How to preserve glue for gas silicate blocks. Choosing adhesive for the walls of your future home. Calculation of glue consumption for aerated concrete blocks

Glue for gas silicate blocks is a dry cement-sand powder with the addition of organic and mineral plasticizers. Available, as a rule, in packages of 25 kg. Used in the construction of external and internal walls.

The glue has many advantages:

• High heat-saving properties. Its use minimizes the risk of “cold bridges”.
• Strength, which is significantly higher than that of a cement-sand mixture.
• Resistant to weathering.
• Plasticity.
• The ability to create a thin seam, increasing the quality and appearance masonry
• Easy to mix.
• Financial benefit. Price cement mixture 2-3 times lower, but its costs are almost 6 times higher.

The glue contains special additives that prevent rapid drying. This allows you to tightly connect adjacent blocks, and the coupling will not lose strength for long years. The setting period of the solution is 3-4 hours, and the time during which the position of the block can be corrected is 10-15 minutes.

Adhesive for gas silicate blocks: features of choice

When choosing an adhesive composition for gas silicate, you need to pay attention to several factors:

• Best before date. “Expired” or improperly stored gas silicate glue loses most of its fastening properties.
• Manufacturer. You should not chase low cost and buy glue from little-known companies. It is better not to risk the reliability of your home and buy a product from a well-established manufacturer.
• Weather. If the laying of gas silicate blocks occurs at temperatures below +5 °C, then frost-resistant compounds are used.
• Consumption. Before buying gas silicate glue, you need to check its consumption per 1 m3. On average, about 6 liters of water are required to knead 25 kg. In this case, the weight of the finished solution from 1 bag will be 30-31 kg. The total consumption of glue is influenced by several factors (layer thickness, characteristics, manufacturer), but on average it is 15-40 kg per 1 cubic meter of masonry.
• Scope of work. A preliminary calculation will help you avoid making mistakes when purchasing and sometimes save significant money. Large quantities are usually sold at a significant discount, which will have a positive impact on overall construction costs.

Glue consumption directly depends on the quality of gas silicate blocks. If you use a material with ideal flat surface, then 1 cubic meter of masonry will require approximately 20 kg of mixture (with a 2 mm joint thickness). If the blocks have shape defects, then you will have to spend more glue. Experts advise purchasing the mixture with some reserve.

The most common brands of glue

Many domestic and foreign companies produce glue for gas silicate. Depending on the quality of the additives, there are winter and summer species. Frost-resistant adhesive is recommended for use at low temperatures (from +5 to -10 °C). Packages have standard weight(25 kg), but decorated with a special logo (snowflake).

Experienced craftsmen offer several compositions that have proven themselves well in the construction market.

As you can see, the price of a good gas silicate glue cannot be too low. Attempts to save money threaten future problems with the quality of the masonry.

Preparation of glue

When preparing a mixture for laying gas silicate blocks, several rules should be taken into account:

• The container for diluting glue must be clean, durable and dry. An ordinary plastic bucket may be a good option.
• During the mixing process, the mixture is added to the liquid (in no case vice versa).
• You need to pour the solution in small portions.
• For work, it is better to use a drill with a special attachment (mixer).

The thickness of the finished glue should resemble sour cream. It can be used at any time of the year, but it is better if the temperature is above -15°C.

The glue is prepared in two “passes” with a 5-7 minute interval. For 1 kg of mixture it takes approximately 200 g of water (the exact proportions should be indicated on the packaging). An overdose of liquid threatens to deteriorate the adhesive characteristics. In this case, the consumption of the finished gas silicate glue will be at least 10 kg per 1 m3. Do not dilute too much solution at one time. The resulting glue does not lose its properties for 80-120 minutes (in winter - within half an hour), after which it hardens and becomes unsuitable for installing gas silicate blocks.

Features of block masonry

The work surface needs preliminary preparation. Firstly, it needs to be cleaned of foreign objects and debris, remove any remaining paint, oil, dust and soot. Secondly, it must be strong and dry. If the surface has glossy look, then you should sand it to a matte state. Smooth out irregularities and depressions (you can use already prepared glue).

Work instructions

After preparing the surface, you can begin installing the walls. To apply gas silicate glue, a smooth trowel is used, and for leveling, a notched trowel is used. The mixture must be applied both to the bottom row of the masonry and to the side of the block being installed.

Between applying the solution and further work It should take about 20 minutes. New block you need to press lightly to the base and settle rubber mallet. The mixture will begin to harden in about 10 minutes, during which time any possible unevenness in the masonry can be corrected. In the warm season, the glue dries in 1-2 days, and reaches its final strength after 3 days.

The air temperature in the room has a significant influence on the speed and quality of hardening. When it gets colder, the adhesive setting time increases; when it gets warmer, it decreases. Too much heat may cause shrinkage cracks.

1. When choosing a mixture, it is better to choose options that even a novice mason can handle (for example, Etalon-Teplit glue or SM 999). Expensive solutions require more professionalism.

2. The second and subsequent rows of blocks are “set” on the glue. Installation of the first tier occurs only with cement mortar. This helps smooth out possible unevenness in the foundation and improve the quality of the masonry.

3. The mixture must be applied thin layer(2-3 mm). Otherwise, material consumption will increase several times, which will negatively affect both the quality of the seams and the overall construction budget.

At first glance, laying blocks with gas silicate glue is a simple procedure. This is not entirely true: correct use Not every craftsman can use an adhesive composition. In this regard, it is advisable that the installation process is carried out only by a qualified mason who can guarantee high quality masonry.

For laying gas silicate blocks, special glue or regular glue can be used. building mixture. According to experts, it is best to use glue for the construction of external walls.

For laying gas silicate blocks, it is best to use special glue.

Application for masonry special glue has the following advantages:

Glue for gas silicate blocks allows you to connect elements with a masonry joint thickness (2-10 mm).

• cement-sand mortar is much more expensive than glue. The consumption of adhesive is six times less, and its price is only two to three times more;
• the use of fine-grained glue completely eliminates the appearance of “cold bridges” (a layer of material with high thermal conductivity, which leads to a significant decrease in the uniformity of the entire masonry and a significant increase in heat loss);
• Using glue, you can lay walls made of aerated concrete, gas silicate blocks, shaped bricks and other foam silicate elements. The adhesive composition makes it possible to connect masonry elements with a masonry joint thickness (2-10 mm). It can be used to level horizontal and vertical surfaces, and the layer thickness can reach 5 mm;
• the adhesive composition for has excellent thermal insulation properties, high adhesion, good strength, excellent ductility;
• if necessary, after laying the gas silicate block, it is allowed to correct its position within 10-15 minutes;
• The glue is quite easy to prepare and apply, which makes this material very convenient to use.

Adhesive composition

Glue for gas silicate blocks is a dry adhesive mixture of cement with small additives and fillers in the form of water-retaining, plasticizing, air-repellent substances. These additives help increase the strength, frost resistance, water resistance and other parameters of the glue.

Why is adhesive for a gas silicate block better than a solution of cement and sand?

All elements that make up the adhesive for blocks have increased strength, frost resistance and water resistance.

There are opposing opinions among builders. Some claim that it is absolutely not difficult to lay blocks with glue, while others claim the opposite: in order to lay blocks with glue, competent masons are needed. The situation is further complicated by the fact that there are regions for which it is absolutely not common and in which it will be quite problematic to find specialists to perform such work. But, according to experts, even a non-professional can lay blocks. To do this, you just need to carefully study the topic of execution construction work using gas silicate and foam concrete blocks, and then strictly follow the instructions you have studied.

A distinctive feature of the adhesive mixture for gas silicate and foam concrete blocks is the presence of a special additive that prevents the blocks from quickly absorbing moisture from the adhesive mixture. This additive retains moisture in the adhesive solution, which allows you to reliably glue gas silicate blocks.

Glue selection

Of course, it is most reliable to purchase glue from the direct manufacturer of the blocks. But very often its cost is unreasonably high. As a rule, the price tags for such goods are increased several times.

Experts say that any glue that is intended for outdoor work can be suitable for building a private house using gas silicate blocks.

Preparing the mixture

In order to prepare the glue, you need to add the dry mixture to a construction bucket with a small amount of water, while stirring constantly. After 7-10 minutes, stir again.

Dry adhesive mixture for gas silicate and foam concrete block mixed with water using construction mixer or a drill with a special attachment. If you don’t have a mixer, you should take into account that the greater the power of the drill, the better the adhesive mixture will be mixed. You can use any water; the water consumption is indicated on the packaging of the dry mixture.

So, pour into a construction bucket required amount water. While stirring constantly, gradually add the adhesive dry mixture. Approximately 7-10 minutes after complete dissolution, re-mix the adhesive mixture.

To maintain the required consistency of the glue during construction work, it is necessary to stir it periodically.

In order to properly prepare glue, there is no universal recipe. Each brand and each manufacturer has its own recipe for preparing the adhesive solution. Before purchasing, you should remember that the quality of the glue is directly dependent on the amount of water added to the solution and the dry mixture is added to the water, and not vice versa.

You should also know that an overdose of water significantly worsens the characteristics of the adhesive mixture. Therefore, before you cook working mixture, you need to carefully study the instructions for its preparation.

Very often, some home craftsmen ask the question: what glue to use when laying blocks in winter? Experts say that in winter time years, when the air temperature reaches -15°C, you need to use frost-resistant glue, which includes antifreeze additives, as evidenced by the inscription on the packaging of the dry mixture.

The order of laying blocks

The blocks themselves are laid 15 minutes after the working surface is prepared.

First of all, if necessary, you need to prepare work surface. It should be firm, dry and free of foreign materials. Soot, dust, oil and loose elements must be removed. Significant surface unevenness must be leveled; for this purpose, glue for gas silicate and foam concrete blocks can be used.

So, on a previously prepared work surface, apply a layer of adhesive mixture using a trowel, then level it using a notched trowel. must be laid no later than 15 minutes after you apply the glue to the work surface. You can adjust the position of the block within 10-15 minutes after you have laid it. The setting time of the adhesive at air and base temperatures from -15 to +25°C is 2 days, and the adhesive solution gains full strength after 72 hours.

Correct laying of the block involves applying glue to the horizontal surface of the already laid bottom row and to the vertical part of the previous block. If it is necessary to lay an additional sawn block, it must be coated with glue on both sides.

The correct order of applying glue is: on the horizontal surface of the already laid out bottom row and on the vertical part of the previous block.

Adhesive for gas silicate and foam concrete blocks allows you to significantly reduce the consumption of the adhesive solution due to its special composition, which allows you to lay blocks with seams of 2-3 mm. Of course, glue consumption primarily depends on the quality of the blocks used. When using blocks with a perfectly flat surface, the adhesive consumption will be approximately 20 kg/m³ with a masonry layer thickness of 2 mm. Well, and, accordingly, if there is a need to lay blocks with a thicker layer, then the amount of glue will be increased. Experts say that it is always necessary to purchase a dry adhesive mixture with some reserve.

Features of use

When using glue for laying gas silicate and foam concrete blocks, it should be taken into account that only the second row of blocks is laid on the glue. The first row must be laid on cement mortar. This is done in order to somehow smooth out the existing unevenness of the foundation surface.

Cold bridges appear due to a decrease in the thermal conductivity of a structure during its operation.

If you plan to lay gas silicate blocks in one row, then you must use glue. Since it has the same density as gas silicate. By laying gas silicate and foam concrete parts on cement mortar, which has a density of about 2000 kg/cm², the end result will be “cold bridges” in the form of masonry joints. The consequence of the formation of “cold bridges” will be a significant decrease in the thermal conductivity of the structure during its operation. Based on this, experts who have experience using glue for, claim that the most practical way laying such blocks in 2 rows (20 cm each).

You need to remember that only the second row of blocks is placed on glue, and the first is placed on cement mortar.

Carrying out masonry work, should be taken into account external factors influences that play a fairly important role. In particular, this refers to the air temperature and humidity in the room. For example, a decrease in room temperature, as a rule, entails a significant increase in the setting time of the glue. And, conversely, increasing the temperature sharply reduces the setting time. In addition, due to the room temperature, the formation of shrinkage cracks. In rooms with high humidity drying of dry adhesive mixtures is significantly slower. And in rooms with insufficient humidity, due to the enormous speed of setting, microcracks appear in masonry joints. So if you don't want to get extra headache, monitor the humidity and temperature in the room.

The more the adhesive solution costs, the more professionalism will be required to use it. A good adhesive mixture must be applied correctly (thinly), otherwise using it will cost you a pretty penny.

And for such work you will need a certain skill, dexterity and a fairly smooth foam concrete or gas silicate block! It should be taken into account that expensive mixtures are not designed for thick masonry layers; they will simply crack and burst. If everything listed above is missing, then the masonry should be done using a regular mortar of cement and sand.

It is necessary, and rightly so! But this is not always possible. The reason lies in the absence experienced specialists, which could provide a masonry joint of 2-3 mm. Not every qualified mason is capable of performing such work. Based on this, when hiring masons, immediately discuss this condition with them.

Large-block construction of houses is beneficial in all respects: it is carried out faster than traditional brickwork Moreover, glue for gas silicate blocks is consumed much less than cement-sand mortar. Now on sale the new kind– foam glue in cans: one tube is equivalent to 25 kg of dry mixture, but the product has not been time-tested.

You need to choose a material according to its characteristics. Adhesive mixtures will cost more than cement mixtures, but in the end their cost turns out to be less than production costs masonry mortar, delivery of sand and cement to the construction site.

Gluing blocks requires the professionalism of masons and the precise geometry of the cellular brick.

Features and advantages of adhesive for gas silicate blocks

Masonry and adhesive composition EK 7000 GSB

Special adhesive mixtures, in addition to Portland cement, contain a number of other components. Quartz sand provides a low thickness of the bonding layer. Mineral additives retain water and prevent cracks. Polymer plasticizers reduce heat loss through mortar joints and increase the adhesion force between blocks.

Advantages of adhesive mixtures:

• Thin joints (2 - 5 mm) - and the cement-sand mixture requires a layer at least 15 mm thick, otherwise the masonry will lose strength due to the hygroscopicity of the blocks.
• Economical – to put aerated concrete blocks, glue will be required 6 times less than ordinary solution, and the price is only twice as high.
• Plastic.
• Fire safety and fire resistance.
• Resistant to moisture and low temperatures.
• No cold bridges in the masonry.
• Connection strength.
• Hardening speed.
• Ease of production ready mixture from a semi-finished product.

How to choose an adhesive composition

To avoid having to check the quality of your purchase during direct installation, be sure to use the following recommendations:

• When choosing a manufacturer, it is better to choose a company with well-established technology.
• A low price is a sign of a fake or low-quality product.
• Use the product within the time indicated on the packaging.
• Excessive humidity or low temperature in the room for storing mixtures leads to a deterioration in the physical and mechanical properties of the resulting solutions and a decrease in the strength of the masonry.
• You should adhere to the technology for preparing the solution, conditions of use, drying - if you have to work in winter period at temperatures below +5, it will be necessary to add special components that increase the frost resistance of the composition.

When choosing, specify the amount of glue. According to the norm, consumption per 1 m2 is 1.5-1.6 kg of adhesive powder. Knowing the consumption of glue for gas silicate blocks per 1 m3, it is easy to calculate the dry mixture required for constructing the box. To dilute 25 kg, 6 - 6.5 liters of water are required, that is, the weight of the finished glue from 1 package is 31 - 31.5 kg. You can calculate the quantity for masonry using a calculator.

To glue a cubic meter of masonry you will need 15 - 40 kg of mortar - consumption depends on the thickness of the layer. For comparison: at 100 cubic meters gas silicate uses 3000 kg of cement. The layer of the applied composition is several times thicker, which means the consumption is higher.

What is the glue consumption for gas silicate blocks?

To understand how much solution is needed, consider the table. The information given is based on the minimum joint thickness.

How to optimize glue consumption for gas silicate blocks, technological techniques

Before you start gluing the blocks, you should do preparatory work and operations so as not to waste excess glue, and at the same time create a strong and a reliable wall.

• Basic masonry techniques. The adhesive mass is applied to the vertical or horizontal plane of the first laid block with a 6x6 cm comb spatula. The prepared gas silicate blocks should be placed on the glue, lightly pressing against the base, followed by pressing with a rubber tool (hammer). This way a thickness of no more than 5 mm is achieved. The reinforcing mesh is covered with a 2-5 mm layer of glue, and metal rods (diameter 8 mm) are poured. Optimal temperature drying – +5 – +25 o C.
  

  Glue consumption depends on weather conditions. If work is carried out in winter, a frost-resistant composition is used.

  If you adhere to the instructions and prepare the mixture correctly, then the glue consumption for gas silicate blocks will be economical, and the mounted walls will be monolithic.

Gas silicate blocks received widespread. The motives are clear: low price on the material, high speed of construction of structures, as well as relatively light weight, which in turn allows you to abandon deep foundations.

However, gas silicate itself is a porous material, which makes it colder and reduces the thermal efficiency of the building. Heat escapes through many small holes in the block. It is these features that should be taken into account when choosing masonry adhesive.

For gas silicate blocks, glue based on sand, cement, plasticizers of organic and mineral origin is used. The thickness of the seams and glue consumption will depend on the manufacturer and the elements included in the glue.

Composition and properties of adhesive for gas silicate blocks

The composition of the adhesive for gas silicate blocks necessarily includes:

• fine sand;
• binder base in the form of high-quality Portland cement;
• modifying inclusions.

Polymer additives provide plasticity and adhesive properties of the solution. Modifying inclusions retain internal moisture, which protects the seams. The solution ensures high adhesion of the blocks, is not absorbed by them and reduces their thermal conductivity.

These properties of the composition are among the main features of gas silicate adhesive.

Which glue is best for gas silicate blocks

• Manufacturer. Well-known suppliers value their reputation and carefully monitor the quality of their products.
• Storage and packaging. Important condition for glue - a dry, ventilated room. If you are not sure exactly how to store the product or the packaging is damaged, it is better to refuse. Also, experts do not recommend taking the dry mixture by weight.
• Advance paynemt. Before purchasing glue for gas silicate blocks, it is recommended to make a preliminary calculation of material consumption, which will allow you to more accurately determine your needs and save money. cash not allowing you to buy too much.

Pros and cons of gas silicate glue

The advantages of adhesive for laying blocks include:

• increased level of adhesion;
• resistance to low temperatures and moisture;
• the adhesive composition does not shrink, and also has high speed grasping.

It should also be noted that the products are of interest due to their final budget cost. Although glue solution and costs twice as much as usual cement mortar, glue consumption is 4-5 times less (the solution is applied minimum thickness 2-3 cm).

This also has its advantages:

• increasing the strength of the structure;
• increased thermal insulation;
• Due to the small thickness of the seams, the laying of gas silicate blocks turns out smooth and beautiful.

The disadvantages of gas silicate glue include increased requirements to evenness and the surface being processed.

Where to buy glue for gas silicate blocks

You can buy glue for gas silicate blocks in our online store at a price of 144 rubles per 25 kg bag.

In our store there are different brands and packaging of glue, so you can calculate the required volume and choose the option that is suitable for your purposes.

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 to work with gas silicate blocks represented in trade a large assortment funds. 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 determine which adhesive for gas silicate is the best, it is worth considering reviews from customers who have already tested the material from their 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. 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 undesirable 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 building composition is actively used in the laying of gas silicate structures. The reputation of the glue is gained by its positive properties:

1. 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.
2. The composition does not lose its properties even in direct contact with water, as well as the influence of very low temperatures.
3. The mixed mortar is characterized by excellent plasticity, which makes its use comfortable.
4. The mixture is completely environmentally friendly. No selection occurs toxic substances, since the product does not contain harmful impurities.
5. The composition is more expensive than previous products, and this is due to its qualities.

Aeroc

Mixtures of this brand are characterized by high strength properties. The composition is widely used in masonry with blocks made of cellular material, as well as for lining internal and external blocks with a thin layer. 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 additions. 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 presented the best adhesive mixtures, according to the opinion of builders who 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:

1. Initially, you tentatively determined that for laying all the walls you will need, say, 63 cubic meters of gas silicate blocks.
2. With a laying layer thickness of 3 mm, the glue consumption per 1 cubic meter of blocks will be 63 packaging bags.
3. 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 to big side, the result is 51 bags.
4. 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 are the key to the longevity of erected buildings.