mixture is covered with a film and moistened periodically for 7 days.

The properties of the foam are periodically checked under laboratory conditions in order to determine the density of the aerated concrete mixture, its temperature, etc.

Below in tabular form are examples of the production of concrete with a density of 150 to 1200 kg / m ³ from the raw mixes according to the invention by the method according to the invention, as well as the results of testing samples of concrete.

Examples 1-8.

According to the technology described above, cellular concrete mixtures of various densities were prepared from raw mixtures, the composition of which is given in table. one.

In the examples used components (materials) with the following characteristics.

Cement - Portland cement mark 500 D0 (PC500 D0); mineralogical composition: 3CaO-31O ₂ not less than 50, 3CaO-L1 ₂ O ₃ not more than 6; setting time: the beginning of setting - no later than 2 hours, the end of setting no later than 4 hours; grinding fineness (specific surface) - 2500-3000 cm ² / g; activity at the age of 28 days - not less than 5.9 / 49.2 MPa.

Lime (dolomitic) flour - mineralogical composition: CaO + MdO not less than 85.

Plasticizer - plasticizer C-3.

Curing Accelerator - PVC Curing Accelerator.

Frother - PB-2000 frother.

Synthetic fiber - waste production of synthetic fur after shearing with a fiber length of not more than 1.0 cm.

The number of components of the raw mix is given based on 100 m ^{3 of a} concrete mixture (taking into account losses during transportation of the mixture of 1.5%).

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No. p / p Component Name Unit The number of components in the brand mix Etc. one Ш50 Etc. 2 Ц250 Pr.Z Ezoo Etc. four Ώ400 Etc. five Ώ500 Etc. 6 Ω700 Etc. 7 ϋ900 Etc. eight Ώ1200 one Cement t 13.6 22.3 27.4 36.5 45.7 45.7 45.7 45.7 Flour 2 calcareous (dolomitic) Plasticizing t 21.3 40.6 68,6 3 t 0.11 0.17 0.24 0.28 0.37 0.37 0.37 0.37 torus Accelerator four t 0.13 0.22 0.27 0.37 0.46 0.46 0.46 0.46 curing Synthetic five some fiber Foaming t 0.27 0.51 0.27 0.37 0.46 0.46 0.46 0.46 6 t 0.18 0.18 0.15 0.15 0.15 0.15 0.15 0.15 vatel Water 7 gates t 4.00 6.09 8.12 10.2 13.2 13.2 13.2 13.2 Water for eight cooking t 6.09 6.09 4.92 4.92 4.92 4.92 4.92 4.92 foam

Table 1

Characteristics of aerated non-autoclaved concrete hardening obtained in examples 1-8 are given in table. 2

___ ________ Table 2

No. p / p Specifications Sample number one 2 3 four five 6 7 eight one Specific density, kg / m ³ 150 250 300 400 500 700 900 1200 2 Density, normal conditions, kg / m ³ 170 270 320 425 543 745 942 1235 3 Density, after drying at 100 ° С, kg / m ³ 150 240 300 400 520 725 910 1210 four Humidity,% 12 14 nineteen 25 24 20 22 24 five Heat conductivity coefficient, W / mrad 0.05 0.06 0.075 0.09 0.10 0.17 0.23 0.37 6 The volume of open capillary pores,% 28.1 28.3 23.8 24.0 30.7 31.1 31.5 32.2 7 Tensile strength at 10% linear deformation in normal conditions, MPa 0.20 0.23 1.19 1.24 1.90 4.60 9.90 16.50 eight Strength at 10% linear deformation after drying at 100 ° С, MPa 0.12 0.20 1.15 1.53 2.05 5.10 10.10 17,10 9 Flexural strength, MPa 0.24 0.25 0.71 0.70 0,69 0.67 0.64 0.60 ten Shrinkage during molding,% 0 0 0 1.0 0 0.9 0.8 0.8

Literature.

1. Chistov Yu.D. To the question of some key problems of non-autoclaved cellular concrete. / / Building materials, equipment, technology of the XXI century. 2003, № 8, p. 24-25.

2. Kolomatsky A.S. Cement hardening processes in foam concrete. // Bulletin of BSTU. V.G. Shukhov.

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Scientific and theoretical journal. Thematic issue "Foam concrete", 2003, No. 4, p. 138-145.

3. L. Shakhova. Some aspects of the research on the structure formation of non-autoclaved hardening cellular concrete. Construction materials. 2003, No. 2 [annex], p. 4-7.

4. KI patent number 2279415 C2, publ. 07/10/2006.

5. Patent of CI No. 2280628 C1, publ. 07/27/2006.

6. Patent of CI No. 2306221 C2, publ. September 20, 2007.

7. Patent EA No. 006031 B1, publ. 08.25.2005

Claims (11)

CLAIM 1. A method of preparing non-autoclaved aerated concrete based on a raw mix containing prescription amounts of water, cement, at least one functional additive selected from the groups including plasticizer, hardening accelerator and weighting agent, as well as a foaming agent and, if necessary, reinforcing additive, including the preparation of a solution for porization by dissolving in water the components of the raw material mixture with stirring and, if necessary, heating, and subsequent porization of the solution and the introduction of a reinforcing additive for on the production of concrete with desired characteristics, characterized in that prior to porous solution, foam is prepared for porosity by dissolving a foaming agent in water with stirring by supplying air at a pressure of 0.52.0 atm and then calibrating the foam by passing through dividers and a grate until the bubbles are the same size to obtain a foam with a pore yield coefficient of at least 15 and a pore former utilization factor of at least 0.8, a solution for porosity is prepared by dissolving a functional flax additives, followed by the addition of cement and, if necessary, a weighting agent, the porization is carried out in a container of a given volume in two stages, while in the first stage about 1/3 of the volume of the prepared foam is added to the solution for porosity, followed by mixing and stirring reinforcing additives to obtain a concrete mixture of a homogeneous structure, and in the second stage, the rest of the prepared foam is introduced into the concrete mixture, followed by mixing to obtain a cellular concrete on with the given characteristics, and mixing is carried out by lattice blades. 2. The method according to claim 1, characterized in that an alkali-resistant synthetic fiber, preferably low-grade and non-recyclable textile waste, more preferably synthetic fur production waste after shearing with a fiber length of not more than 1.0 cm, is introduced as a reinforcing additive. 3. The method according to any one of claims 1 or 2, characterized in that dolomite flour or sand is introduced as a weighting agent. 4. The method according to any one of claims 1 to 3, characterized in that aerated concrete with a density of 150 to 1200 kg / m ^{3 is} obtained. 5. The raw material mixture for the preparation of non-autoclaved aerated concrete of various densities by the method according to any one of claims 1 to 4, containing cement, plasticizer C-3, a hardening accelerator, a foaming agent, a reinforcing additive and water for mixing and for preparing foam with the following content of components per 1 , 0 m ³ aerated concrete mixture, kg: cement 135 -460 plasticizer C-3 1.0-3.8 hardening accelerator 1.2-4.7 reinforcing additive 2.6 - 4.7 foaming agent 1.4-1.9 water 100-200. 6. The mixture according to claim 5, characterized in that it further comprises up to 690 kg of weighting agent per 1.0 m ^{3 of} aerated concrete mixture. 7. A mixture according to any one of claims 5 or 6, characterized in that it contains calcium chloride or a polymetallic aqueous concentrate (PVC) as a hardening accelerator. 8. The mixture according to any one of paragraphs.5-7, characterized in that as a foaming agent contains PB2000. 9. A mixture according to any one of claims 6 to 8, characterized in that it contains an alkali-resistant synthetic fiber as reinforcing additive, preferably low-grade and non-recyclable textile waste, more preferably synthetic fur production waste after shearing with a fiber length of not more than 1.0 cm. 10. A mixture according to any one of claims 6 to 9, characterized in that it contains dolomito as a weighting agent - 7 013241 voy flour or sand. 11. A method of erecting structures from non-autoclaved aerated concrete, comprising preparing non-autoclaved aerated concrete with predetermined density values by the method according to any one of claims 1 to 4 from a raw material mixture according to any one of claims 5 to 10 at the construction site and supplying concrete through a concrete duct under pressure to the place of laying.