Glue consumption for aerated concrete blocks estimator. Overview of adhesive mixtures for laying aerated concrete blocks

Houses made of aerated concrete blocks are distinguished by increased heat and sound insulation characteristics, combined with an affordable cost. Their disadvantage is increased hygroscopicity. It can be reduced by laying blocks on special compounds by calculating the consumption of glue for aerated concrete.

Description and characteristics of the material

Blocks can be laid on traditional cement mixtures or special dry compositions from which the mortar is prepared. But preference should be given to the latter. Despite the fact that glue is twice as expensive as cement, it is more economical. But this is not the only advantage.

It consists of the following components:

high grade portland cement- the main binding material;
fine-grained sifted sand;
polymer additives, improving plasticity and contributing to the maximum filling of irregularities;
modification additives, which contribute to the retention of moisture and increase the crack resistance of joints.

Such compositions are used when laying blocks of aerated concrete, foam concrete and other materials with an increased level of moisture absorption. They have high adhesion, moisture and frost resistance and plasticity. The adhesive sets quickly without shrinkage, eliminating the risk of "cold bridges" characteristic of cement mortars. But in order to achieve this effect, you need to make the correct calculation of the adhesive for aerated concrete.

Another positive quality is its simplicity and ease of use. To prepare the solution, it is necessary to mix the dry composition with water in the proportions indicated on the package. For mixing, use a drill with a mixer nozzle or a construction mixer.

Rules for calculating material consumption

Glue is applied to the surface of aerated concrete. The size of the seam should be 1–3 mm. The standard calculations provide for a material thickness of 1 mm. Traditionally, 1.5 to 1.6 kg of dry mix is required for 1 m 2 of aerated concrete blocks. But such a calculation is applicable only when using blocks with a perfectly flat surface.

As practice shows, 37.5 kg of glue or 1.5 bags are spent on 1 m 3. And it's not about cheating the manufacturer. Material consumption depends on several factors:

builder's qualifications;
condition of aerated concrete blocks (presence of defects, etc.);
number of layers;
air temperature.

Adhesive companies place instructions for use on the packaging. Therefore, before proceeding with the work, it must be carefully studied and the mixture prepared, following the manufacturer's recommendations.

How to reduce material consumption

When laying blocks of aerated concrete using special glue, it is necessary to follow the technology. So it will be possible to comply with the cost rate of the dry adhesive composition and prevent its premature drying.

The temperature of the mixture must be at least +5°C. In the process of carrying out the work, it must be periodically stirred, not allowing the components to split. If the construction of the house is planned in the winter, you need to buy anti-frost additives along with the glue. Instead of additives, you can purchase a ready-made mixture, in which they are already included.

The time for applying the finished solution and installing the blocks should not exceed 15 minutes. If there is a need to adjust the masonry, it is done within 3 minutes. The prepared mixture should be completely consumed within 2 hours.

At negative air temperatures, the adhesive sets faster, so the time of its use is also reduced. The dry mixture is kneaded with water, the temperature of which can vary from 40°C to 60°C. It is taken out into the street in a container covered with a lid.

In winter, it is not enough to know how much glue is needed for one cube of aerated concrete. At this time of the year, even experienced craftsmen carefully ensure that the seams are filled as completely as possible, preventing their thickness from increasing. Therefore, it is advisable for novice craftsmen to start building a house from aerated concrete in the warm season.

To minimize material consumption, the adhesive must be applied in a thin layer. As a result, it will be possible to perform an even and durable masonry, achieving stable adhesion and rapid hardening.

Many types of materials are used to build walls. One of them is aerated concrete. When laying it, a special glue for aerated concrete is used. Why not a conventional cement or lime based mortar? Why not polyurethane foam or another composition? What composition to choose for building your own home, how to use it? Today we will try to answer all these questions.

Types of glue for aerated concrete

Glue for aerated concrete blocks is available in several types. The most common are 2 of them:

cement-sand;
special for aerated concrete.

The cement-sand composition is known for working with bricks. Then it began to be used when laying blocks. What is the best adhesive for aerated concrete? Now let's figure it out. A cement-based mortar is not recommended for bonding aerated concrete products for the following reasons:

high consumption with a seam thickness of 10-12 mm;
the solution does not have a constant composition;
its preparation takes a lot of time;
during operation, a large amount of dust is generated;
cold bridges appear at the junctions of individual blocks;
in winter, the solution freezes quickly.

Special adhesive for laying aerated concrete is composed of:

special composition;
cement;
fine sand;
polymer binders;
modifier additives.

Modifiers make the adhesive solution workable at -10°C.

Applying glue when laying

The laying of building material in the form of blocks is carried out quite quickly. This largely depends on the new tool for controlling the thickness of the adhesive laying. It is called a bucket trowel, aerated concrete carriage, a special container. This tool allows you to apply glue with maximum economy, which significantly reduces the cost of construction work. Special glue for gas blocks has several advantages over other compounds:

small seam thickness;
low humidity;
constant composition of glue for aerated concrete;
the presence of antifreeze additives;
the remains of the finished glue are used as putty;
winter products are produced for operation at low temperatures;
the product does not shrink.

The filler has a very fine fraction, due to which a high plasticity of the adhesive is achieved. It allows you to form a layer with a thickness of 2-3 mm. At the same time, the consumption of glue for aerated concrete per 1 m3 decreases by about 4 times, and the degree of thermal insulation of the walls increases. You need only 5.5 liters of water per 1 bag of dry mix (25 kg). This protects the aerated concrete blocks from excessive moisture. The composition of the solution always remains the same, which makes it possible to have identical indicators of gluing the material in all parts of the wall. The adhesive does not freeze at sufficiently low temperatures due to special additives. The remains of the adhesive mixture for aerated concrete can be putty on various surfaces.

It is recommended to store dry mixes in a warm and dry place. When laying aerated concrete blocks should not lie under the snow. Tools for work are best kept in water. A bag weighing 25 kg is enough for 1 cube of building blocks. How to choose the right composition? If possible, test:

Blocks are glued together in pairs with several types of glue. A day later, the gluing site is broken. If the seam remains intact, but the stone collapses, this is the best glue. The fracture occurred along the very seam - the adhesive composition is of very low quality.
Knead 1 kg of each glue and put it in equal containers. Weigh each container after a day. The best glue will have the lightest weight.

The technology of laying aerated concrete blocks on glue is not limited to purely adhesive compositions. In European countries, foam has been used for a long time and very actively for these purposes. The usual dry composition is packed in 25 kg bags. From this amount, you can prepare 18 liters of glue. How much glue is consumed per 1m3? Consumption with a layer thickness of 1-3 mm will be 16-17 kg. It is necessary to take this into account when calculating the consumption of glue per 1 m² or cubic meter. The life of the finished composition is a maximum of 3 hours. You can correct the position of the blocks within 10-15 minutes.

The calculation of glue consumption per cubic meter also depends on the size of the blocks. Usually blocks of 600x300 mm in size are taken. But it is better to make all calculations with some margin. You need to prepare the working mass correctly. It is done like this:

the right amount of water is taken;
water is poured into a container for diluting the dry mixture;
the mixture is gradually poured into the prepared water;
mixing is best done with a mixer for 4-5 minutes;
take a break for 10 minutes;
mix everything again;
periodically mix the finished solution.

A lot of mortar for aerated concrete blocks should not be prepared, as it dries quickly. It is enough to knead such an amount that it takes half an hour to lay a gas block. When can block walls be laid? This largely depends on various factors:

ambient air humidity;
his temperature.

The masonry norm requires work to be carried out in a dry and fairly warm season. The technology of laying aerated concrete blocks provides for this for the optimal drying speed of the glue. It is not recommended to work during rain and snow, use icy blocks for masonry.

Applying glue with a special trowel Applying glue with a spatula Applying glue on blocks with a special carriage

Purchased blocks must be inspected and the defective ones sorted out. In masonry work, only products with a good and clean surface are used. One of the conditions is the permissible level of moisture content of the material. The glue is applied in a thin layer, building material is placed on it, excess adhesive mixture is removed with a trowel or smeared on the wall surface.

Conclusion on the topic

The use of a relatively new material in construction, which is called aerated concrete, is impossible without the use of special glue to hold the blocks together. How much glue is needed per cube of material, how thick should the layer be when laying, what is the total consumption per 1 m3? Here you need to perform an accurate calculation to select and acquire the desired composition. The adhesive composition will need a little more. If it remains, then the costs will not be empty, because you can use it as a putty. On average, one cube of blocks takes a bag of dry mix weighing 25 kg. The mixture comes in white and gray colors.

In winter, you need to choose a winter composition. It contains special antifreeze additives. This gray composition can be glued at any time of the year. About 18 kg of the finished solution comes out of the bag. How much money do you need to spend on the solution? With its economical use, the costs will be relatively small. Conventional mortars based on cement and sand are much more expensive. Therefore, you need to buy mixtures at the rate of one and a half bags per 1 m³. You can make the simplest calculation for 1 m2.

The mixture must be done correctly. For this, it is good to use a construction mixer. The solution is mixed for 5 minutes; 10 minutes is given to him for upholding. After the first minutes of settling, you can use it for its intended purpose. Settling is done so that all the dry components of the mixture are completely dissolved, and excess moisture is removed from the solution.

The technology of laying aerated concrete blocks has a few differences compared to the same process in the case of bricks. The main one is the use of special glue, that is, a laying mixture that fixes the blocks and ensures the strength of the walls. Since special compounds are more expensive, questions arise about what is the consumption of aerated concrete adhesive when laying walls? It is impossible to name a specific and universal figure, since there may be different working conditions, characteristics of adhesive compositions and construction requirements. Nevertheless, the practice of using various mixtures, coupled with the recommendations of technologists and manufacturers, makes it possible to approximate idea of the consumption of masonry material for aerated concrete blocks.

Average glue consumption

Each package with an adhesive composition is labeled with information from the manufacturer. It also contains cost information.. For example, the average indicators may look like this: the consumption is 1.5-1.7 kg of mass per square meter with a layer thickness of 1 mm. It is important to note that these figures should apply only to flat horizontal surfaces. In other words, from 15 to 30 kg is required for 1 m3 of gas blocks. Considering that manufacturers usually produce bags with an adhesive composition weighing 20-30 kg, just one package will go per 1 m3 of masonry.

In terms of calculations, it is important to remember one rule - glue for a gas block, the consumption of which exceeds 30 kg per "cube" of masonry, usually fills cracks with other flaws in blocks. Just to increase the thickness overruns are not allowed.

These are calculations from manufacturers, but there are also real data. As practice shows, on average about 40-45 kilograms are spent per 1 m3. Of course, the differences between officially declared data and practical ones, one way or another, manifest themselves in working with any material. This is the reason for the need to stock up. When preparing for the process of laying gas blocks, it is necessary to take a reserve of 25% of the planned mass. That is, if, according to calculations, it turned out that 25 kg of glue, that is, one bag, is required, then it is desirable to have about 6-7 more kg of masonry mixture in stock.

What causes the difference in consumption figures?

For large workloads the difference between the officially declared expense and the practical one can be quite significant. At the same time, there is no guarantee that the consumption of glue for aerated concrete per 1 m3 will be exactly 30 kg + 10 kg, and not the official 25 or even less. By the way, there are also reverse situations when the final expense is less than planned. In order to draw up a scheme for calculating the mass of glue per 1 m3 as close as possible to the real consumption, it is necessary to take into account the following factors that affect deviations from the average consumption up or down:

Composition characteristics. In the presence of a high ratio of sand or other fillers, as a rule, the flow rate increases. If the bulk of the composition is represented by a binder, then there will be no need for overspending;
Styling technique. The correct laying of the adhesive also affects the consumption. For example, novice stackers make the mistake of spending a lot of composition per block. At the same time, the quality of the result obtained does not increase, but the consumption of the mixture increases;
Reinforcing layer. Often, reinforcing layers are also provided in the walls of the gas block - in this case, the thickness of the adhesive coating also increases and, accordingly, the consumption increases;
Block defects. Even if the standards and masonry technology are observed, there is a risk of overspending. This usually happens when working with defective cellular blocks, when additional layers of paving mass have to be used to ensure an even layer.

Consumption of masonry mixture "Insi-Block"

The plant for the production of autoclaved gas block "Insi-Block" also produces masonry mixtures. The adhesive solution is produced from quartz sand, cement, polymeric additions and mineral additives, due to which strength, processability of processing and moisture retention increase. In order to ensure all the described qualities of the coupling, it is necessary to adhere to the optimal thickness of the laying layer, which is 2-4 mm. Subject to this condition, the consumption of glue for aerated concrete blocks will be about 28 kg per 1 m3. But it is important to consider that this volume is relevant for a minimum allowable thickness of 2 mm. If the laying is carried out on a layer of 4 mm, then, accordingly, the consumption of the dry mix will be increased.

Adhesive for aerated concrete blocks "Insi-Block" is produced in bags of 25 kg, so it is advisable to purchase it with the calculation 2 bags per 1 m3. Regarding water consumption, the manufacturer provides the following data: 0.21 liters per 1 kg of laying composition. In this consistency, the solution can retain its adhesive qualities for 3 hours.

Consumption of masonry mixture "Kreps"

The composition of the brand "Kreps" can be put among the most economical laying aids for aerated concrete blocks. The mass of glue includes cement, as well as fractionated fine sand and modified additives. The average thickness of the "Kreps" solution during the formation of block joints is 2 - 3 mm. Minimum mix thickness minimizes the risk of cold bridging without affecting the quality of the masonry. Provided that the material is laid with the correct geometry, the consumption of glue for aerated concrete per 1 m3 will be no more than 25 kg, that is, one bag of the mixture. If we calculate by area, then 1.6 kg will be enough for 1 m2. Even with a small thickness, the hardened composition will be able to ensure the reliability of the masonry in conditions of frost and mechanical stress.

Consumption of masonry mixture "Real"

Another well-known composition for laying a gas block in the circles of builders is represented on the market by the Real brand. This cement-based loose mix waterproof and frost resistant. However, if laying is carried out in frosty conditions, then it is advisable to add to the adhesive solution and antifreeze additives. The feature of this solution is Possibility of applying a thin layer due to high adhesion and plasticity.

In particular, the thickness may not exceed 3 mm, while providing a modest consumption of the mixture. In this case, the creation of a millimeter layer is also possible, but, of course, in special cases. As a result, a layer of 1 mm consumes no more than 2 kg / m2. Middle the consumption of glue for aerated concrete per 1 m3 is 21–25 kg, making it one of the most economical styling materials in its category. It can be said that thin seams will not provide the proper level of block fixation, but in practice, with such a scheme, not only material is saved, but also bridges of cold are reduced. In addition, the cost of plastering is also reduced. So, conventional solutions involve further application of mixtures in layers of at least 8 mm, and the Real glue line is quite suitable for coatings with a thickness of not more than 5 mm.

During construction using gas blocks, it will be necessary to use compositions intended for masonry. The best option is the adhesive composition. Such glue is a dry mixture that must be diluted with water, which is produced at the construction site. Before purchasing, you should calculate how much glue you need.

In order for the laying of gas and foam blocks to have additional strength, special glue is used.

Among the advantages of using glue for aerated concrete are:

low final cost when compared with traditional material. The use of glue for gas blocks is 2 times cheaper;
the use of glue eliminates the appearance of "cold bridges" that occur when using the solution;
convenience during application, which speeds up the laying process;
reducing the amount of waste;
savings, because the thickness of the seam can be equal to only 2 mm, the consumption of the composition per 1 cu. m blocks will be small. For comparison, when using a mortar, the thickness of the seam should be at least 10 mm.

Calculation of the amount of glue

According to the standards, the consumption of glue should be from 1.5 to 1.6 kg of the mixture in dry form per 1 square meter, while the layer thickness will be 1 mm. Consumption is correct for a flat surface. In other words, the consumption will vary from 15 to 30 kg per 1 cubic meter. m of aerated concrete. On average, it turns out that 1 bag (25 kg) of composition per 1 cube of material will be needed.

When it is known how much mixture is required theoretically, practical experience can also be taken into account. On average, 1 cu. m masonry will be spent 1.5 bags of the mixture. The data obtained in the calculation differ from those obtained in practice, for some reasons. Among the factors, one can single out the qualification of the master, the tool with which the composition is applied to the surface of aerated concrete, the condition of products that can have a flat or defective surface. It is also important how many reinforcing layers were applied, as well as weather conditions. It is worth considering that for 1 cu. m of products will be spent 37.5 kg of the mixture (1.5 bags).

When working with aerated concrete, the formation of cold bridges can be avoided if fine-grained glue is used. Such a composition is able to ensure the uniformity of the masonry.

The smaller the layer of the mixture, the more even the masonry will be and the closer to the standard the amount of mixture used will be. The thin layer of the mortar will ensure the strength of the masonry, which cannot be said about the thick seams obtained using traditional cement mortar.
With the use of glue, it demonstrates flexural and compressive strength, which is due to the cohesive nature of the adhesion of concrete and glue. The given will be true if the composition is prepared correctly. To do this, mixing should be carried out mechanically, involving the use of a mixer or a drill with a nozzle. The water used must be at room temperature. Different manufacturers give different recommendations on the consumption of the adhesive, but they are all about the same. The table (PICTURE 1) shows the calculation of how much AEROC brand adhesive should be used for different block sizes.

Features of using the composition

After you have calculated how much glue is needed per cube of material, it is important to follow the technology for using the mixture in order to avoid a lack of mortar, which can occur due to its setting even before the application to the masonry surface is completed. To do this, it should be noted that the resulting solution must be allowed to stand for 15 minutes, which will allow the special additives to dissolve. After the composition should be re-mixed, and within a minute it will be ready for use. Laying begins at a temperature of the base and mortar of at least +5 degrees. During the work, the solution must be mixed from time to time, which will help maintain a uniform consistency.

The unit must be installed within 15 minutes. The calculation of the adhesive, if the masonry is supposed to be done in winter, will be identical, however, a winter composition containing an antifreeze additive should be used. The winter mixture should be kept warm, and it should be closed with hot water, the temperature of which should vary from +40 to +60 degrees. The glue will not set in advance, and the calculations will remain correct, provided that the mixture is taken to the stage with a lid and in an insulated container. Negative temperatures shorten the time from application of mortar to the block laying process, and the time for subsequent correction of products will also be reduced. Winter laying involves careful control of the thickness of the joints and the completeness of their filling.

The calculation of the consumption of the composition will be correct with the economical use of materials, which cannot be achieved without the use of a special tool, the list of which is given below:

ladles intended for applying the mixture;

saw with carbide teeth;

rubber mallet;

mixer blade;

a square required for cutting at an angle of 90 degrees;

coarse grater with metal teeth;

grater with coarse-grained skin;

glue.

In construction, artificial materials are increasingly being used instead of bricks. When laying, instead of mortar on cement, blocks are used - the consumption is 1 m3 less, the quality is better.

What should be the optimal flow

As part of the binder mixture - cement, fine sand sifted to one-sized fractions and modifiers. Artificial stone is a porous material, so it must be laid on a plastic mixture.

The technology provides for a thin seam, this requires good adhesion. Frost resistance and the ability to resist the penetration of moisture are also inherent in this mixture. It is twice as expensive as cement mortar, but it is consumed 6 times less - the savings are clear.

Manufacturers on the packaging of their products indicate how much glue is used per 1 m². In terms of cubes, the minimum quantity per 1 m³ for some firms is 20 kg. Experts calculate the flow rate of the mixture under conditions of average temperature and humidity indicators. In practice, the composition is required more, because the construction conditions make their own adjustments.

Walls and floors are insulated with aerated concrete blocks. Cement mortar in this case is not suitable - too high thermal conductivity. They use special mixtures, the consumption of which is similar to the same as in the construction of a building.

Consumption in practice exceeds the minimum declared by the manufacturer by 1.5 times.

The optimal value is considered to be 25-30 kg. If this indicator is very different from the one declared by the manufacturer, it means that errors have been made in the technology.

When building facilities with a large cubic capacity, there may be an overrun or, conversely, savings. Many factors play their role: the quality of gas blocks, the thickness of the layer, the experience of the bricklayer.

Manufacturers calculate the consumption, taking the thickness of the glue line 1 mm.

It is optimal for the following reasons:

cold bridges are not formed, heat losses are excluded;
effectively emphasizes the evenness of the masonry;
a thin layer is stronger than a thick one.

You should not be afraid of overspending due to the fact that a lot of the mixture has been prepared, it will harden from untimely use. The properties of the binder composition for gas blocks in this respect are different from those of other similar mixtures. Plasticity is maintained for a long time if the glue is periodically mixed.

Average consumption of glue per 1 m3

The manufacturer, in addition to technical specifications, on the packages indicates the consumption of glue in kg per 1 m². To the user, such information will tell little about anything. It is necessary to know the dimensions of gas blocks and make calculations for 1 cubic meter. m.

The weight of the package is 20-30 kg, the average consumption indicated by the manufacturers is 1.5-1.7 kg per 1 m². When translated into cubes, this means that you need 1 bag of dry mix 25 kg.

It should be borne in mind that the indicators are valid if the surface of the blocks is even, the porosity is insignificant. Taking into account the realities, which are not always the most favorable, they buy with a margin of about 6 kg.

How much solution is needed in reality, it is impossible to say. An important role is played by the conditions, individual for each case.

What determines the difference in consumption figures

Even for experienced masons, it happens that the actual costs of glue exceed the planned ones by 1.5-2 times. The difference in quantity arises as a result of construction features.

An estimate as close as possible to a reliable one is possible, taking into account the conditions affecting the masonry, these are:

Component ratio included in the mixture. If it contains an increased percentage of sand and various additives, consumption increases. With a large percentage of adhesives, the declared consumption corresponds to the actual one.
Technological process. Manufacturers' calculations are based on technology compliance. It is difficult for builders without sufficient experience to maintain the correct line when laying. For alignment, they increase the thickness of the seam for each block, using more glue.
Layer reinforcement in houses with 2 and above floors. It will take more mortar to close the reinforcing mesh, which is laid between the blocks. Only then will the connection of gas silicate and other similar blocks to each other be strong.
building products low quality, with surface defects. Overspending cannot be avoided - part of the adhesive goes into the pores, fills chips, cracks. It is necessary to align the masonry joints, compensating for irregular shapes of the material.

In addition, the conditions in which construction takes place lead to an overspending of glue. Deviations from the optimal temperature and humidity in one direction or the other make adjustments.

The role of the tool used by the bricklayer is important. It is recommended to use a special bucket trowel, which provides a uniform thickness of the seam and saves glue.

You can find out the average consumption declared by the manufacturer on the back of the package.

Consumption of masonry mixture

In order for the amount of adhesive mixture to be enough for construction, the following indicators are taken into account in the calculation:

standard costs - 1.4 kg / m²;
block dimensions;
joint thickness (in mm);
consumption per 1 m³ (average - 25 kg).

Take into account material defects, reinforcement - you will need more glue.

insi block

The dry mix contains, in addition to standard components, mineral impurities. They increase grip and durability. For high-quality masonry, the adhesive layer should be 2-4 mm.

The manufacturer calculates consumption, provided that the seam is 2 mm thick. Then 2 bags of loose mixture of 25 kg each will go per 1 m³. Increasing the thickness results in more mixture consumption.

1 bag of glue is mixed in 5 liters of water or a little more. With this ratio, the prepared solution retains plasticity, adhesiveness for 3 hours.

Kreps

The composition of different mixtures varies slightly. Manufacturers are constantly looking for optimal proportions, modifiers, additives that allow you to create an effective glue. Kreps, in addition to mandatory strength, adhesion, is distinguished by economical consumption.

If the technology is followed, the corners, sidewalls, block bases are even, without large pores, 25 kg is enough for 1 m³ - 1 bag. The recommended thickness of the seams is 2-3 mm.

The advantages of this mixture include frost resistance, the ability to withstand temperature fluctuations, high humidity.

Real

The mixture is in demand due to its cost-effectiveness. The manufacturer claims that high-quality masonry, strength will provide an adhesive layer of 1 mm. Under such conditions, the consumption of glue does not exceed 1 pack of 25 kg per 1 m³.

The walls need to be plastered, but the layer from the required 8 mm can be reduced to 5 mm. This is achieved due to the fact that the minimally thin seam between the blocks does not allow the appearance of cold bridges.

Glue quality is average. When work is carried out in winter conditions, it is necessary to add frost-resistant additives.