Adhesive used for gas silicate blocks. How to choose glue for gas silicate blocks? The composition of the adhesive for gas silicate blocks

Comments:

Adhesive is used for gas silicate blocks when laying walls erected using gas silicate and foam concrete blocks, as well as brick slabs.

Glue for gas silicate blocks has a number of advantages: plastic, withstands low temperatures, repels moisture.

Properties and technology of use

In finished form, the masonry adhesive looks like a viscous monotonous mass. Its basis is cement. Various additives give it the properties of plasticity, retain moisture and push out small air bubbles from the mixture. Thanks to the components included in the composition, the glue protects.

Universal adhesive for gas silicate blocks contains a mandatory ingredient that prevents the blocks from absorbing moisture from the adhesive mixture. At the same time, the additive retains moisture in the adhesive solution and allows you to securely fasten the blocks.

For thorough mixing, you must use a construction mixer.

By improving the composition, additives increase the strength, frost resistance, and water resistance of the solution.

Manufacturers produce glue for gas silicate blocks:

• usual;
• frost-resistant.

To work at low temperatures (-5-15 ° C), a ready-made composition with additives resistant to low temperatures is purchased or a special component is added to the usual one.

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To dilute the adhesive mixture, 2-2.4 liters of any water will be required per 10 kg of dry weight.

Pour water into the container, then pour out the measured amount. Mix using a construction mixer (drill with a special nozzle).

The solution is infused for 10-15 minutes, mixed again. The prepared composition must be used within 2 hours.

A prerequisite for a high-quality adhesive mixture is the addition of dry ingredients to water, and not vice versa.

Care must be taken when mixing. The dry mix contains cement. When preparing and styling, it is advisable to use a mask and gloves to protect the skin and lungs.

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Laying technology

The base must be cleaned of dust, paint, stains of grease, bitumen.

To apply the adhesive, you can use a notched trowel or bucket trowel.

The first row of blocks is laid out on the foundation, which is fastened with a traditional cement mortar. This must be done in order to level the initial row, the thickness of the seam between the bricks can vary and reach several cm.

The second and subsequent rows are laid on the glue for gas silicate. If the ambient temperature is more than 30°C, it is necessary to moisten the bricks before applying the mortar.

The adhesive mass is applied and distributed on the prepared surface with a notched trowel. A special bucket trowel will help to apply the solution vertically.

Within 15 minutes, the masonry is leveled with a rubber mallet. Remove excess solution.

The glue dries within 24 hours. The highest degree of strength of the lined wall occurs after 3 days.

Not only a bricklayer, but a non-professional with skillful hands can build walls and partitions. To do this, it is enough to carefully observe the technology of laying gas silicate blocks.

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Pros and cons of glue

The adhesive used for gas silicate blocks has distinct advantages compared to conventional cement-sand mortar.

Easily diluted, consists of only two components for mixing - water and dry mix. Does not need large containers for cooking, such as a concrete mixer. Less time and labor is required to prepare the adhesive.

There is no need to store a large number of components - sand and cement. Economical - the thickness of the seam according to the norm is 3 mm. Due to the additives, it is plastic, non-combustible material, does not create conditions for the appearance of mold.

It is used when laying up to -5°С, frost-resistant mixtures - up to -15°С. The possibility of leveling the masonry within 10-15 minutes. A thin seam gives excellent thermal insulation. Dry building mix is ​​stored for a long time.

Can be used for bonding various surfaces. Easy to apply and remove excess. When breeding, it allows you to avoid debris and dirt, which is convenient for the construction of partitions, redevelopment of walls in an apartment.

Glue for gas silicate has one significant disadvantage. It is not used if the sizes of the bricks differ and it is necessary to lay out seams of various thicknesses.

Additionally, block adhesive can be used for leveling porous surfaces, for waterproofing walls, when laying tiles on a cement plaster or brick base.

Glue is purchased from the following calculation: for a layer thickness of 2 mm, 3 kg of dry mixture is needed for every 1 m².

The adhesive consumption depends on:

• installer experience;
• laying quality;
• the quality of the blocks themselves (how smooth the surface they form).

1. Adhesive composition for laying blocks ofcellular aerated concreteK21/1

2. Adhesive composition for laying blocks ofcellular aerated concretewinter K21/2(with antifreeze additive)

DESCRIPTION

The adhesive composition for laying blocks of cellular aerated concrete is a dry building mixture consisting of cement, natural quartz sand, mineral fillers and polymer additives. When mixed with water, it forms a plastic mortar mixture. Thanks to special water-retaining additives, the adhesive mixture provides excellent adhesion of the blocks even when applied in a very thin layer, which significantly reduces consumption. After hardening, it forms a durable waterproof and frost-resistant solution.

APPLICATION AREA

The adhesive mixture is intended for laying blocks of cellular aerated concrete with strictly maintained geometric dimensions and shape (dimensional tolerance ± 1–2 mm). The properties of the material make it possible to lay blocks with a small seam thickness (2-3 mm), to obtain a wall that is homogeneous in terms of thermal insulation and to prevent its freezing through the seams. The adhesive composition is also suitable for laying expanded clay concrete blocks and other piece wall materials, eliminating defects (irregularities, potholes, chips) in them. Used both inside and outside buildings.

BENEFITS

- suitable for indoor and outdoor use;

- reduces heat loss through the building envelope;

– high compressive strength;

- convenience and ease of use;

– waterproof;

- frost-resistant;

– has a high adhesion strength to the cellular concrete base;

- cost-effectiveness, the ability to perform masonry with a minimum thickness of the seam;

- environmentally friendly.

SURFACE PREPARATION

All surfaces on which the adhesive composition is applied must have a temperature of +5 to +25°C. The base must be even, strong, clean, free of dirt, dust, ice, oil stains, paint, particles that can impair the adhesion of the adhesive to the base. Loose and fragile areas of the surface must be removed. The surface of the blocks before applying the adhesive composition should be moistened with a small amount of water.

PREPARATION OF THE ADHESIVE COMPOSITION

Pour the dry mixture gradually into a container with water (water temperature from +10 to +25 ° C) at the rate of 0.22–0.26 l of water per 1 kg of dry mixture (5.5–6.5 l of water per 25 kg bag ). Stir the mixture with a low-speed (up to 300 rpm) drill-mixer or manually until a homogeneous, lump-free consistency. Set aside for 8-10 minutes to ripen the mixture, then mix thoroughly again. Properly prepared adhesive composition should have the consistency of thick sour cream, while the profile formed when the adhesive composition is applied to the contact surface with a notched trowel should not blur. In the process of conducting work, it is necessary to mix the finished solution from time to time to maintain the uniformity of its consistency. Adding water to the prepared adhesive to restore its consistency is not allowed. The solution retains its properties for 90–120 minutes (depending on air temperature). In winter, the use of the solution is limited to 30 minutes.

PERFORMANCE OF WORK

The masonry process is to be carried out in compliance with the technology of masonry element manufacturers and building codes. The finished adhesive composition is applied with a special tool (a box with a comb, a toothed bucket), corresponding to the width of the blocks. It is allowed to apply the adhesive composition on the contact surface with a steel spatula or trowel, leveling with a notched trowel. To apply the adhesive, it is recommended to use a notched trowel with a tooth size of 5 mm. The blocks are placed on an evenly distributed mortar mixture and their position is corrected with a rubber mallet within 5 minutes after laying. Excess mortar squeezed out of the seams is not overwritten, but removed with a trowel. The recommended thickness of the adhesive solution between the blocks after pressing should be 2–3 mm. With this method of laying, the total area of ​​​​cold bridges is maximally reduced. The minimum consumption of the mixture is achieved as a result of the installation of blocks with the correct geometry. The approximate consumption of the mixture is 1.6 ... 1.8 kg / m² / mm (about 25 kg per 1 m³ of blocks). Works should be carried out in dry conditions, at an air temperature of +5 to +25°C. Protect the finished masonry from the weather with a construction film for a period of at least 24 hours. After completing the work, thoroughly rinse the tool with water. Water used to clean the tool must not be used to prepare a new portion of the adhesive.

PRECAUTIONS

The material contains Portland cement and silica sand, which can cause eye and skin irritation. The use of personal protective equipment is strongly recommended to protect against contact with the mixture in the respiratory tract, eyes and skin. If mixture comes into contact with skin, rinse with water. If adhesive gets into eyes, rinse thoroughly with clean water and seek medical attention immediately. Avoid breathing dust. Keep out of the reach of children.

TECHNICAL INDICATORS AND CHARACTERISTICS

The foundation	mixture of cement with mineral fillers and polymer modifiers
Color	Gray
Maximum fraction, mm	0,63
Humidity, %, no more	0,3
Bulk density, kg/m³	1500...1600
Average density of solution, kg/m³	1600...1700
Workability after mixing with water, min	90...120 (RSC 21/1) 30 (RSS 21/2)
Setting end time, h, no more	24
Temperature of work, °С	+5...+25 (RSC 21/1) –10...+5 (RSC 21/2)
Seam thickness, mm	2...3
Water holding capacity, %	≥ 99
Consistency grade	K2
Consistency according to the diameter of the cone flow, cm	14…18
Consistency retention group	St-4
Grade retention time by consistency, min, not less than	90
Strength grade	M100
Compressive strength at the age of 28 days, MPa, not less than	10
Adhesion mark	A0.8
Adhesion strength with concrete base at the age of 28 days, MPa, not less than	0,8
Frost resistance grade	F75
Frost resistance, cycles, not less	75
Open time, min, not less	10
Correction time, min, not less than	5
Approximate consumption of the mixture, kg / m² / mm	1.6...1.8 (about 25 kg per 1m³ of blocks)

The specified parameters are valid at an air temperature of 20°C and a relative humidity of 60%. In real construction conditions, deviations are possible depending on working methods and temperature and humidity characteristics.

PACKAGING, STORAGE AND TRANSPORTATION

The adhesive composition is packaged in bags of 25 kg. On a pallet 1m × 1.2m - 1000 kg (40 bags). Shelf life in original undamaged packaging in a dry place at a temperature of +5 to +25°C - 12 months from the date of manufacture. When transporting in open transport, protect from atmospheric precipitation.

ADHESIVE COMPOSITION FOR LAYING BLOCKS FROM CELLULAR AERATED CONCRETE WINTER K21/2 (WITH P/M ADDITIVE)

In winter conditions, when the air temperature is below +5°C, it is necessary to use winter adhesives, to which special antifreeze additives are added. Designed for use in winter conditions down to minus 10°С. Bags with such mixtures are marked with a special marking.

ADDITIONAL INSTRUCTIONS FOR USE

In addition to what is indicated in the instructions, when using a winter adhesive composition, the following should also be taken into account:

- store bags with mixtures in a heated room;

– use warm water (max. 60°C) and mix the adhesive in a warm room;

– the temperature of the finished mixture must exceed +10°С;

- before and after use, keep the tool being used in warm water, insulate the utensils used for the preparation of the adhesive composition and, if possible, protect the workplace from wind;

- the time of use of the heated mixture is 30 minutes;

- the blocks used in the masonry should not be frozen, snowy or wet;

- it is desirable to preheat the blocks at least to a temperature of + 1 ° С.

ATTENTION

The given information determines the scope of the material and the method of carrying out the work, but at the same time it cannot replace the appropriate training of the performer of the work. Current building regulations must be observed. The manufacturer is not responsible for the misuse of the material, as well as for its use for purposes and conditions not provided for by the instructions.

A variety of building materials often forces private developers to resolve issues with their difficult choice. This applies not only to the main structural elements, but also to auxiliary mixtures and compounds involved in the construction of buildings. In particular, when laying gas silicate blocks, it is allowed to use a traditional cement-sand mortar or a special adhesive that has a sufficient number of advantages, in addition to a higher, at first glance, price. It would seem, where is the benefit of using modern material hidden, if you have to pay more when buying it than for cement and sand combined? But in the end, the actual consumption of glue for gas silicate will be 5-6 times less compared to a conventional solution.

The popularity of gas silicate blocks

The effectiveness of the use of cellular concrete blocks for laying external walls, which include gas silicate products, lies in their structure. During the manufacturing process of the material, numerous isolated voids filled with air are formed in it, which contributes to obtaining lower thermal conductivity compared to ceramic or silicate bricks.

The size of the gas silicate block significantly exceeds the dimensions of a typical brick. With standard values, their difference is 18 units, which speeds up the construction of gas silicate boxes. An important role is played by the weight of the bearing walls, which affects the bulkiness and depth of the foundation. The mass of the wall block varies depending on the density of the gas silicate, but in any case it will be 2-2.5 times less than that of 18 bricks.

So, the popularity of gas silicate masonry is largely made up of visible savings, including those consisting in reducing the cost of heating and building a foundation. The walls do not need additional heat and sound insulation, moreover, they have refractory properties. And the clear geometric shapes of a single block product make it possible to perform fairly thin masonry joints.

It should be noted that the difference in the cost of one cube of ordinary gas silicate blocks and traditional bricks is not in favor of the latter.

Of course, gas silicate walls have their drawbacks. And the main one is the need for external wall cladding or surface plastering, since the porous material is afraid of moisture. But for the sake of justice, it is worth noting that often houses made of clay bricks are also lined with facing stone. By the way, they do this not only to improve aesthetic qualities, but also as protection against destruction under the influence of atmospheric phenomena.

Another disadvantage of gas silicate blocks is their fragility, therefore, for load-bearing walls, a denser structure of the material should be used, which has less, but still sufficient, heat-insulating properties. As for everyday situations, it should be noted that the fragility of gas silicate simply will not allow you to attach a heavy object to the wall. This fact must be taken into account.

Glue Features

Consumers have many questions before buying glue for gas silicate blocks - what volume to choose, how not to make a mistake with the type of dry mix, how to understand manufacturers and brands, how to dilute and apply the composition correctly. But first, you should get to know the material better and understand why it is he who is preferred when laying gas silicate blocks.

As mentioned above, gas silicate products have a porous structure, therefore they actively absorb moisture, which is, among other things, in a cement-sand mortar. So that the masonry does not lose the necessary strength due to its premature drying, the thickness of the seams must be made too wide - up to 1.5-2 cm. This leads to overspending of the mortar and deterioration of the thermal insulation qualities of the building envelope due to the high thermal conductivity of the cement-sand layer located between the blocks. Glue, unlike mortar, is able to securely fasten the stones together with a seam thickness of up to 2-5 mm, which saves the walls from peculiar cold bridges.

The small thickness of the seam between the blocks is possible due to their ideal shape, which allows only minimal deviations.

The adhesive mixture for gas silicate masonry is a dry composition of several ingredients:

• Portland cement;
• fine sand;
• modifying additives responsible for the retention of moisture, the absence of cracks and the plasticity of the adhesive;
• polymers that improve adhesion (adhesion) and contribute to high-quality filling of irregularities.

Glue per cubic meter of laying gas silicate blocks is spent much less than for an identical volume of traditional bricks. And the point here is not only in the thickness of the seams, but also in the surface area on which this or that composition is applied. One should only imagine that where only one block will need to be smeared with glue, the solution will be needed for 18 bricks! The savings are visible to the naked eye, even though the adhesive mixture costs twice as much as the same volume of cement-sand composition.

But the benefits of glue for gas silicate do not end there. In addition to economy and excellent adhesion, we can distinguish:

• connection strength;
• simplicity and speed of kneading;
• freezing speed;
• water and frost resistance;
• universality - work with any cellular concrete;
• availability and wide choice;
• the possibility of independent use without the involvement of professional masons.

The adhesive mixture for gas silicate blocks is produced for work in summer and winter conditions, for internal and external wall surfaces. Winter compositions are allowed to be used at temperatures up to -10 and not higher than +5 degrees. This mode is associated with the addition of antifreeze additives to the dry mixture, which prevent the normal setting of the adhesive at elevated or low temperatures. Summer adhesive mixtures are recommended to be used in the mode from +5 to +25 degrees. Permissible limits are indicated in the manufacturer's instructions on the packaging.

Dry glue is supplied in packs of 25kg. They must indicate the expiration date.

Calculation of the amount of the mixture

The economical use of the adhesive mixture when laying aerated concrete blocks is fundamental, otherwise, due to the high cost of the material, the point of acquiring it disappears. The joints should be made as thin as possible, which is facilitated by the geometry of the masonry stones and the use of notched trowels that regulate the size of the applied layer.

Depending on the thickness of the seams (2-5 mm), manufacturers set the approximate consumption of dry glue per cubic meter in the range of 15 ... 25 kg, which corresponds to the volume of one bag. The packaging indicates the approximate consumption of the material, so before buying, you should carefully read the manufacturer's instructions.

Preparation of the adhesive composition

It is necessary to dilute dry glue in full accordance with the instructions. It is located on the back of the package.

For cooking, you need a clean deep container, preferably a bucket. First, water is poured into it, and only then the mixture is poured. To obtain a homogeneous mass, it is important to maintain just such a bookmark order. The solution is kneaded using a special nozzle installed in a drill instead of a drill, or using a construction mixer. Whipping the mass should not be, therefore, power tools should operate at low speeds.

For a short period of time, the liquid adhesive is allowed to settle, after which it is mixed again. The consistency of the finished mixture is checked by applying it to the gas silicate surface with a notched trowel. The mass should pass between the teeth easily, leaving a clear outline of the grooves that do not blur later.

It should be borne in mind that the glue begins to thicken after one and a half to two hours, so the solution should be kneaded in portions. Manufacturers claim an open working time with a solution of 25-30 minutes.

The diluted mixture is placed on the surface of the block using a notched trowel or a special bucket-trowel. The new stone is lightly pressed against the previously laid block, after which the element is knocked out with a rubber hammer until it finally settles. Correcting the position of the gas silicate block is allowed for 10 ... 15 minutes. Grouting is carried out as one row of masonry is installed.

The adhesive hardens almost every day, and it acquires its final strength after 72 hours. A more accurate time should be indicated on the package.

Adhesive selection criteria

The quality of the adhesive composition intended for laying gas silicate blocks largely depends on the manufacturer of the product. When buying, it is recommended to give preference to well-known manufacturers with a good reputation, and not be seduced by a low price, indicating a likely fake, and not be tempted by the shares of one-day companies that choose low-quality ingredients for the mixture. It must be understood that a quality product cannot have a low cost.

Attention should be paid to the storage conditions of the adhesive in the warehouse or at the point of sale, which do not allow high humidity and low temperatures. If the regime is not observed, the adhesive will lose its physical and mechanical properties, which ultimately affects the insufficient strength of the gas silicate masonry. You should not forget about storage conditions in the case of preliminary purchase of building materials, otherwise the adhesive mixture will have to be purchased again.

It is not recommended to opt for bulk materials without packaging, since no one can guarantee what is mixed there and who the manufacturer is. The same applies to containers with a dull, blurry pattern or indistinct inscription, even if it is a trademark. What self-respecting manufacturer would pack their goods in an unpresentable package today?

Popular adhesive mixtures

The construction market is filled with various dry compounds designed for laying gas silicate blocks. Each region may have its own manufacturer, but the products of large companies are found almost everywhere. On domestic shelves there are products:

• AEROSTONE - Dmitrovsky plant of aerated concrete products;
• BONOLIT - Noginsk company "Bonolit - Construction Solutions";
• THERMOCUBE - Kostroma Plant of Building Materials;
• PORITEP - Ryazan plant of cellular concrete;
• ECO - Yaroslavl Building Materials Plant;
• YTONG - Mozhaisk plant for the production of cellular blocks;
• TAIFUN - Grodno company "Typhoon";
• ILMAX 2200 - Belarusian company for the production of dry mixes "Ilmax";
• IVSIL BLOCK - a well-known Russian manufacturer "Ivsil";
• AEROC - St. Petersburg enterprise for the production of cellular concrete "Aeroc SPb".

The glue of the above brands is of high quality and is in demand on the Russian market. But this list does not limit the number of manufacturers, but mentions only a small part of them.

The rapid development of the building materials market makes it possible to make a choice in the richest assortment of various materials needed in construction. Since ancient times, when building a house, important factors influencing this process have been environmental friendliness and the possibility of saving heat in the house. To this is usually added the desire to carry out construction at a minimum cost.

Various types of cellular concrete are especially popular with the consumer: foam blocks, gas silicate blocks, foam concrete. First, let's figure out why this material is popular with the consumer.

An important factor when choosing cellular concrete is its low thermal conductivity compared to brick. This is possible thanks to the technology of its manufacture.

The most common components: sand, water, cement, lime are raw materials for the production of cellular concrete, but its structure is unusual in the presence of numerous small pores and voids filled with air. Namely, air is the best and natural heat insulator.

Gas silicate blocks are an excellent replacement for bricks. Their standard size is 60x30x20 cm, and when using only one such block, a space equal to 18 bricks is closed. The mass of these bricks will be 65 kg, and the gas silicate block with a density of about 600 kg / m³ - only 23 kg! These blocks, having a convenient size for laying and an ideal geometric shape, greatly pressed ordinary bricks in the construction of buildings and structures.

The consumer justifies his choice in favor of gas silicate blocks due to its special thermal insulation properties. By reducing the funds spent on heating the house, the costs of gas silicate blocks are more than paid off.

Feature of work

In order to minimize heat loss in the room, when working with gas silicate blocks, it is necessary to use aerated concrete glue. Let's decide what the advantage of this glue is.

When using a conventional cement-sand mortar to connect the blocks, the thickness of the seam between the blocks turns out to be too wide - about 15-20 mm. Cement-sand mortar, having poor thermal insulation properties, does not allow to keep the heat in the room as much as possible, thereby reducing the use of the aerated concrete blocks themselves to almost zero.

But it is not possible to reduce the layer of cement-sand mortar to a minimum of 3-4 mm, since the blocks absorb the water contained in the mortar, and therefore the strength of the masonry is lost.

What should be the "correct" glue

Unlike cement-sand mortar, special glue can significantly reduce the size of the resulting joint - up to 2 mm. However, it is not only the thickness of the seam.

In glue for working with gas silicate blocks, certain additives are used that significantly increase its thermal insulation properties.

The question arises: why, when laying gas silicate blocks, there can be such a small thickness of masonry, because this is impossible when working with bricks. This is primarily due to the shape and size of the blocks used; as mentioned above, blocks are made with minimal deviations from the ideal shape. Therefore, the use of glue becomes possible.

Let's make a list of the main advantages when using glue in working with gas silicate blocks:

• cheap glue. Calculate: the consumption of such glue is much less (six times) than sand-cement mortar, and the cost of glue is only twice as high;
• No cold bridges- layers of material with high thermal conductivity, the formation of which leads to an increase in heat loss and a decrease in the uniformity of the masonry;
• Adhesive durability to influence of an atmospheric precipitation (a rain, a frost);
• Strength– in comparison with the use of a cement-sand mortar, the strength of the masonry with the use of glue is much higher.

Preparation of the adhesive solution

The instructions indicate the ratio of parts of the mixture and water. An adhesive solution is prepared in an ordinary clean bucket. Following the advice of the instructions, the mixture is added to the water prepared in the bucket and mixed thoroughly. Mixing is carried out using a drill with a special nozzle.

After the first mixing, the solution should settle, then mix again. Having received a homogeneous mass, the solution can be considered ready for use. Since it tends to harden, you should not prepare an excessive amount in advance.

The resulting mixture is applied to the surface of the gas silicate block and leveled with a notched trowel.

Adhesive selection

When buying glue, due to the variety of materials on the market, a natural question arises: which manufacturer to prefer? Today, the choice of glue is not a problem, since this segment is quite saturated, and you can choose glue from both imported and domestic production.

Consider several noteworthy types of glue for gas silicate blocks.

• Ytong has done a great job. Adhesives of this company are indispensable assistants in building a house;
• Taifun Master - adhesive options for laying gas silicate blocks with excellent characteristics;
• ilmax 2200 is an excellent choice when working with gas silicate blocks; allows you to eliminate defects such as bumps, chips, potholes.

Gas silicate blocks have many advantages over other building materials, however, when using them, there is also a need for “wet” processes when plastering and puttying. Let's consider how to properly apply plaster with a minimum of loss in time and loss of material.

Plaster of gas silicate blocks

The following tools are required for plastering a gas silicate block:

• the rule is to “pull” the solution between the beacons;
• beacon profiles - used when leveling the wall surface;
• grater - serves when grouting the applied layer;
• plumb - used in determining the geometry of plastered walls;
• trowel and ladle - needed to throw the solution onto the wall surface;
• drill and nozzle to it (nozzle-mixer) - stirring the mixture;
• plastic container - the solution is prepared in it.

Before the process begins, the surface of the wall is cleaned of dirt and dust. To increase the adhesion of the mortar, notches are made on the surface of the gas silicate block - there is an increase in the area of ​​​​contact of the plaster mortar with the wall.

With the help of a plumb line, the evenness of the walls is determined.

Typically, plaster compositions are applied with a thickness of 2 cm, since with a greater thickness they become loose. If for any reason a greater thickness of the solution is required, then the application is done in several layers.

For internal plastering, gypsum and gypsum-lime mixtures are used; for outdoor work - cement.

The plaster mixture is prepared in a plastic container: the dry mixture is poured with water and stirred with a drill to a creamy consistency.

The plaster is applied to the surface of the wall with a ladle or trowel. The life time of the cement mortar for plastering is about 30 minutes, gypsum - 20 minutes. Therefore, the preparation of the solution is carried out gradually.

Since gas silicate blocks are afraid of water, it is recommended to use special plaster, which should have the following characteristics:

• adhesion to the gas silicate block 0.6 MPa;
• strength after 28 days 20 MPa;
• viability is not less than 2 hours;
• the thickness of the applied layer is 3-6 mm;
• frost resistance 35 cycles;
• consumption with a thickness of the applied layer of 1 mm - 1.3-1.5 kg / m²;
• be water repellent.

Walls of gas silicate blocks must be prepared for finishing as follows:

• Before plastering, the wall must be cleaned of dust, stains, stains and debris.
• then the surface must be primed with a deep penetration strengthening mixture.
• for plastering gas silicate blocks, a reinforcing fiberglass mesh must be used, which gives strength to the plaster after it dries.

Glue is a mixture of substances that allows you to reliably adhere materials to each other. And in order for the seam to be strong and durable, a quality product should be used. To fix the gas silicate blocks, you need a special glue. Such a composition usually contains sand, cement, as well as organic and mineral plasticizers.

Currently, a wide range of products is presented in trade for working with gas silicate blocks. The result of the selection of such a composition is influenced by the preferences of the master and the conditions for the laying work.

What to choose a mixture for laying blocks

To recognize which adhesive for gas silicate is the best, it is worth considering customer reviews who have already managed to test the material on their own experience. Let us dwell in detail on the brands of glue that have gained the greatest popularity.

"Zabudova"

This mixture is great for mounting blocks in the winter. This is possible thanks to the ingredients included in it. There is a special additive that is not affected even by severe frost (frost-resistant). Most builders speak positively about the product, because it has such advantages as ease of application and elementary use. In addition, Zabudov's glue is inexpensive, which provides it with a leading position among all ready-made dry adhesives.

"Prestige"

This mixture is also not afraid of frost. It is used for laying blocks of cellular concrete, as well as slabs. A characteristic advantage of the glue is the speed of its preparation. In terms of economy, this composition is slightly inferior to the first, since its cost is slightly higher.

Bonolit

Such a composition for a gas silicate block can be used both in summer and in winter. Its main advantage lies in environmental friendliness. The glue does not contain unwanted impurities and toxins, absolutely does not pose any danger to human health. Perhaps this affects its cost, because it is more expensive than the options considered earlier.

Today, this building composition is actively used in the laying of gas silicate structures. The reputation of the adhesive is won by its positive properties:

1. The excellent thermal insulation characteristics of the mixture make it as similar as possible to cellular concrete. This will forever forget about frozen walls and heat leakage through the joints in the masonry.
2. The composition does not lose its properties even in direct contact with water, as well as the influence of very low temperatures.
3. The mixed solution is characterized by excellent plasticity, which makes its use comfortable.
4. The mixture is completely environmentally friendly. There is no release of toxic substances, since the product does not contain harmful impurities.
5. The composition is more expensive than previous products, and this is due to its qualities.

Aeroc

Mixtures of this brand are characterized by high strength characteristics. The composition is widely used in masonry blocks of cellular material, as well as for lining with a thin layer of blocks of internal and external surfaces. It turns out a seam with a thickness of 1-3 mm.

Glue is very popular due to the following properties:

• there are no “cold bridges” in the masonry;
• not exposed to moisture;
• not afraid of severe frosts;
• you can use the prepared solution for two hours, during which time it will not harden;
• capable of passing steam.

The high adhesion of the mixture makes it possible to ensure the solidity and high strength of the buildings under construction. The adhesive consists of cement, mineral fillers, as well as organic and polymeric modifiers.

"Win"

It is a multicomponent dry mix based on cement, quartz sand and various modifying additives. It is used for laying silicate block structures. Glue is quite suitable for summer and winter work. The material is popular as it is compatible with most Russian-made gas blocks.

The ready-made solution is highly elastic and technologically advanced, does not stick to tools very much. The applied layer is characterized by good moisture resistance. The adhesive has excellent holding power.

Mixtures of this brand are used for thick-layer masonry in the winter and summer seasons. In addition to laying blocks, they are widely used in the installation of ceramic tiles, attaching it to the blocks. When applying the composition, it is not necessary to level the surface. You can leave slopes and drops up to 1.5 cm. It is often used for indoor work to level block walls.

All presented compositions are safe, endowed with good plasticity and able to withstand severe frosts. Which mixture is best, you will decide when you explore them empirically.

The answer to the question of which glue is the best is ambiguous. The fact is that we have presented the best adhesive mixtures, according to the opinion of builders who have checked all their advantages and disadvantages in their work. The selection of glue can be carried out not only on the basis of personal preferences. Be sure to take into account the type and conditions of laying work.

How to calculate glue consumption

The dry composition is packed by the manufacturer in bags weighing 25 kg. The manufacturer chose this number not by chance, since this is the optimal mass of powder for the preparation of glue, sufficient for laying one cubic meter of blocks. This is provided that the technology for the production of the mixture and its application are not violated.

Let's clearly analyze the calculation of glue consumption using an example:

1. Initially, you tentatively determined that for the laying of all walls you will need, say, 63 cubic meters of gas silicate blocks.
2. With a laying layer thickness of 3 mm, the consumption of glue per 1 cubic meter of blocks will be 63 packing bags.
3. If the laying seam is 2 mm thick, then the mass of the required adhesive will be 5 kg less. In this case, 63 cubic meters will have to be spent
   63 x 20 = 1260 kg of dry glue.
   Move on.
   1260 / 25 = 50.4 bags.
   Rounding up the figure, the result is 51 bags.
4. The calculated value is the smallest amount of dry mix that will need to be spent on the building. Provided that its construction involves the use of 63 cubic meters of aerated concrete blocks. If we know the price, we can easily determine the total cost of dry glue.

If the construction involves the use of a solution of cement and sand, and the scope of work will be the same, then you will need 2 cubic decimeters of glue. That is, 1 cubic meter of mortar is needed for laying 5 cubic meters of blocks.

To prepare a cube of mortar, you will need up to 7 packs of cement. The total cost will also increase due to the price of sand and the rental of a concrete mixer. Considering all this, it is not difficult to determine how much cement is needed to lay 1 cubic meter of gas silicate: 7/5 = 1.4 bags.

By doing the right cost calculations, it is easy to verify the low cost of the adhesive. The remaining priorities can only be set by you.

When erecting modern buildings, it is important to ensure reliable adhesion of materials, which is achieved through the use of high-quality glue for gas silicate blocks. A properly selected adhesive composition and an accurate calculation of its consumption are the key to the longevity of erected buildings.