- Glue composition
- Glue consumption
- Glue storage
- Manufacturers and price
- Main characteristics
- Glue Applying Tool
When choosing adhesive for aerated concrete, you want to know how they differ from each other and whether there are other adhesives. Yes, there are other adhesives (foam, cement mortar) that we wrote about in this article. Well, now specifically about glue, which is very plastic, sets quickly, and also hardens without shrinkage.
Composition of adhesive for aerated concrete
The composition of any cement adhesive for gas blocks includes:
- Portland cement.
- Washed and sifted fine sand.
- Modifiers.
- Polymer additives.
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.
Glue performance characteristics
When choosing an adhesive, you need to pay attention to its performance characteristics, which can vary as follows:
- Exposure time – 10-20 minutes.
- Block adjustment time – 3 -15 minutes.
- Hardening time – 1-4 hours.
- Layer thickness – 1-8 mm
- Operating temperature – from -25°С to +35°С.
It is very important to choose glue according to temperature environment, if the thermometer is below zero, use frost-resistant adhesives. Also try to choose glue with the minimum recommended application thickness.
Advice! To reduce glue consumption, try to prepare small portions, precisely calculated for several gas blocks.
| № | Manufacturer | Glue price for 25 kg (rub) | Consumption (kg) per 1m2 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 they also use:
- Special glue;
- cement-sand mortar;
- polyurethane foam adhesive.
Polyurethane adhesive foam
Adhesive foam for aerated concrete masonry is a fairly new material that has not been tested by time, and that is why it does not inspire confidence in many. In addition, the question of the environmental friendliness of this foam arises. Not all foam is suitable for construction load-bearing walls, although some manufacturers have created such an option.
If we compare the consumption of foam and regular glue, they are approximately equal. It is believed that foam seams are 30% warmer than conventional adhesive ones. In terms of price/consumption ratio it is approximately the same as glue.
Testing glue and foam for aerated concrete
Disadvantages of laying aerated concrete on cement mortar
- Thick seams 8-15 mm;
- High consumption;
- Cold bridges at the seams;
- Mix the solution for a long time;
- Difficulties when laying in cold weather;
Typically, glue calculations are made based on cubic meters of aerated concrete. Manufacturers write that the consumption is about 25 kg of dry mixture 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 mixture.
Such calculations are suitable for gas blocks of any thickness; this is how the total area of the applied surface of the blocks in a cube is calculated.
The glue consumption is greatly 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 different instruments, for example, a trowel paired with a notched trowel, or a notched bucket, or a carriage.
The carriage for aerated concrete is professional tool, which 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. There are carriages various sizes, for different gas blocks.
Storage and use of glue
Adhesive for aerated concrete should be stored in a heated room. high humidity. Add exactly as much water to the dry mixture as written on the package. It is advisable not to add too much cold water, since it will not set well, the water should be warmer than +10. Before applying glue, the blocks must be cleaned of dirt, dust and anything unnecessary. It's quite simple.
The variety of building materials often forces private developers to face difficult choices. This applies not only to the main structural elements, but also auxiliary mixtures and compositions involved in the construction of buildings. In particular, when laying gas silicate blocks, it is allowed to use traditional cement-sand mortar or special glue, which has a sufficient number of advantages, in addition to a higher, at first glance, price. It would seem where the benefits of using modern material, if when buying it you have to pay more than for cement and sand combined? But in the end, the actual consumption of gas silicate glue will be 5-6 times less compared to a conventional solution.
Popularity of gas silicate blocks
The effectiveness of using blocks made of cellular concrete, which include gas silicate products, for laying external walls lies in their structure. During the manufacturing process of the material, numerous separate voids filled with air are formed in it, which helps to obtain lower thermal conductivity values compared to ceramic or silicate bricks.
The size of a gas silicate block significantly exceeds the dimensions of a standard brick. With standard values, their difference is 18 units, which helps speed up the construction of gas silicate boxes. The weight of the load-bearing walls also plays an important role, influencing the bulkiness and depth of the foundation. Weight 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, popularity gas silicate masonry largely consists of visible savings, including reduced costs for heating and foundation construction. The walls do not require additional heat or sound insulation, and they also have fire-resistant properties. And the clear geometric shapes of a single block product make it possible to make fairly thin masonry joints.
It is necessary to note 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, walls made of gas silicate have their drawbacks. And the main one is the need for a device external cladding walls or plastering the surface, since the porous material is afraid of moisture. But for the sake of fairness, it is worth noting that often houses from clay brick they also cover 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, so for load-bearing walls you should use a more dense structure of the material, which has less, but still sufficient, heat-insulating properties. As for everyday situations, it should be noted that the fragility of gas silicate simply does not allow attaching 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 mixture, how to understand the manufacturers and trademarks, how to dilute and apply the composition correctly. But first, you should take a closer look at the material and understand why preference is given to it when laying gas silicate blocks.
As stated above, products made from gas silicate have a porous structure, so they actively absorb moisture, which is found, among other things, in the cement-sand mortar. To prevent the masonry from losing 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 excessive consumption of the solution and deterioration of the thermal insulation qualities of the enclosing structure due to the high thermal conductivity of the cement-sand layer located between the blocks. Glue, unlike mortar, is capable of reliably fastening stones together with a seam thickness of up to 2-5 mm, which relieves the walls of peculiar cold bridges.
The small thickness of the seam between the blocks is possible due to their ideal shape, allowing 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 moisture retention, absence of cracks and glue ductility;
- polymers that improve adhesion (adhesion) and contribute to high-quality filling of irregularities.
Much less glue is consumed per cubic meter of masonry gas silicate blocks than for an identical volume of traditional brick. 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. Just imagine that where only one block needs to be coated with glue, mortar 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 gas silicate glue do not end there. In addition to efficiency and excellent adhesion, we can highlight:
- strength of connections;
- simplicity and speed of kneading;
- speed of hardening;
- water and frost resistance;
- versatility - work with any cellular concrete;
- accessibility and wide choice;
- opportunity 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 formulations can be used at temperatures down to -10 and not higher than +5 degrees. This mode is associated with adding to the dry mixture antifreeze additives, preventing normal adhesion of the adhesive at elevated or low temperatures. Summer adhesive mixtures are recommended to be used in the range from +5 to +25 degrees. Permissible limits are indicated in the manufacturer's instructions located on the packaging.
Dry glue is supplied in 25 kg packs. They must necessarily indicate a deadline for implementation.
Calculation of the amount of 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 purchasing it disappears. The seams 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 material consumption, so before purchasing you should carefully read the manufacturer's instructions.
Preparation of the adhesive composition
Dry glue must be diluted in full accordance with the instructions. It is located with reverse side packaging.
For preparation you will 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 this exact order of laying. The solution is mixed using a special attachment installed in a drill instead of a drill, or using a construction mixer. The mixture should not be whipped, so power tools should be operated at low speeds.
For a short period of time liquid glue let it settle, after which it is stirred again. Consistency ready mixture checked by applying it to the gas silicate surface with a notched trowel. The mass should pass between the teeth easily, leaving clear outlines of 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 mixed in portions. Manufacturers claim an open working time with the solution of 25-30 minutes.
The diluted mixture is placed on the surface of the block using a notched trowel or a special trowel. The new stone is lightly pressed against the previously laid block, after which the element is hammered with a rubber hammer until its final settlement. Correcting the position of the gas silicate block is allowed within 10…15 minutes. The joints are grouted as one row of masonry is installed.
The glue hardens almost within a day, and it acquires its final strength after 72 hours. More exact time must be indicated on the packaging.
Glue selection criteria
The quality of the adhesive composition intended for laying gas silicate blocks largely depends on the product manufacturer. When purchasing, it is recommended to give preference well-known manufacturers with a good reputation, and not to be seduced by low price, indicating a probable fake, and do not be tempted by the promotions of fly-by-night companies that choose low-quality ingredients for the mixture. It is necessary to understand that a quality product cannot have a low cost.
You should pay attention to the storage conditions of the glue in the warehouse or at the point of sale, which do not allow high humidity and low temperatures. If the regime is not followed, the glue will lose its physical and mechanical properties, which ultimately affects the insufficient strength of gas silicate masonry. You should not forget about storage conditions in the case of preliminary purchase of building materials, otherwise glue mixture will have to purchase again.
It is not recommended to choose bulk materials without packaging, since no one can vouch for what is mixed in there and who the manufacturer is. The same applies to containers with a dull, blurred design or unclear inscription, even if it is a trademark. What self-respecting manufacturer would package their product today in an unpresentable package?
Popular adhesive mixtures
The construction market is filled with various dry compositions designed for laying gas silicate blocks. Each region may have its own manufacturer, but the products of large companies are found almost everywhere. The following products are available on domestic shelves:
- AEROSTONE – Dmitrovsky plant of aerated concrete products;
- BONOLIT - Noginsk company "Bonolit - Construction Solutions";
- THERMOCUBE – Kostroma Construction Materials Plant;
- PORITEP - Ryazan cellular concrete plant;
- EKO - 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 – famous Russian manufacturer"Ivsil";
- AEROC - St. Petersburg enterprise for the production of cellular concrete "Aeroc SPb".
The glue of the above brands is distinguished by its 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 adhesive can be used for laying gas silicate or aerated concrete blocks, as well as facing facade bricks or products made of foamed ash silicate or gas silicate. In addition, it can be used to level both vertical and horizontal surfaces.
The main distinctive feature of the glue is its economical consumption. With its help you can make seams with a thickness of 2 mm. It is recommended to use glue at air temperatures not lower than -15°C.
The main components of “Standard” glue are:
- cement;
- purified sand;
- mineral and organic plasticizers from European manufacturers.
In addition to the above-mentioned components, the “Warm” glue includes foam insulation.
Surface preparation
Before using glue for gas silicate blocks, buy b which you can profitably with us, work surface should be prepared. Remove soot old paint, grease and dirt. Smooth out any unevenness with plaster or glue solution. Smooth surface should be sanded sandpaper or abrasive mesh.
How to prepare the solution?
Preparation of the solution consists of several stages:
- pour water into a bucket;
- gradually add the dry mixture in small portions and stir until smooth;
- When the solution reaches the desired consistency, leave it for 5 minutes;
- Stir again and get to work.
The prepared solution will begin to set after 1.5 hours, during which time it must be used.
If the air temperature has reached -15°C, use frost-resistant glue, which contains special additives.
Technical characteristics of Glue for QUICK BLOCK blocks:
| Proportions of water per 1 kg of mixture | 0.21 -0.24 liters |
| Thermal conductivity of the adhesive solution at the age of 28 days: Standard; Warm with perlite | 0.28-0.33; 0.20-0.22 W/(m*°C) |
| Consumption ready solution at: 2mm - 3mm - 4mm masonry layer thickness | 5 – 10 – 15kg per 1m2 |
| Open time for working with solution | 25 minutes |
| Adhesion to concrete | 0.5 MPa |
| Strength at 28 days of age | 15 MPa (M150) |
| Solution preparation temperature | from +5 C to +30 C |
| Base temperature | from -20 C to +25 C |
| Temperature resistance | from -25 C to +35 C |
| Hardening time | 24 hours |
| Grouting joints | in 24 hours |
| Min. mortar layer thickness | 2 mm |
| Maksim. mortar layer thickness | 15 mm |
| Viability of the solution after dilution of the solution | 4 hours |
| Correction after laying the block | at least 10 minutes |
| Frost resistance | 150 cycles |
| Shelf life from the date of manufacture (in intact original packaging) | 6 months |
Advantages
Glue for gas silicate blocks, the prices for which you will be pleased with, has a number of undeniable advantages:
- resistant to moisture and frost;
- high adhesion;
- low thermal conductivity, due to which “cold bridges” do not form;
- economical consumption;
- easy to use.
The position of the blocks during laying can be changed within 10-15 minutes.
Where to buy glue for gas silicate blocks
You can purchase adhesive for laying gas silicate blocks at a favorable price from us. All batches of glue have a quality certificate. You can place an order by contacting the manager by phone.
Distinctive properties of QUICK BLOCK adhesive:
- high adhesiveness,
- high plasticity,
- moisture resistance,
- frost resistance,
- setting time of the solution - 3-4 hours,
— time to correct the block position is 10-15 minutes.
Place of application of glue for gas silicate blocks:
There are only two of them:
- horizontal surface of the already laid bottom row,
- the vertical part of the previous laid block.
When the next row of masonry comes to an end, the need arises for an incomplete (cut from a whole) block. Its size is determined by local measurements. The sawn additional block is coated with glue on both sides and installed in the remaining space for it.
Features of masonry with adhesive for gas silicate blocks:
Only the second row of foam concrete blocks is placed on foam concrete adhesive. The first row must be filled with cement mortar in order to somehow smooth out the remaining unevenness of the base (foundation). 
If you lay foam concrete blocks in one row, then the use of foam concrete adhesive is mandatory for laying them. Moreover, it has the same density as foam concrete. Laying foam concrete and gas silicate parts on ordinary cement mortar having a density of about 2000 kg/sq. cm, you will get so-called “cold bridges” in the form of masonry joints. The consequence will be a general decrease in the thermal conductivity of the wall during operation. Therefore, experts who already use glue for gas silicate and foam concrete in practice claim that more practical option laying blocks - in two rows, 20 cm each.
Harmless tips:
1) Choose solutions that your builders can work with or that you can handle yourself. The more expensive the mixture, the more professionalism is required. You need to be able to apply a good solution thinly (!) (otherwise the glue for gas silicate will cost you a pretty penny, and it is not designed for thick seams: it may crack and burst). And this will require skill, dexterity and a smooth gas silicate or foam concrete block! If any of the above is missing, then use a simple cement-sand mortar. But let's not consider the worst option...
2) It is necessary to place it on glue for gas silicate blocks (this is correct!), but it is not always possible. The reason lies in the lack of specialists who are able to provide a layer of glue of 2-3 mm, with the appropriate quality of the foam block, where geometric dimensions do not deviate by more than 1 mm. The experience of our clients shows that not every qualified mason is able to perform such masonry. Therefore, when hiring a job, immediately stipulate this condition.
3) Highly qualified masons will not offer you masonry with cement mortar.
A few words about saving...
You won't be able to save on the solution. The cement, sand, water plus lime or plasticizer included in its composition, if necessary, are reflected in the total amount of money spent. And if we also take into account the cost of work, the amount will increase at least 2 times.
Ordinary cement mortar will not differ much in density. Glue density - 1400, cement mortar - 1700.
Seam when laying on glue when deflected foam concrete block in geometry per 1 mm is 2-3 mm. If you use a solution, the seams will be 6-8 mm. So consider it.
ORDER OF LAYING GAS SILICATE BLOCKS:
Apply a layer of mortar onto the previously prepared surface using a trowel (smooth grater), and then level it with a notched trowel. The gas silicate block is laid no later than 20 minutes after applying the glue to the surface. The position of the gas silicate block can be adjusted within 10 minutes after installation. Drying time at base and air temperatures from -20 to +25 C is achieved within 1-2 days, and full strength after 3 days.
Adhesive for gas silicate blocks has thermal insulation properties, high adhesion, strength, ductility, is easy to mix and apply, which makes
Before choosing glue for gas silicate blocks, let's figure out what is what. its convenient to use. However, a number of obvious advantages are combined with insufficient glue spread.
Cellular concrete is a whole group of materials with similar properties. In essence, it is foamed concrete, and scientifically, inside the material (concrete) there are evenly distributed pore cells that provide improved physical and mechanical properties of the concrete itself.
Both foam concrete and gas silicate belong to the group of cellular concrete. Only one is activated by gas and then hardened using an autoclave, and the other is activated by a foaming agent and without an autoclave. The difference itself lies in the technology for creating “cellularity”.
Therefore, first you need to decide what you will glue.
Foam concrete blocks are a material for the construction of walls, consisting of cement, sand and foaming agents. It is produced by mineralization of foam or porous solution followed by heat treatment. Mounted both on sand-cement mortar and on special adhesives for foam concrete. Area of application: construction of house walls, partitions, openings in monolithic housing construction.
Unlike aerated concrete, the mixture from which gas silicate blocks (gas blocks) are produced does not include cement or is included, but in very small quantities. This technology is very well developed, so the production of building parts from gas silicate is widely developed in the world. Like aerated concrete, aerated silicate blocks “breathe” like brick or wood. Buildings built from them are easier to heat, since the thermal resistance of aerated concrete (gas silicate) is much higher than that of brick.
Gas silicate is 2-3 times warmer and stronger than foam concrete and has a different geometry. Gas silicate blocks are a building material consisting of sand, foaming agents and a silicate binder component. Are different high vapor permeability, which helps create a comfortable indoor microclimate. Produced using the same technology as foam concrete. Mounted with glue. Area of application: construction of partitions and non-load-bearing walls.
How to prepare glue for gas silicate blocks?
Adhesive for gas silicate blocks mixed with water with a mixer, a special attachment for a drill. The greater the power of the drill, the better the mixture will be mixed. Any water will do, taking into account the consumption: approximately 200 liters per 1 m³ of foam concrete or gas silicate.
So, pour the amount of water indicated on the bag with the dry mixture into the container for preparing the glue (preferably a plastic bucket). While stirring constantly, gradually add the dry mixture. 10-15 minutes after dissolution, stir the solution again. During the work process, stir the solution periodically to maintain its consistency.
Universal recipe for cooking the right glue does not exist for gas silicate blocks. Each brand and each manufacturer has its own. Before purchasing, it is important to remember that the quality of the prepared glue for gas silicate blocks directly depends on the amount of water you add to the solution.
Note!
Finally, you need to remember about external influences that can play an important role in the fate of your construction undertaking. In particular, we're talking about about humidity and air temperature in the room. Thus, a decrease in the air temperature in the room may lead to an increase in the setting time of gas silicate adhesive. And vice versa, heat sharply reduces the setting time. In addition, it is because of it that shrinkage cracks can occur. Very wet areas drying of dry mixtures slows down significantly. And in too dry ones, due to the high drying speed, microcracks that are not visible to the eye may appear. If you don't need an extra headache, monitor the air temperature and humidity in the rooms.
The rapid development of the building materials market allows you to choose from a rich assortment various materials necessary in construction. Since ancient times, when building a house, important factors influencing this process were 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.
Gaining particular popularity among consumers different kinds cellular concrete: foam blocks, gas silicate blocks, foam concrete. First, let's figure out why this material is popular among consumers.
An important factor when choosing cellular concrete is its low thermal conductivity compared to brick. This is possible thanks to its manufacturing technology.
The most common components: sand, water, cement, lime are the 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 brick. 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 a gas silicate block with a density of about 600 kg/m³ will be only 23 kg! These blocks, having convenient size for styling and perfect geometric shape, has greatly supplanted ordinary brick 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 more than pay for themselves.
Features 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 determine what the advantage of this glue is.
When using ordinary cement-sand mortar to connect blocks, the thickness of the seam between the blocks turns out to be too wide - about 15-20 mm. Cement-sand mortar, having weak thermal insulation properties, does not allow maximum heat retention in the room, thereby reducing the use of 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 seam - up to 2 mm. However, it's not just about the thickness of the seam.
Certain additives are used in the adhesive for working with gas silicate blocks, which significantly increase its thermal insulation properties.
The question arises: why can there be such a small thickness of masonry when laying gas silicate blocks, because this is impossible when working with brick. This is primarily due to the shape and size of the blocks used; as mentioned above, the 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 when working with gas silicate blocks:
- Cheap glue. Do the math: the consumption of such glue is much less (six times) than sand-cement mortar, and the cost of the glue is only twice as high;
- Absence of “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;
- Glue durability to influence atmospheric precipitation(rain, frost);
- Strength– compared to use cement-sand mortar the strength of masonry using glue is much higher.
Preparation of adhesive solution
The instructions indicate the ratio of parts of the mixture and water. Prepare the adhesive solution in a regular clean bucket. Following the instructions in the instructions, the mixture is added to the water prepared in a bucket and mixed thoroughly. Mixing is carried out using a drill with a special attachment.
After the first stirring, the solution should settle, then stir again. Having received a homogeneous mass, the solution can be considered ready for use. Since it tends to harden, you should not prepare excessive quantities in advance.
The resulting mixture is applied to the surface of the gas silicate block and leveled using a notched trowel.
Glue selection
When purchasing glue, due to the variety of materials on the market, a logical question arises: which manufacturer should you 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.
Let's look at several noteworthy types of glue for gas silicate blocks.
- Ytong has proven itself to be excellent. The adhesives of this company are indispensable assistants in house construction;
- Taifun Master - adhesive options for laying gas silicate blocks with excellent characteristics;
- ilmax 2200 – great choice when working with gas silicate blocks; allows you to eliminate defects such as unevenness, chips, potholes.
Gas silicate blocks have many advantages over others building materials, however, when using them, there is also a need for “wet” processes when plastering and puttying. Let's look at how to properly apply plaster with a minimum of time and material loss.
Plastering gas silicate blocks
To plaster a gas silicate block, the following tools are required:
- the rule is for “pulling” the solution between the beacons;
- beacon profiles - used when leveling the wall surface;
- grater – used for grouting the applied layer;
- plumb line – used to determine the geometry of walls to be plastered;
- trowel and ladle - needed for throwing mortar onto the wall surface;
- drill and attachment for it (mixer attachment) – 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 solution, notches are made on the surface of the gas silicate block - the contact area increases plaster mortar with a wall.
Using a plumb line, the evenness of the walls is determined.
Typically, plaster compositions are applied with a thickness of within 2 cm, since with a greater thickness they become free-flowing. 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 external work - cement.
The plaster mixture is prepared in plastic container: the dry mixture is poured with water and stirred with a drill until it reaches a creamy consistency.
Plaster is applied to the wall surface with a ladle or trowel. The lifetime of cement mortar for plastering is about 30 minutes, gypsum mortar is 20 minutes. Therefore, the solution is prepared gradually.
Since gas silicate blocks are afraid of water, it is recommended to use special plaster, which should have the following characteristics:
- adhesion to gas silicate block 0.6 MPa;
- strength after 28 days 20 MPa;
- viability not less than 2 hours;
- thickness of the applied layer is 3-6 mm;
- frost resistance 35 cycles;
- consumption with a layer thickness of 1 mm – 1.3-1.5 kg/m²;
- have water-repellent ability.
Walls made of gas silicate blocks need to be prepared for finishing as follows:
- Before plastering, the wall must be cleaned of dust, drips, stains and debris.
- then the surface must be primed with a deep penetration strengthening mixture.
- for plastering gas silicate blocks, reinforcing material must be used fiberglass mesh, which gives strength to the plaster after it dries.
Glue is a mixture of substances that allows materials to reliably adhere to each other. And in order for the seam to be strong and durable, you should use a high-quality product. To secure gas silicate blocks, you need a special glue. This composition usually contains sand, cement, as well as organic and mineral plasticizers.
Currently, a wide range of products are available in the trade for working with gas silicate blocks. The result of selecting such a composition is influenced by the preferences of the master and the conditions of installation work.
Which mixture to choose for laying blocks
To recognize which adhesive for gas silicate is the best, it is worth considering reviews from customers who have already tested the material for own experience. Let us dwell in detail on the brands of glue that have gained the most popularity.
"Zabudova"
This mixture is excellent for installing blocks in winter period. This is possible thanks to the ingredients included in it. There is a special additive that is not exposed to even severe frost (frost-resistant). Most builders respond positively to the product, because it has such advantages as ease of application and simplicity of use. In addition, Zabudova glue is inexpensive, which ensures its position as a leader among all ready-made dry adhesives.
"Prestige"
This mixture is also not afraid of frost. It is used for laying cellular concrete blocks, as well as slabs. A characteristic advantage of the glue is the speed of its preparation. In terms of savings, this composition is slightly inferior to the first one, since its cost is slightly higher.
Bonolit
This composition for a gas silicate block can be used both in summer and winter. Its main advantage is its environmental friendliness. The glue does not contain unwanted impurities and toxins and poses absolutely no danger to human health. Perhaps this affects its cost, because it is more expensive than the previously considered options.
Today this construction composition actively used in laying gas silicate structures. The reputation of the glue is gained by its positive properties:
- Excellent thermal insulation characteristics mixtures make it as similar as possible to cellular concrete. This will allow you to forget forever about frozen walls and heat leakage through joints in the masonry.
- The composition does not lose its properties even in direct contact with water, as well as the influence of very low temperatures.
- The mixed mortar is characterized by excellent plasticity, which makes its use comfortable.
- The mixture is completely environmentally friendly. There is no release of toxic substances, since the product does not contain harmful impurities.
- 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 properties. The composition is widely used in masonry with blocks of cellular material, as well as for cladding thin layer blocks of internal and external surfaces. The result is a seam 1-3 mm thick.
The 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.
High adhesion of the mixture makes it possible to ensure the solidity and high strength of the buildings being erected. The adhesive consists of cement, mineral fillers, as well as organic and polymer modifiers.
"Win"
It is a multi-component dry mixture based on cement, quartz sand and various modifying additives. It is used for laying silicate block structures. The glue is quite suitable for summer and winter work. The material is popular because it is compatible with most Russian-made gas blocks.
The finished solution is highly elastic and easy to use, and does not stick to tools very much. The applied layer is characterized by good moisture resistance. The glue has excellent holding power.
Mixtures of this brand are used for making thick-layer masonry in winter and summer seasons. In addition to laying blocks, they are widely used in installation ceramic tiles, attaching it to the blocks. When applying the composition there is no need to level the surface. You can leave slopes and differences of up to 1.5 cm. Often used for indoor work on leveling block walls.
All presented compositions are safe, endowed with good plasticity and can withstand severe frosts. You will decide which mixture is best when you research them experimentally.
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 tested all their advantages and disadvantages in their work. The selection of glue can be made not only on the basis of personal preferences. It is imperative to take into account the type and conditions of installation work.
How to calculate glue consumption
The dry composition is packaged by the manufacturer in bags weighing 25 kg. The manufacturer did not choose this number by chance, since this is the optimal mass of powder for preparing glue, sufficient for laying one cubic meter of blocks. This is provided that the technology for producing the mixture and its use is not violated.
Let's clearly look at calculating glue consumption using an example:
- Initially, you tentatively determined that for laying all the walls you will need, say, 63 cubic meters of gas silicate blocks.
- With a laying layer thickness of 3 mm, the glue consumption per 1 cubic meter of blocks will be 63 packaging bags.
- If the laying seam is 2 mm thick, then the mass of the required glue will be 5 kg less. In this case, 63 cubic meters will have to be spent
63 x 20 = 1260 kg of dry glue.
Go ahead.
1260 / 25 = 50.4 bags.
Let's round the figure up, the result is 51 bags. - The value derived from the calculations is the smallest amount of dry mixture 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 mortar of cement and sand, and the volume of work is the same, then you will need 2 cubic decimeters of glue. That is, 1 cubic meter of solution is needed to lay 5 cubic meters of blocks.
To prepare a cube of mortar you will need up to 7 packages of cement. The total cost will also increase due to the price of sand and the rental of a concrete mixer. Taking all this into account, it is not difficult to determine how much cement is needed to lay 1 cubic meter of gas silicate: 7 / 5 = 1.4 bags.
Having carried out correct cost calculations, it is easy to verify the low cost of the adhesive composition. Only you can set the remaining priorities.
When constructing 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. Correctly selected adhesive composition and accurate calculation of its consumption is the key to the longevity of erected buildings.
