In the construction of buildings made of porous concrete, glue for gas silicate blocks is in demand, which stands out for its mass of competitive advantages compared to classic cement mortar. The product is a universal mixture for the highest quality bonding of gas and foam concrete slabs, ceramic blocks and brickwork.
The composition of the adhesive for gas silicate includes the following components:
Polymer components are designed to ensure the plasticity of the mass and improve the adhesive properties of the solution. Modifiers help retain internal moisture, which protects the seams from cracking.
High surface adhesion properties are among the key features of adhesive formulations. Also note the low level of thermal conductivity of the product, which is due to the absence of voids in the seams.
When choosing a binder for laying porous blocks, it is recommended to be guided by several criteria:
The main parameter when calculating the solution consumption per 1 m³ of the base is the thickness of the binder layer. With a layer thickness of not more than 3 mm per 1 m³ of surface, 8-9 kg of the working composition is required.
Adhesive for laying gas silicate blocks is characterized by high performance and is valued for its ease of use. Key advantages of building material:
Products are of interest for their budgetary cost at an economical expense. Although a universal dry concentrate costs twice as much as a classic cement-sand mortar, the consumption of glue for gas silicate blocks is 5 times less: the mass is applied with a minimum layer thickness not exceeding 2-3 mm. It also helps:
In addition, due to the minimum thickness of the seams, the laying of gas blocks is smooth and beautiful.
The presence of water-retaining components in the adhesive composition eliminates the formation of mold between aerated concrete blocks, which positively affects the performance of the structure.
The disadvantages of glue for gas silicate include exactingness in the evenness of the treated surface and high prices for products, although due to the cost-effectiveness of consumption, the high cost of building materials is leveled.
On the market there are seasonal varieties of dry adhesive concentrates based on white and gray Portland cement, as well as compositions in foam format in cylinders:
According to experts, for maximum effect, the frost-resistant mortar is recommended to be used at temperatures ranging from + 5 ° C to -15 ° C, this guarantees the absence of errors and cracks in the seams.
The process of masonry drying at an elevated ambient temperature is fraught with the risk of microcracks in the bonding layer, and as a result, the thermal conductivity characteristics of aerated concrete deteriorate.
Porous concrete blocks are known for their inertness to changes in ambient temperature. In this case, an important role is played by the correct technology for applying the adhesive composition while strictly following the manufacturer's instructions.
Freezing moisture is fraught with a deterioration in the quality of the seam, therefore, during winter work, the aerated concrete masonry should be covered with a tarpaulin.
Adhesive foam for gas silicate is an innovative solution in this segment. The building resources market offers an adhesive for porous concrete blocks in the form of foam in cylinders, for which a special device is used in the form of a construction gun.
When deciding which adhesive for gas silicate blocks to choose, it is worth studying the features of current offers.
Adhesive for Aerostone gas silicate blocks 
Adhesive for gas silicate blocks Bonolit The preparation of the working solution is carried out according to the instructions of the manufacturer of the dry concentrate. The general steps and principles for preparing the adhesive mixture include the following points:
The solution is kneaded in portions in accordance with the intensity of work on laying aerated concrete. The term of use of the working mixture is about 3-4 hours, but this figure may vary depending on the brand, operating conditions and other design factors. It is not allowed to add water to the finished solution, while the glue should be periodically stirred during operation.
It should be borne in mind that the consumption of glue for gas silicate depends on a number of factors, including:
The adhesive solution consumption formula looks like this: S \u003d [(l + h) / l * h] * b 1.4, where:
In order to perform the construction of walls from porous concrete with the highest quality, it is necessary to use adhesive mixtures, taking into account their purpose: for interior or exterior work, for laying gas silicate at positive or negative ambient temperatures. It is also worth paying attention to the setting speed of the working solution, this parameter varies from 5 to 25 minutes, depending on the brand of product.
At the same time, the minimum curing time for the adhesive base in a block structure is 24 hours, and the final result requires a period of at least three days after laying.
When choosing an adhesive for aerated concrete, I want to know how they differ from each other and whether there are other adhesives. Yes, there are other adhesives (foam, cement mortar), which we wrote about in this article. Well, now specifically about the glue, which is very plastic, sets quickly, and also hardens without shrinkage.
The composition of any cement adhesive for gas blocks includes:
Portland cement is the main adhesive binder. The finest sand serves as a filler. Modifiers retain moisture. Polymer additives improve the bonding properties of the adhesive and adhesion to aerated concrete.
When choosing an adhesive, you need to pay attention to its performance characteristics, which can vary as follows:
It is very important to choose glue according to the ambient temperature, if the thermometer is below zero, use frost-resistant adhesives. Also try to choose an adhesive with a minimum recommended application thickness.
Advice! To reduce glue consumption, try to prepare small portions, precisely designed for several gas blocks.
| № | Manufacturer | Glue price for 25 kg (rub) | Consumption (kg) per 1 sq.m layer 2 mm | Seam thickness |
| 1 | Ceresit CT 21 (Winter) | 300 | 2.6 | 2-10 |
| 2 | Baumit PBK |
200 | 2.5 | 2 |
| 3 | Baumit (winter) | 270 | 3 | 3 |
| 4 | KREISEL | 250 | 2.5-3 | 1-3 |
| 5 | AEROC (winter) | 240 | 2 - 3 | 1-5 |
| 6 | Ytong(winter) | 260 | 3 | 1-3 |
| 7 | Bonolit | 220 | 3 | 2-8 |
| 8 | BIKTON KLEB FROST | 230 | 3 | 2-3 |
| 9 | Polymin - PB 55.75 | 160 | 2 | 2-10 |
For laying aerated concrete also use:
Adhesive foam for laying aerated concrete is a fairly new material that has not been tested by time, and therefore it does not inspire confidence in many. In addition, the issue of environmental friendliness of this foam becomes. Not all foam is suitable for the construction of load-bearing walls, although some manufacturers have created this option.
If we compare the consumption of foam and ordinary glue, then they are approximately equal. It is believed that the seams on the foam are 30% warmer than ordinary glue. In terms of price / consumption ratio, it comes out about the same as glue.
Usually, the calculation of glue is done by cubic meters of aerated concrete. Manufacturers write that the consumption is about 25 kg of dry mix per cubic meter, but in practice the consumption is higher and amounts to 35-38 kg, that is, exactly one and a half bags of dry mix.
Such calculations are suitable for gas blocks of any thickness, as the total area of the applied surface of blocks in a cube is considered.
The consumption of glue is strongly influenced by the geometry of the blocks, the smoother the blocks, the better. You also need to take into account the glue for the reinforcement in every third row.
Glue can be applied with different tools, for example, a trowel paired with a notched trowel, or a notched bucket, or a carriage.
Aerated concrete carriage is a professional tool that will greatly speed up the work. The carriage is designed in such a way that the thickness of the glue applied to it is always the same, and the special container with glue is very easy to refill. The cost of the carriage is about 1000 rubles. Carriages come in various sizes, for different gas blocks.
Aerated concrete adhesive should be stored in a heated room with low humidity. Add exactly as much water to the dry mix as it says on the package. It is advisable not to add very cold water, as it will not set well, the water should be warmer than +10. Before applying glue, the blocks must be cleaned of dirt, dust and everything superfluous. Everything is pretty simple.
For laying gas silicate blocks, special glue or ordinary mortar can be used. According to experts, it is best to use glue for the construction of external walls.
For laying gas silicate blocks, it is best to use special glue.
The use of special glue for masonry has the following advantages:
Glue for gas silicate blocks allows you to connect elements with a thickness of a masonry joint (2-10 mm).
Glue for the gas silicate block is a dry adhesive mixture of cement with small additives and fillers in the form of water-retaining, plasticizing, air-repellent substances. These additives help to increase the strength, frost resistance, water resistance and other parameters of the adhesive.
Why is the glue for the gas silicate block better than the mortar of cement and sand?
All elements that are part of the adhesive for blocks have increased strength, frost resistance and water resistance.
Among the builders there are opposite opinions. Some argue that it is absolutely not difficult to perform with glue, while others argue the opposite: in order to perform block laying with glue, competent masons are needed. The situation is further complicated by the fact that there are such regions for which it is absolutely not common and it will be quite problematic to find specialists to perform such work. But, according to experts, a non-professional can also perform block laying. To do this, you just need to carefully study the topic of construction work using gas silicate and foam concrete blocks, and then clearly follow the instructions studied.
A distinctive feature of the adhesive mixture for gas silicate and foam concrete blocks is the presence of a special additive that prevents the blocks from quickly absorbing moisture from the adhesive mixture. This additive retains moisture in the adhesive solution, which allows you to reliably glue gas silicate blocks.
Of course, it is most reliable to purchase glue from a direct block manufacturer. But very often its cost is unreasonably high. As a rule, the price tags for such goods are wound up several times.
Experts say that for the construction of a private house using gas silicate blocks, any glue that is designed for outdoor work can be suitable.
In order to prepare the glue, you need to add a dry mixture to the construction bucket with a small amount of water, while stirring constantly. Stir again after 7-10 minutes.
The dry adhesive mixture for gas silicate and foam concrete blocks is mixed with water using a construction mixer or a drill with a special nozzle. In the absence of a mixer, it should be noted that the greater the power of the drill, the better the adhesive mixture will mix. Any water can be used, the water consumption is indicated on the packaging of the dry mix.
So, pour the required amount of water into the construction bucket. With constant stirring, gradually add the sticky dry mix. Approximately 7-10 minutes after complete dissolution, mix the adhesive mixture again.
To maintain the required consistency of the adhesive during construction work, it is necessary to mix it periodically.
In order to properly prepare the glue, there is no universal recipe. Each brand and each manufacturer has its own recipe for preparing an adhesive solution. Before purchasing, it should be remembered that the quality of the preparation of the adhesive is directly dependent on the amount of water added to the solution and the dry mixture is added to the water, and not vice versa.
You should also be aware that an overdose of water significantly impairs the characteristics of the adhesive mixture. Therefore, before preparing the working mixture, you need to carefully study the instructions for its preparation.
Very often, some home craftsmen ask the question: what glue to use when laying blocks in winter? Experts say that in the winter season, when the air temperature reaches -15 ° C, it is necessary to use frost-resistant glue, which includes anti-frost additives, as evidenced by the inscription on the packaging of the dry mixture.
The laying of the blocks themselves is carried out 15 minutes after the work surface has been prepared.
First of all, if necessary, you need to prepare the work surface. It must be firm, dry and free of foreign matter. Soot, dust, oil and loose elements must be removed. Significant surface irregularities must be leveled; for this purpose, glue for gas silicate and foam concrete blocks can also be used.
So, on a pre-prepared work surface, we apply a layer of adhesive mixture using a trowel, after which we level it with a notched trowel. must be laid no later than 15 minutes after you have applied the adhesive to the work surface. You can adjust the position of the block for 10-15 minutes after you have laid it. The setting time of the adhesive at air and base temperatures from -15 to +25°C is 2 days, and the adhesive solution gains full strength after 72 hours.
Proper laying of the block involves applying glue to the horizontal surface of the already laid out bottom row and to the vertical part of the previous block. If necessary, lay an additional sawn block, it must be coated with glue on both sides.
The correct order of applying glue: on the horizontal surface of the already laid out bottom row and on the vertical part of the previous block.
Glue for gas silicate and foam concrete blocks can significantly reduce the consumption of the adhesive solution, due to its special composition, which allows you to lay blocks with seams of 2-3 mm. Of course, the consumption of glue primarily depends on the quality of the blocks used. When using blocks with a perfectly even surface, the adhesive consumption will be approximately 20 kg / m³ with a masonry layer thickness of 2 mm. Well, and, accordingly, if there is a need to lay blocks with a thicker layer, then the amount of glue will be increased. Experts say that it is always necessary to purchase an adhesive dry mix with some margin.
When using glue for laying gas silicate and foam concrete blocks, it should be noted that only the second row of blocks is laid on the glue. The first row must be necessarily laid on the cement mortar. This is done in order to somehow smooth out the existing unevenness of the foundation surface.
Cold bridges appear due to a decrease in the thermal conductivity of the structure during its operation.
If you plan to lay gas silicate blocks in one row, then it is imperative to use glue. Since it has the same density as gas silicate. By laying gas silicate and foam concrete parts on a cement mortar, which has a density of about 2000 kg / cm², in the end you will get “cold bridges” in the form of masonry joints. The consequence of the formation of "cold bridges" will be a significant decrease in the thermal conductivity of the structure during its operation. Based on this, experts who have experience in using glue for, argue that the most practical way to lay such blocks is in 2 rows (20 cm each).
It must be remembered that only the second row of blocks is placed on the glue, and the first is placed on the cement mortar.
When performing masonry work, one should take into account external factors that play a rather important role. In particular, this refers to the air temperature and humidity in the room. For example, lowering the air temperature in the room, as a rule, entails a significant increase in the setting time of the adhesive. Conversely, an increase in temperature sharply reduces the setting time. In addition, shrinkage cracks may form due to room temperature. In rooms with high humidity, the drying of dry adhesive mixtures slows down significantly. And in rooms with insufficient humidity, due to the enormous setting speed, microcracks appear in the masonry joints. So, if you do not want to get an extra headache, keep an eye on the humidity and air temperature in the room.
The more the adhesive solution costs, the more professionalism will be required to use it. A good adhesive mixture must be correctly (thinly) put, otherwise using it will cost you a solid "penny".
And for such work, a certain skill, dexterity and a fairly even foam concrete or gas silicate block will be required! It should be noted that expensive mixtures are not designed for thick masonry layers, they will simply crack and burst. If all of the above is missing, then laying should be done on a regular mortar of cement and sand.
It is necessary, and rightly so! But this is not always possible. The reason lies in the lack of experienced specialists who could provide a masonry joint of 2-3 mm. Not every qualified bricklayer is able to perform such work. Based on this, when hiring masons, immediately negotiate this condition with them.
Gas silicate blocks are a structural and heat-insulating material with a cellular structure. They are obtained from a mixture of quartz sand and lime, in addition, with the addition of a small amount of cement. Therefore, glue for gas silicate blocks is necessary for the construction of walls, as well as any other structures that have a joint thickness of 2 to 10 mm. It is also suitable for leveling vertical or horizontal surfaces.
Such glue is a gluey dry mix, consisting of cement, various additives and fine filler. Additives have water-retaining and plasticizing properties. With their help, strength, frost resistance and moisture resistance are significantly increased. These qualities are very important, since construction is often carried out in adverse climatic conditions.
High-quality gas silicate adhesive has excellent thermal insulation properties, is incredibly durable, has high adhesion and is easy to apply. It can be used to connect not only gas silicate blocks, but other cellular concrete materials.
It is divided into two main types - summer and winter.
Winter glue can be used at temperatures from +5 to -10 degrees for indoor as well as outdoor work. It contains special antifreeze additives. A snowflake is drawn on the packaging of such glue.
The most common summer mixture is Insi brand glue. It can be used at temperatures from +10 to +25 degrees for laying walls and various partitions. It is economical, comfortable and has excellent water-repellent properties. Price from 185 rubles per 25 kg.
Method of preparation and application
To properly prepare the glue, you will need strong dishes, a plastic bucket is ideal. It is necessary to pour clean water into it, and then add the dry mixture. It is necessary to perform the actions in this order, and not vice versa, it is also impossible to pour out the whole mixture at once, this should be done gradually. Water needs to be constantly mixed, a drill with a special nozzle - a mixer will help well with this.
Glue consumption is approximately 1 kg per 0.20 l of water. But the consumption of the finished solution per 1 sq.m. is about 10 kg. Do not immediately dilute too much of the mixture, as after 80 minutes it will harden and become unusable. Work with the solution is carried out at any time of the year, but it is worth considering that the temperature should not be lower than -15 degrees. It should be noted that this instruction is not universal, the packaging of various brands describes in detail the method of preparation and use.
For laying gas silicate products, you will need tools such as a smooth grater or trowel, and for leveling, a spatula.
The adhesive used for gas silicate should resemble sour cream in its consistency. It is applied using a trowel, carriage or a special bucket with a curved edge. After it is applied, it is immediately leveled with a spatula. After laying the first layer, the surface of the blocks must be leveled with a planer. After 10 minutes, the adhesive sets, but completely dries only after 72 hours.
Why is glue better than mortar?
When faced with construction work for the first time, many site owners do not understand why builders choose glue for laying gas silicate blocks instead of mortar?
When using the solution, you may encounter the following problems:
Adhesive Benefits
The building materials market is now developing rapidly, constantly replenishing with new and new commercial products. Each of them has its own characteristics, improved quality and improved structure. So, for example, if earlier the walls of the house were built of bricks laid on a heavy cement mortar, and created huge loads on the foundation, now everything is different. From lightweight block elements, you can build a durable dwelling by gluing them together with an adhesive solution. This article will tell you about what constitutes glue for laying gas silicate blocks or other types of block structures.
The construction of a new architectural object invariably entails the choice of the necessary building materials. For a long period of time, brick remained the main element of construction, but now it is used less and less. The main reason for this is the complexity of laying bricks. In addition, the price of ceramic analogues of bricks is significantly higher compared to the cost of glue for foam blocks.
Building blocks, presented in a wide variety on the construction market, have become a worthy replacement for bricks today. Their main varieties are as follows:
Adhesive for foam concrete and other types of block structures is gaining popularity year after year. In the construction industry, it is used more and more often, and the demand for the material is due to many undeniable advantages. First of all, of course, there is a reduction in labor costs, because there is no need to knead the mortar based on cement, strictly observe the proportionality of the components, etc. And the question of how to calculate the amount of glue for foam blocks is solved faster and easier.
The basis of any adhesive composition is a cement-sand mixture, as well as a variety of polymer additives with the properties of structure formation, moisture retention and plasticization. It is not possible to prepare such a solution with your own hands, but manufacturers set a very affordable price for products of this kind in the range of 150-550 rubles for one bag weighing 25 kg. With a reasonable consumption of material for laying 30 blocks with standard parameters (600 * 200 * 300), one bag of dry adhesive mass is taken.
A large number of building blocks have now been invented, and each variety requires its own adhesive composition with certain properties.
Glue for foam blocks is a special mixture based on cement and sand, and the structure of these materials is somewhat different from that of the bulk composition used to prepare the classic cement mortar. Among the components of the adhesive for blocks is quartz sand, crushed to the smallest fraction.
Advice! Prepare the adhesive mixture for blocks with the calculation of its production within 2-2.5 hours. After this time, the solution begins to thicken rapidly, losing its original properties. Adding water will not correct the situation, leading to a deterioration in the characteristics of the adhesive.
After applying the adhesive composition, its thickness is minimal due to the absence of coarse-grained components. In addition, the mortar quickly gains strength due to the use of high-quality Portland cement in its composition. When laying the foam block on glue or a solution with an adhesive base, you should know that this material consists of a whole range of additives that significantly improve its technical characteristics. Among these components, there are compounds that retain moisture, increase the moisture resistance of block masonry and prevent the formation of mold fungi. The presence of special additives in the adhesive mortar gives the joints between the blocks greater plasticity than that of a conventional cement mortar.
Such a property as plasticity reduces the likelihood of deformations in the masonry, the appearance of cracks in it, distortions and cracks in the wall of blocks. The inclusion of auxiliary additives in the adhesive composition by manufacturers makes it possible to obtain frost-resistant adhesive for foam blocks. Its main advantage lies in the fact that winter glue for foam blocks allows installation work even at low temperatures down to -15 ºC.
The use of ceramic blocks for the construction of buildings has recently become more in demand. Ceramic blocks look like bricks, but inside they have a void. They are made from baked clay, and the dimensions of such building material are significantly larger than those of ordinary bricks. Due to the internal emptiness, the thermal conductivity of the material decreases, and the thermal insulation properties, on the contrary, increase.
In order for the laying of ceramic blocks to be perfect, experts recommend using a special glue. Such a solution helps to create seams with a thickness of only 2 mm. The composition of the adhesive in its structure, thermal conductivity and density is similar to ceramics, which makes it possible to form a uniform heat-insulating plane.
Glue for ceramic blocks is made from a cement-sand mixture with additives in the form of imported plasticizers. These components are made from organic and mineral raw materials, and are characterized by water-repellent properties.
Polystyrene concrete blocks are among the building materials made of lightweight concrete. They contain mineral compounds of organic origin. The main components of the adhesive solution are water, Portland cement and additives, including small expanded polystyrene granules with a porous structure.
The unique combination of various useful components in the adhesive endows the finished walls with such characteristics as good water repellency, good thermal insulation properties, rot resistance, good load-bearing capacity, transferred to the finished walls. Such an adhesive composition is sold in the form of a dry mixture, and requires mixing the powder with water and thorough mixing before use.
Glue for cellular blocks, which has another name - gas silicate, is represented in stores by various brands that represent different manufacturers. Prices for glue for gas silicate blocks vary between 115-280 rubles, but this cost does not always indicate the good quality of the adhesive composition. Sometimes the consumer has to overpay money only for a promoted brand. In order not to make a mistake, construction experts advise purchasing from the manufacturer not only the glue itself, but also the building blocks of the desired variety. According to statistics, the use of gas silicate blocks helps to reduce the total cost of construction by about 40%.
Glue for gas silicate blocks has several useful advantages, namely:
When choosing glue for a gas block, you should pay attention to its composition and technical characteristics, because such information will help to get an accurate picture of what components the solution is made of.
This is interesting! Frost-resistant adhesive for gas silicate blocks consists of special substances that allow it to be used even at low temperatures (-15 ºC, and sometimes even -25 ºC) outdoors.
Information about the size of the fraction of bulk materials that make up the solution will be useful, at what temperatures the manufacturer recommends using the product, what should be the recommended layer thickness. It is also worth paying attention to the label, which displays useful data on the period of hardening of the adhesive solution, the amount of adhesive used in the course of work, etc.
Universal adhesive for blocks of different brands and types allows the consumer to purchase a high-quality dry adhesive mixture at a favorable cost, which can later be used both for gluing foam block elements and for fixing aerated concrete, ceramic, polystyrene concrete blocks with each other. Among the most famous universal adhesives for building blocks are TM Knauf and Varmit adhesives. They are designed to work in winter and summer periods of the year, are made from environmentally friendly components, frost resistance, moisture resistance and cost-effectiveness.
The consumption of glue when laying walls from foam blocks depends on several factors. The type of the block element is important in the calculations. For example, for a cellular block of glue, more will be needed, since the material is porous, which means it absorbs moisture well. Also, the consumption level depends on the brand and manufacturer of the adhesive composition.
In general, the consumption of any type of adhesive for blocks is more economical than a conventional solution of sand and cement. Laying blocks with its use is obtained with thin seams, respectively, and the consumption of the composition is reduced by about 6 times. The use of such modern material as glue for blocks makes it possible to achieve a seam with a maximum thickness of 5 mm, and with the observance of laying technologies - only 2 mm or even 1 mm. A small seam prevents the development of cold bridges in the walls, and the consequences associated with this unpleasant phenomenon - the appearance of fungus and dampness.
The geometry of the blocks themselves also has a certain influence on the consumption of glue. If the building material is uneven, then the adhesive solution for its installation will need more.
To minimize mortar costs, it is important to determine how much glue is needed for laying a cube of foam blocks. Knowing this information, as well as the exact number of block elements, you can easily calculate the amount of dry glue required for construction. According to the standards established in construction, the consumption of glue for aerated concrete per 1 m 3 is no more than 1.6 kg, subject to a thin seam of 1 mm. However, this condition is met only with a perfectly flat surface. Sometimes up to 30 kg of dry adhesive is used per 1 m 3 of building material. On average, per 1 cubic meter. gas blocks have to waste 1 bag of adhesive weighing 25 kg. But this is only from the point of view of theory. Often, waste is 1.5 packs of dry matter, or 37 kg. There are several reasons for this:
Being interested in what kind of glue consumption for aerated concrete blocks is optimal, you should be aware that it will be less when using a fine-grained composition. In this case, the masonry turns out to be thin and as close as possible to the recommended parameters.
Manufacturers of adhesive solutions give various recommendations on what should be the consumption of glue for foam blocks 20 * 30 * 60.
They concern not only breeding, but also the laying of the composition, as well as the formation of block masonry with its help:
The right choice and use of glue for blocks allows you to build a high-quality and durable home, with good thermal insulation properties.
