Review of adhesive mixtures for laying aerated concrete blocks. Which adhesive to choose for aerated concrete, review of manufacturers Composition of adhesive for laying aerated concrete blocks

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

Adhesive for gas silicate blocks has a number of advantages: it is flexible, can withstand low temperatures, and repels moisture.

Properties and technology of use

When finished, masonry adhesive looks like a viscous, monotonous mass. Its base is cement. Various additives give it plastic properties, retain moisture and push out small air bubbles from the mixture. Thanks to its constituent components, the adhesive protects.

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

For thorough mixing, you must use a construction mixer.

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

Manufacturers produce glue for gas silicate blocks:

• ordinary;
• frost-resistant.

For operation at low temperatures (-5-15°C) purchased ready-made composition with resistant to low temperatures additives or a special component is added to the regular one.

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To dilute the adhesive mixture, you will need 2-2.4 liters of any water per 10 kg of dry mass.

Water is poured into the container, then the measured amount is poured out. Mix using a construction mixer (drill with a special attachment).

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

A prerequisite for a high-quality adhesive mixture is adding dry components to water, and not vice versa.

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

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Laying technology

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

You can use a notched trowel or trowel to apply the glue.

The first row of blocks is laid on the foundation, which is held together with traditional cement mortar. This must be done to level the initial row; the thickness of the seam between the bricks can fluctuate and reach several cm.

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

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

Within 15 minutes, use a rubber hammer to level the masonry. Excess solution is removed.

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

Not only a mason, but also a non-professional with with skillful hands. To do this, it is enough to carefully follow the technology of laying gas silicate blocks.

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Pros and cons of glue

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

Easy to dilute, consists of only two components for mixing - water and dry mixture. Does not require large containers for preparation, for example, a concrete mixer. Less time and labor is required to prepare the adhesive composition.

There is no need to store large quantities of components - sand and cement. Economical - seam thickness is 3 mm. Due to additives it is plastic, non-flammable material, does not create conditions for mold to appear.

Used when laying down to -5°C, frost-resistant mixtures - up to -15°C. Possibility of leveling masonry within 10-15 minutes. The thin seam provides excellent thermal insulation. Dry construction mixture is stored for a long time.

Can be used for gluing various surfaces. Simply apply and remove excess. When diluted, it allows you to avoid debris and dirt, which is convenient for erecting partitions and remodeling walls in an apartment.

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

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

Glue is purchased based on the following calculation: for a solution layer thickness of 2 mm, 3 kg of dry mixture is required for every 1 m².

The consumption of the adhesive composition depends on:

• stacker experience;
• quality of installation;
• the quality of the blocks themselves (how smooth the surface is formed).

As practice has shown recent years, use of dry building mixtures during most construction and repair work much more profitable than using a conventional solution. So, with the help of adhesive for foam concrete, you can not only complete the masonry much faster and better than before, but also save money. After all, glue consumption is gas silicate blocks several times less than conventional mortar.

The Osnova company offers adhesive for gas silicate blocks own production in a wide range. The use of modern equipment and advanced technologies allows us to produce world-class products that have passed all the necessary tests and have the appropriate certificates.

At the same time, we offer to buy high-quality adhesive for foam concrete, the price of which is noticeably lower than the market average.

Advantages of using glue for gas silicate (aerated concrete) blocks

Using special adhesive for foam concrete is almost always more profitable than using regular adhesive cement-sand mixture, the following reasons:

• the glue has better adhesion, which increases the strength of the structure;
• it is simple and convenient to work with;
• adhesive for foam concrete is different optimal time grasping;
• has high frost resistance and moisture resistance;
• glue consumption for gas silicate blocks is several times less than cement mortar;
• the glue is resistant to temperature fluctuations and tolerates both high and low temperatures equally well;
• the level of thermal insulation of the building increases.

Calculation of glue consumption for aerated concrete blocks

Before starting work, it is advisable to calculate the amount necessary materials to estimate the approximate cost of construction. Having a house plan, it is easy to determine how many blocks you will need, since their geometric dimensions are well known. But how can you calculate the glue consumption for gas silicate blocks in this case?

In fact, everything here is quite simple. Glue consumption, as a rule, is 15-20 kg per cubic meter of masonry, if the thickness of the adhesive layer is the recommended 2 mm. Therefore, knowing the number of cubic meters of block required for construction, it is not difficult to calculate how much glue for foam concrete you need to purchase.

In works on exterior decoration buildings are increasingly using blocks based modern materials- gas silicate. They are high quality, reliable, look great and ultimately are not prohibitively expensive. For their fastening, an adhesive composition is used that meets all work and safety standards.

The slabs retain heat well due to their structure, so in order to preserve this property, you need to decide how to choose adhesive for gas silicate blocks, taking into account the fact that a regular solution will not work.

Glue Features

The adhesive composition, intended for the work process with gas silicate blocks, contains Portland cement, quartz sand of the finest structure, mineral additives, and plasticizers.

Thanks to these components, good water and heat retention, low thickness of the adhesive layer (from 2 to 4 mm) and excellent interblock adhesive strength are ensured.

Features of special glue:

· resistance to high temperatures, as well as low, high humidity;

· hardening in a matter of minutes;

· economical: the use of the composition justifies the cost spent several times;

·high strength;

· easy preparation from a semi-finished state.

Compared to compositions made from cement and sand, the layer thickness of the sample under consideration provides an undeniable advantage.

In the first case, it reaches at least 15 mm due to the loss of strength at a lower value. The hygroscopicity of blocks when using special glue does not affect the reliability of fastening even with a thickness of 2 mm.

Main selection criteria

In order not to check the quality of the special adhesive composition for gas blocks already during the work, you should familiarize yourself with the main criteria that every buyer should focus on:

1) The manufacturer must be well-known, recommended by specialists, with well-established technology for the production of formulations.

2) Improper storage of the mixture (humidity or cold) worsens the properties and leads to insufficient strength during masonry.

3) If the price is excessively low, you should think about the likelihood of counterfeiting or inadequate quality;

4) The date of manufacture must correspond to the sale of the goods; otherwise, you cannot count on the desired results.

The packaging details the steps to proper preparation solution, as well as operating conditions and approximate drying time.

It should also be noted that in certain situations the addition of antifreeze components is required.

Main manufacturers

When wondering which adhesive to choose for gas silicate blocks, it is worth taking into account the opinions of both amateurs and professionals, given the fact that the range offered on the construction market is very wide.

Domestic and foreign manufacturers are increasing their model series adhesives.

The most important companies include the following:

· "Bonolit" and "Volma";

"Ytong" and "AeroStone";

· "Prestige" and "Glue Zabudov";

"Ceresit" and "Knauf";

"Azolit";

The most expensive and the cheapest

When considering the price category of adhesive mixtures, it is immediately worth noting that you should beware of a very low cost per package.

The reason for this is that a manufacturer will never set a low price for good fastening properties. It is also worth being reasonable about the differences between domestic and import brands. No doubt many people understand what they are.

Among Russian adhesives there are good options, in total varying from 130 to 200 rubles. per package of 25 kg. These are “Zabudov’s Glue”, “Prestige” and “TM-17 will win”. They are distinguished by decent performance in terms of ease of application and the absence of harmful impurities.

The most expensive ones include the domestic "Bonolit" and the German brands Ceresit and Knauf. Their price threshold starts from 250 rubles. per bag 25 or 30 kg. They have excellent adhesion, low mixture consumption, and increase the thermal insulation properties of the blocks.

Manufacturers of these brands produce different variants mixtures that differ in weight category and joint thickness.

Winter glue options are the highest in price - AeroStone and Ytong. Application in frost conditions of - 10 degrees Celsius. The cost in this case depends on the quality of the antifreeze additives present in the mixture. It is also worth considering price category winter adhesives higher than summer counterparts. The same applies to the consumption of the substance: per 1 cubic meter. 25 kg are spent.

The most popular among the people

Based on consumer opinion, you can find out which adhesive to choose for gas silicate blocks, with the greatest correspondence between quality and price.

According to market demand statistics, the German Ceresit model “CT 21” wins.

The preference of buyers is quite justified: the company claims the quality corresponds to its cost.

The adhesive consists of cement with polymer modifiers, as well as mineral additives. Excellent for outdoor and interior work laying gas silicate blocks. All seams with a minimum thickness of 2 mm, which increases uniformity.

Type of mixture: paper packaging, weight 25 kg. The glue has a shelf life of one year from the date of manufacture when unopened.

Ceresit CT 21 will cause absolutely no harm: environmentally friendly pure substance. It is applied evenly and easily, is resistant to low temperatures, does not lose its properties when exposed to excessive humidity, “cold bridges” do not arise when using it, and has high adhesion to the material. The numerical value of the mixture consumption is 5 kg per 1 sq.m. Properties last up to 4 hours. Estimated cost – 280 rubles.

The manufacturer guarantees long term service and no complaints from the consumer.

Glue is a mixture of elements, thanks to which it is possible to achieve tenacity with various materials. But for the durability of the resulting seam, you should focus on a quality product, especially if you have to glue gas silicate blocks. Such glue can be obtained from sand, cement, plasticizers of organic and mineral origin. Today on the construction market for gluing gas silicate blocks there is a large number of compositions, the choice of which depends on the preferences of the owner, as well as the conditions for laying the material. Let's consider which options are best to choose in terms of price/quality ratio.

Frost-resistant for laying blocks in winter

When determining the the best glue for gas silicate blocks, it is necessary to take into account reviews from consumers who have already been able to evaluate the quality of the products from their own experience. Let's consider the most popular and high-quality brands of masonry adhesive in winter.

Zabudova

This composition is perfect for laying blocks in winter time. The reason is in the components that make up it. There is a special additive that is not affected even by severe frost (frost-resistant). Many builders speak positively about this product, because the glue is characterized by such advantages as ease of application and ease of use. In addition, the cost of Zabudov is not high, which allows the adhesive composition to occupy a leading position in the market of ready-made dry mixes. The cost of production is 120 rubles per bag.

Prestige

This composition is also not afraid of frost. It can be used for laying cellular blocks and even slabs. Characteristic feature glue remains it quick cooking. The cost of the composition is slightly higher than that of the first option. For a 25 kg bag you will pay an average of 140 rubles. You can find out which foam glue to use for the ceiling from the article.

Bonolite

This adhesive for aerated concrete blocks can also be used in winter. The main advantage of the mixture is its environmental friendliness. The glue contains no harmful impurities or toxins. It is completely safe for human health. But its cost is higher than the previously described options. You will have to pay 180 rubles for the bag. can be used in construction from the article by following the link.

Eunice Uniblock

Uniblock glue is now actively used for laying gas silicate blocks. The reason for this popularity is due to the set positive qualities, which include the following:

AEROC glue

These products are characterized by high strength characteristics. Glue is actively used for laying blocks of cellular concrete when providing thin-layer laying of external and external walls. The thickness of the resulting layer is 1-3 mm.

The high popularity of the product is due to its following characteristics:

• there is no formation of “cold bridges”;
• not affected by moisture;
• severe frosts are not scary;
• It is allowed to use the prepared solution within 2 hours, as it will not harden;
• vapor permeable.

Due to high adhesion, it is possible to achieve solidity and high strength characteristics of the building being constructed. The adhesive contains the following components: cement, mineral fillers, modifiers of organic and polymer origin. The cost of a bag is 250 rubles.

This composition is presented in the form of a multicomponent dry mixture, which is based on cement, quartz sand and various modifying additives. Glue is used for laying gas silicate blocks. You can purchase the mixture for work in summer or winter. This product is also very popular, because it is suitable for most gas blocks produced in Russia. After preparing the composition, it is characterized by high plasticity and manufacturability. It does not stick strongly to the instrument, and after application it forms a good moisture-resistant layer. The glue is characterized by high fixing ability. The cost of the product is 190 rubles per bag.

EK Chemicals190

Purchasing this mixture involves its use for thick-layer laying of gas silicate blocks not only in winter, but also in summer. In addition to laying blocks, it is actively used in the installation of tiles, sides and slabs, as well as other highly porous materials with further coating. When using this glue, it is not necessary to level the surface. Changes and slopes can reach up to 15 mm. Can be used inside the house to level walls built from the sides. The product costs 190 rubles.

Which gas silicate glue is better to choose?

There is no clear answer to this question. The reason is that the best adhesive compositions were presented above, according to the reviews of many people who have experienced all their pros and cons. The choice of adhesive composition should be made not only taking into account personal wishes. Here it is important to take into account the type of work and the conditions for laying the block.

Each of the available products has a safe composition, high plasticity, and can be used in severe frosts. Today, the best adhesive compositions are the products listed above, and only you can choose which is the best when you do your research when working with them. Some prefer to use it for installation.

The video explains which glue to choose for gas silicate blocks:

Flow calculation technology

If all the rules for producing the mixture and applying it to the blocks have been followed, then its consumption can be carried out in the following ways: glue is sold in bags weighing 25 kg. This value was not chosen by chance by the manufacturer, because the weight of dry glue is optimal for laying 1 m3 of blocks. Thanks to this, the consumption of the composition will be very easy to carry out. Let's look at this in more detail using an example:

1. After you have calculated everything, it turns out that to lay the walls and partitions you will need, say, 63 m3 of aerated concrete.
2. If the thickness of the laying layer is 3 mm, then the consumption of the adhesive composition per 1 m3 of blocks will be 63 bags.
3. When the thickness of the seam between the laying blocks is 2 mm, the amount of glue consumed will decrease by 5 kg. Then for 63 m3 you will have to spend 20x63 = 1260 kg of mixture. Next, 1260/25= 50, 4 bags. Round up to greater value and we get 51 bags of glue.
4. The obtained value is the smallest amount of glue that needs to be spent to erect a building, the construction of which involves the use of 63 m3 of aerated concrete. When the price is known, you can simply find out the cost of the adhesive solution.

In the video - winter glue for gas silicate blocks:

If you use a cement-sand mortar for installation for such a volume of work, then here you will need 2 dm 3 of glue. Thus, 1 cube of the mixture will be used to lay 4 cubes of blocks. To prepare a cube of mortar, you will need 7 bags of cement. The price will also have to include the price of sand, purchase or rental of a concrete mixer. Taking all this into account, you can obtain the amount of mixture required to lay 1 m3 of aerated concrete: 7/5 = 1.4 bags.

Construction modern houses Most often it is carried out from gas silicate blocks. For a strong grip, it is very important to choose a quality adhesive composition and accurately calculate its consumption. Thus, you can save money if you buy glue in larger quantities. The constructed structure, if all conditions are met, will serve you for a long time without the formation of certain defects.

The wall material must provide the structure being built with reliable performance characteristics. A guarantee of high-quality masonry from aerated concrete blocks is possible if special adhesive mixtures are used.

Adhesive for laying aerated concrete blocks is a dry concentrate, which includes the following components:

• high-grade Portland cement as a binding material;
• fine sifted sand;
• polymer additives to improve ductility, maximize filling of all irregularities and increase adhesive ability;
• modification additives for retaining internal moisture, protecting joints from cracking when laying aerated concrete.

Similar mixtures are used for gas blocks and other masonry materials (for example, foam blocks, as described in) that have a high level of water absorption, as well as where it is necessary to level the surface and putty.

Aerated concrete masonry cement-sand mortar differs from adhesive in the following advantageous features of the latter:

• minimum layer thickness not exceeding 2–3 mm;
• good ductility;
• increased adhesion;
• resistance to moisture and frost;
• ability to harden without shrinkage;
• improved thermal insulation of the building due to reduced heat loss through the seams and the absence of “cold bridges”;
• beautiful, even laying of gas blocks, thanks to the minimum layer thickness;
• high setting speed;
• budget cost with economical consumption, that is, despite the fact that the glue is twice as expensive, its consumption is 5 times less;
• ease of use and ease of use;
• increased structural strength due to minimum thickness seams that ensure the solidity of the structure;
• low water consumption, since for 25 kg of concentrate the water consumption is 5.5 liters.

Adhesive for aerated concrete blocks also helps reduce moisture, as it has the ability to draw it into itself. Water-retaining ingredients eliminate mold growth between aerated blocks and increase their positive properties. And special anti-frost additives allow masonry to be carried out in the winter season.

There are seasonal varieties of the mixture that differ from each other in color: gray and white, that is, they are divided into winter and summer glue, respectively. The white color is explained by the presence of the same Portland cement in the composition, which makes the use of aerated blocks attractive for interior work. Gray is considered winter, but it can be purchased regardless of the season, even in summer. The presence of anti-frost additives allows it to be used when the outside air temperature reaches -10 °C, but not lower.

When using winter composition, you must adhere to the following rules:

• store bags in a heated room;
• dilute in warm rooms water with a temperature of more than 20°C;
• the temperature of the finished solution suitable for use should not be less than 10°C;
• in winter conditions, it is important to protect aerated concrete masonry with tarpaulins so that freezing of moisture does not deteriorate the glue;
• Use the finished mixture within half an hour;
• when constructing walls in winter, it is especially necessary to control the flow rate to ensure the completeness of filling and the thickness of the joints;
• lay dry blocks.

For uniform hardening of the adhesive great importance has a properly prepared composition, and its normalized consumption, and compliance with technology, and taking into account external factors, namely:

• aerated blocks are laid at normal humidity environment no precipitation for 15 minutes, and corrected for about 3;
• high temperature increases the setting speed, in winter period glue hardens more slowly;
• It is not recommended to moisten them before laying the blocks;
• applied with a special spatula.

Compliance with the above rules helps prevent premature setting.

The adhesive composition is applied only to the surface of aerated concrete blocks, cleared of debris, ice, and snow.

The solution is prepared as follows:

• The required consumption of dry mixture and water, indicated on the packaging, is measured into the container. But, as a rule, to prepare a homogeneous mass, add 220–250 mg to 1 kg clean water, minimum temperature which is allowed within 15–18 °C, and the maximum is 60 °C.
• Everything is thoroughly whipped until a homogeneous consistency is obtained by hand or with a drill with an attachment.
• After this, let it sit for about 5-10 minutes and stir again.

The solution can be used for about 3–4 hours, so it is kneaded in small portions. And they begin to coat it with it from the 2nd row, since to level the surface after the foundation, blocks of aerated concrete are immediately placed on a cement-sand mortar.

Throughout the entire work, the glue is stirred periodically; adding water to the finished composition is not allowed.

The consumption of dry concentrate per 1 m3 of gas blocks with a joint thickness of 1–3 mm is about 16 kg. But the specific amount depends on many factors, including:

• geometric dimensions of the block;
• surface defects;
• weather conditions;
• the tool used for laying aerated concrete;
• presence of reinforcement;
• homogeneity, temperature and concentration of the composition;
• bricklayer qualifications.

The relatively accurate glue consumption is determined by the formula: S = [(l+h)/l*h]*b*1.4, where:

• S – mixture consumption in kg per cubic meter of gas blocks;
• l, h – length and height of the block in m;
• b – seam thickness in mm;
• 1,4 – conditional meaning dry mixture consumption in kg/m2 for a layer 1 mm thick.

Cost of glue concentrate

Today you can buy such products in almost every hardware store.

The solidity of the aerated block structure, the strength and service life of the structure being erected depend on the adhesive mixture, its composition, and the quality of preparation.