Gas silicate blocks are one of the most popular on modern market building materials. The houses built from them are characterized by durability, attractive appearance and excellent performance. But, of course, it is possible to build high-quality walls from such blocks only if right choice bonding mixture. In our time, there are several types of such a product as glue for gas silicate blocks on the market. The consumption per 1 m3 of these funds can vary significantly.
Solution or glue?
Sometimes gas silicate blocks laid simply on However, this method of building walls is used only in extreme cases. The advantage of gas silicate blocks is, first of all, that they are able to perfectly retain heat indoors. According to this indicator, such blocks are not inferior even to popular wood. The low thermal conductivity of the gas silicate material is associated primarily with its porous structure.
When using normal cement mortar in the masonry of such blocks subsequently arise And this, in turn, reduces the main advantage of gas silicate to nothing.
When using adhesives building blocks of this variety are stacked using a special technology. The fastening agent is applied on the rows and between the individual elements in a very thin layer. As a result, no cold bridges appear in the masonry. Sometimes such mixtures are applied in a rather thick layer. But in this case, their composition necessarily includes special additives that increase their heat-preserving qualities.
Modern adhesive for gas silicate blocks: consumption per 1m3
The funds intended for laying gas silicate blocks are, in most cases, relatively inexpensive. But, of course, before buying such a composition, you should definitely calculate its required amount. Consumption for adhesives for gas silicate blocks different brands can be very different. Some adhesives are applied in masonry with a layer of 5-6 mm, others - 1-3 mm. The manufacturer usually indicates the permissible thickness on the packaging. Also in the instructions, in most cases, there is information about the estimated consumption per 1 m 3 of masonry.
To do everything necessary calculations, thus, if necessary, it will not be difficult at all. In order to find out the right amount of the mixture, you must first calculate the total volume of masonry. To do this, you just have to multiply and the thickness of each wall, and then add the results.
In most cases, the consumption of glue for gas silicate blocks, according to manufacturers, is 15-30 kg per 1 m 3. That is, for a cubic meter of masonry, the master should take about one bag of the mixture. However, unfortunately, manufacturers usually slightly underestimate the consumption of sold formulations. In fact, most often when laying 1 m 3 it takes 1.5 bags of the mixture.
Characteristics of adhesives for gas silicate blocks
The basis of such compositions is very often the same cement mixture. However, in the manufacture of adhesives of this variety, manufacturers usually add to them, in addition to standard components, special substances that increase their plasticity, moisture resistance and frost resistance. Also, a solution for gas silicate blocks often includes additives designed to improve heat-retaining qualities.
These are, in most cases, dry mixes packaged in bags. The preparation of glue from them is done simply by adding water in the right quantities.
Thus, ease of use is what, among other things, distinguishes the adhesive for gas silicate blocks. The prices for such compositions are usually not too high and are quite comparable with the cost of a standard concrete solution.
Types of adhesive for gas silicate blocks
All compositions currently sold on the market intended for laying this material are divided into several varieties:
adhesives used for the construction of partitions and walls inside the building;
compositions intended for laying outside;
universal mixtures, which can be used both indoors and outdoors;
mixtures with increased speed solidification;
construction adhesive intended for laying the enclosing structures of those buildings that will subsequently be operated in conditions of high humidity.
Glue manufacturers
Of course, when choosing the composition most suitable for laying walls from gas silicate blocks, one should pay attention not only to its specific purpose, but also to the brand of the manufacturer. Today, many companies supply similar mixtures to the domestic market. The most popular brands of adhesives among Russian developers are:
Eunice Uniblock.
"Founding Selform".
"Prestige".
"Etalon Teplit".
Compositions "Unix" for cellular concrete
The laying of gas silicate blocks on the glue of this brand can be done both indoors and outdoors. It is also allowed to use "Unix" for sealing chips in cellular concrete. It is possible to correct the position of the blocks when using this composition within 10-15 minutes. Among the advantages of Unix glue, consumers include, among other things, the fact that it differs in heat-preserving qualities almost the same as themselves
Also, the advantage of such mixtures is resistance to moisture and very low temperatures. According to the manufacturer, "Unix Uniblock" is an absolutely environmentally friendly product. The recommended layer of its application is 5-10 mm.
Another undoubted advantage of adhesives of this brand is their availability. You can buy "Unix Uniblock", unlike mixtures of many other manufacturers, in almost any building materials store.
Blend "Found Selform"
This summer glue is made on the basis of a cement-sand mixture. He also earned relatively good reviews from consumers. Its undoubted advantages, among other things, include low cost with good performance characteristics. In order to give the adhesive the appropriate properties, the manufacturer adds special substances to it that increase its heat-preserving qualities.
The thickness of the masonry joint when using the Osnovit Selform mixture can be 2 mm. The advantages of this glue include the fact that it is able to penetrate into the smallest recesses and irregularities of the blocks, which, in turn, increases the adhesion strength. It also has one more unconditional advantage of this adhesive for gas silicate blocks. Consumption per 1 m3 of it is only about 25 kg.
Means Ytong
Adhesives of this brand are quite expensive. But they also have excellent features. It is possible to impose Ytong on blocks with a layer of only 1 mm. Therefore, its consumption is very small. The composition of the mixtures of this brand, in addition to cement, includes polymers, mineral additives and special substances that give it plasticity. Among the advantages of Ytong adhesives, consumers include, among other things, their ability to quickly set. Also, the advantage of mixtures of this brand is a high degree of frost resistance. Such adhesives can also be used in the construction of enclosing structures in winter time of the year.
Mixtures "Etalon Teplit"
Like Unix, such formulations are found on sale quite often. The advantages of winter glue "Etalon Teplit" consumers attribute primarily a high degree of its plasticity. Being applied to gas silicate, this composition does not exfoliate and does not spread. You can store this glue after preparation without loss of quality for several hours. At the same time, in masonry, it seizes literally in 10-15 minutes.
Reducing the cost of construction is also what this gas silicate block adhesive is valued for. Consumption per 1 m3 of it is only 25-30 kg.
Means "Prestige"
It is also a very high quality mixture, which can be used both in the warm season and in the cold. The undoubted advantages of these compositions, consumers include primarily a high degree of plasticity and reliability. Viability glue "Prestige" retains for 3 hours. It can be applied to blocks with a layer of 3-6 mm thick. The set mixture reaches its full strength after three days.
Glue for gas silicate blocks: prices for products from different manufacturers
The cost of compositions intended for laying gas silicate blocks may depend not only on the brand, but also on the supplier. The price of Unix glue is, for example, 240-260 rubles. per bag 25 kg. For the same amount of "Founding Selform" funds, you will need to pay about 200-220 rubles. Ytong glue costs about 310-330 rubles, and "Etalon Teplit" - 170-200 rubles. For a bag of 25 kg "Prestige" you will have to pay only 130-150 rubles.
Aerated concrete, foam concrete or other blocks made on the basis of cellular concrete require compliance with the laying technology. The use of special solutions compensates for the high water absorption of the material. For a private builder becomes topical issue about how much glue goes per 1 cube of aerated concrete.
Found on the market two main types of adhesive designed to work with cellular concrete - standard and frost-resistant. In the first case, the composition is used to maintain summer jobs. The list of ingredients includes Portland cement. The color of the material is white, which fits well with the concept of masonry and allows you to save on finishing. Frost-resistant adhesive is designed for all-season work, but up to -10°C. The color of the composition is grey.
The advantages and differences of the material can be described as follows:
- the presence of antifreeze additives;
- application for internal and external works, which is due to environmental friendliness;
- glue does not allow the occurrence of cold bridges;
- heat loss of the structure is minimized;
- high resistance to negative impact;
- ease of operation is ensured by the plasticity of the finished mixture;
- moisture resistance.
When interacting with adhesives, it is shown to observe safety precautions. The master must work in personal protective equipment
In addition to the instructions that the instruction contains, additional data should be taken into account:
- storage of bags with the mixture should be organized in a heated, dry room, where the working solution is mixed;
- the temperature of the water used for the preparation of the adhesive is not higher than 60°C;
- the temperature of the finished mass must be at least 10 ° C;
- the block must not be covered with snow or ice;
- the mixture is consumed within half an hour after kneading;
- in addition to frost-resistant additives, the material contains fine-grained sand and plasticizers, which make it possible to equip thinner seams. This reduces the consumption of the mixture and eliminates the difference in price with conventional mixtures;
- when laying, all seams are completely filled.
The general recommendations are that Do-it-yourself installation of the block must occur no later than 15 minutes. after spreading the glue. Thickness correction is implemented within three minutes. The pot life of the standard mixture is two hours. All excess is removed with a trowel. To keep material consumption to a minimum, it is regularly mixed during work to maintain a uniform consistency.
Adhesive consumption for aerated concrete per 1 m³
How much mixture is needed per cube of aerated concrete? The average consumption of the composition is 25.0 kg / m³, which corresponds to one standard bag. Consumption for aerated concrete per 1 m² is taken as 1.50 kg. This amount ensures the creation of masonry with a joint thickness of 1.0-2.0 mm.
When the building conditions are such that a thicker layer is required (up to 3.0 mm), consumption increases and can be 1.5 bags per cubic meter.
If a high-quality aerated concrete adhesive is used, the consumption per m³ depends on the specified parameters:
- surface quality - the smoother it is, the less mixture is required;
- bricklayer qualification - a master with high experience is able to implement jewelry styling, leaving minimal gaps between the modules;
- actual construction weather conditions.
Adhesives with fine-grained sand are best at blocking the formation of cold bridges
How to prepare glue for aerated concrete with your own hands
The working solution can be used for laying slabs, blocks of cellular concrete, for filling and leveling surfaces. The composition is applied to a clean base.
The preparation of the mixture is subject to the following principles:
- dry matter is poured into water, 0.21-0.24 l is taken per 1.00 kg;
- the mass is stirred manually or with a tool - a drill at low speeds;
- the result should be a homogeneous dough;
- the product is ready for laying after 3-5 minutes. maturation;
- re-mixing before use;
- experienced craftsmen advise using the material within 30 minutes, although manufacturers indicate an hourly glue pot life.
The adhesive is evenly distributed on the horizontal and vertical surface neighboring blocks using a notched grater or other tool, the next block is laid.
Specifications
The composition of the standard mixture is represented by mineral aggregates and binders, polymer modifying additives.
The technical characteristics of the material are presented in tabular data:
Glue for aerated concrete, reviews and prices
Builders who have already built a house from aerated concrete note that excellent properties were shown by adhesives of the brands "Volma", "Cerezit", "Eunice", " Stone Flower»
. The “Quick” brand deserved a lot of negative ratings, which, according to reviews, has an unpleasant chemical odor, a heterogeneous structure and hardens too quickly.
How much does aerated concrete adhesive cost? When considering cost, you should not choose too cheap or discount material - it is quite possible that the expiration date is nearing completion and count on high specifications do not have to.
The minimum cost of glue for aerated concrete brand "Volma" is about 270 r, "Eunice" - 265 r, "Stone Flower" - 250 r. Knowing how much glue is needed to lay gas silicate blocks, you can calculate the total amount of material in bags.
Having calculated how much glue for aerated concrete is needed, you can determine the final cost of material costs.
If work is carried out in hot or too windy weather, the container where the glue is mixed should be covered with a damp cloth.
How much glue for aerated concrete costs and how much glue is needed per cube of aerated concrete is described in the video:
There are still cases when unscrupulous builders install gas silicate blocks on a cement-sand mortar.
However, such works are admissible only for .
The composition of cellular concrete provides for the use of special adhesive mixtures.
Therefore, any cement mortars will not be able to guarantee high-quality masonry with low thermal conductivity.
For the simple reason that cement joint obtained with a thickness of 10-12 mm. Whereas the plastic adhesive for cellular blocks, applied to the surface with, provides seam thickness is only 1-3 mm. It should be understood that the maximum heat loss in winter period will occur through the seams.
Attention!
Cement mortars poorly retain moisture, and all highly porous aerated concretes absorb it from such a composition very quickly, which minimizes the “adhesive” qualities of the cement mixture and can cause premature failure of the masonry.
Even preliminary wetting of the surface of the blocks with water before applying the solution will not allow correcting this situation.
Among other things, if the construction of street structures is carried out at low-temperature air indicators, then absorbed by the aerated concrete block from the cement mortar moisture freezes and causes cracking of the building material. It is for these reasons that special modern adhesive compositions for aerated concrete masonry are used in construction.
Now let's talk about the price. Cement-sand mortar will cost less than glue for gas silicate blocks with special additives and plasticizers. But do not forget about the thickness of the resulting seam. In the case of a solution, it will be 4-5 times thicker. So where is the savings?
Glue composition
It is necessary to choose glue for aerated concrete very carefully, depending on the volume of masonry being performed and the time of year in which construction is supposed to be carried out.
At present, the market of modern building materials is ready to offer domestic and foreign adhesive mixtures that can be used exclusively in warm time of the year.
As well as universal compositions, ideal for construction works, both in summer and with slight frosts.
Glue for aerated concrete blocks is mainly sold in packages of 25 kg. Some companies produce glue in 20 kg bags.
As a rule, professional builders use universal mixtures, which include:
- binding component provided Portland cement;
- fine-grained and qualitatively purified from impurities sand;
- modifier additives that can prevent cracking of the seams and allow moisture to be retained;
- plastic polymer additives, aimed at improving adhesion in low-temperature conditions (for the winter version).
Of course, universal (winter) adhesives, due to their high quality characteristics and breadth of application, are somewhat more expensive than seasonal adhesives.
winter glue
Frost-resistant or universal adhesives are sold packaged in bags and visually noticeably differ from conventional mixtures characteristic gray color.
The use of such an adhesive is not limited exclusively to external masonry work, therefore, the universal composition is also in demand in the construction of internal partitions or walls.
If necessary, such an adhesive composition can also be used for puttying and high-quality leveling of wall surfaces.
A distinctive feature is ability to harden without shrinkage.
In order to preserve the adhesive properties of the adhesive material, manufacturers have developed a number of recommendations, including the need to store dry mixes in heated and non-humid rooms and use water at a temperature of 50-60 ° C to prepare the adhesive solution.
The surface of aerated concrete blocks before masonry must be freed from ice or snow mass with a jet warm air from building hair dryer. All the nuances are described in detail in the article about. It is important to remember that divorced winter adhesive mixtures not subject to long-term storage and should be used after mixing as soon as possible.
Adhesive dry mixes with additives that allow construction masonry work in the winter:
- Polimin;
- Ceresit;
- Baumit;
- UDK-TBM;
- Kreisel;
- Aeroc.
Adhesive foam
In addition to traditional adhesives, represented by thin-seam or thin-layer dry masonry mixtures, such modern materials, as aerosol polyurethane adhesive-foams, sold in special balloon tubes.
Adhesive foams favorably differ in the following characteristics:
- high rates of profitability;
- improved performance;
- maximum high level adhesion, which is achieved a couple of hours after use;
- the minimum thickness of the seams allows you to completely eliminate the formation of cold bridges;
- construction work can be carried out in winter, with air temperatures down to minus 8-10°C.
However, according to experienced builders, the use of such an adhesive composition does not always justify itself, and in some cases, when foaming the seams, a slight fragility of the applied mass may be noted. In addition, the foam this moment costs much more than glue. During the construction of a two-story country house it is better to save money and choose glue. In addition, this will not affect the quality of the walls.
Adhesive foams in polyurethane-based bottles in the middle price category:
- "Ceresit SM-115";
- LimFix;
- TYTAN-Professional;
- Bonolit "Heat formula".
Consumption per 1 m 3
Average adhesive consumption per aerated concrete blocks may vary depending on the thickness of the applied layer and the quality parameters of the surfaces to be bonded:
- one cylinder of adhesive foam is able to replace a bag of dry adhesive mixture weighing 25 kg. Consumption per cubic meter of aerated concrete masonry most often does not exceed one balloon tube;
- dry adhesive mixtures for aerated concrete blocks are sold in loose form, packaged in standard bags, therefore Approximately 20-25 kg of high-quality adhesive materials are consumed for each cubic meter of block masonry.
Excellent indicators of geometric accuracy of aerated concrete building blocks make it possible to minimize the consumption of glue. Optimal the thickness of the glue line should vary between 1-3 mm.
When buying building blocks, managers will calculate the required number of bags of adhesive composition, based on the consumption of glue for gas silicate blocks per 1m 3, and offer to buy it together with blocks in order to save on delivery. But do not rush to take the whole batch of glue at once. If you have personal vehicles, it will not be difficult to bring a few bags from the nearest store.
Firstly, there are often cases when the developer, after finishing the laying of walls a few extra bags left glue.
Secondly, oddly enough, the cellular concrete adhesive in the factory can cost more than in hardware stores. Check prices in advance.
Thirdly, you can buy 1-2 bags of glue from various manufacturers for testing and offer builders to choose with which more convenient to work and fasten the blocks.
How to prepare masonry adhesive
For self cooking adhesive composition based on dry mixes will require:
- a medium-sized container in which the working solution will be mixed;
- construction mixer or an electric drill with a nozzle that allows you to evenly mix the dry mixture and quickly bring it to a homogeneous state;
- measuring containers that contribute to the most accurate observance of the proportions recommended by the manufacturer.
The loose dry mixture is poured into required quantity into a large container and then a measured volume of net and warm water . As a rule, about 0.20-0.22 liters of water is used for each kilogram of dry mix. Thus, the average water consumption for one bag of building material weighing 25 kg should not exceed 5.0-5.5 liters.
Attention!
Be sure to read the instructions on the adhesive package. There are given quantitative and temporal characteristics specifically for your option. This instruction must be followed.
After kneading with a construction mixer or a drill with a nozzle you need to let the working solution brew for a quarter of an hour and remix. 
A properly prepared mixture should not contain lumps or have a pronounced separation into fractions. Ready adhesive solution for aerated concrete blocks should be completely used up within a couple of hours after kneading. The exposure time of the applied layer is a quarter of an hour. The builder has about three minutes to adjust the position of the aerated concrete block.
What glue to choose in the store
High-quality glue is distinguished by the content of special fillers and additives, which determine high rates in terms of such parameters as the level of moisture protection, thermal protection, elasticity and durability of the masonry.
Masonry adhesive solutions on the building materials market vary not only in quality characteristics, but also in affordability.
It should be understood that miracles do not happen, and the cheapest adhesives contain fewer additives and plasticizers, and more sand. Therefore, it is better to focus on the average price.
It is also worth learning about the preferences of your builders. They have worked with different masonry materials and can advise what is definitely not worth taking.
It is important to ensure the quality of such mixtures and the availability of all necessary certification documentation. When choosing, it is recommended to give preference to materials from well-known and well-established manufacturers.
Useful video
Watch a short video on how to prepare masonry adhesive:
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 conditions work, characteristics of adhesive compositions and requirements for construction. 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 for each 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, affecting deviations from the average flow rate 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 optimal thickness 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 Thickness mixtures 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 loose mix for cement base 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. Average 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.
Aerated concrete is an excellent material for masonry. At the same time, glue for gas blocks will need half as much as compared to cement-sand mixtures (joint thickness 0.5 versus 1 cm). But to save money and make quality work, you need to know some of the nuances.
How much glue do you need
The consumption of glue for aerated concrete per 1 m3 is approximately 23-26 kg, depending on a number of factors, or 1.5-1.7 kg per 1 m2.
Adhesive costs will be affected by:
- glue quality;
- recommendations for use declared by the manufacturer;
- temperature conditions (base and solution must be at least +50 C);
- condition of the blocks: with defects or even;
- weather;
- usage necessary tools(carriage or bucket trowel), which allows you to speed up the laying process, minimize glue consumption and reduce the cost of work;
- the number of reinforced layers;
- qualifications of workers: masons, as a rule, make seams of 0.5 cm and few use standards - 0.3 cm.
Consumption of adhesive for aerated concrete per 1 m3 in kilograms
| With a block thickness (cm) and a density of 300-400 kg / m 3 | Consumption in kg \ per cube | Consumption kg \ m 2 |
| 10 | 19,3-19,4 | 1,9-2,0 |
| 15 | 19,9-21,0 | 2,9-3,0 |
| 20 | 16,4-16,8 | 3,3-3,5 |
| 25 | 15,9-16,2 | 4,0-4,4 |
| 30 | 15,5-15,8 | 4,6-5,2 |
| 37,5 | 15,1-15,4 | 5,7-6,0 |
| 40 | 14,9-15,1 | 6,0-6,3 |
How to check which glue better fit for clack? Must be purchased per kilogram various formulations, cook them according to the recipe and let them completely harden on glued gas blocks (two are enough). After a day, you need to try to break the seam and evaluate the fault location:
- the fault coincides with the seam - glue should not be used;
- the fault partially touches the seam - the quality is in doubt;
- the seam remained intact and the gas block itself suffered - excellent quality, such glue can be chosen for any work.
Another test option would be the weight of the adhesive after curing. In several containers of the same size, you need to score the same amount of glue. After a day, weigh. Preference should be given to the solution whose weight is less. This suggests that a significant part of the moisture is gone and the mixture will be strong, no less thermally conductive.
Of course, testing glue is a troublesome and costly task, but if a large-scale construction is planned, it is still not worth refusing to diagnose the declared parameters.
Advantages of glue for aerated concrete:
- material consumption is 6 times lower, and the cost, unlike cement-concrete mortar, is only 1.5-2 times higher, so the savings are obvious;
- the use of a fine-grained mixture helps to avoid the formation of "cold bridges";
- a thin layer of adhesive base can effectively emphasize the evenness of gas blocks;
- the solution can be used at any time as a putty;
- the adhesive hardens without shrinkage;
- the composition of the solution with regular stirring always remains homogeneous, which increases the bonding strength;
- the plasticity of the material virtually eliminates heat loss;
- thin-layer masonry of gas blocks is much stronger and more durable than standard cement-sand mortars.
How to prepare and use glue
To prepare the glue, you will need a construction mixer or a drill with a suitable nozzle. Dry concentrate is added to pre-collected water (temperature up to +600 C). After thorough mixing, the solution is allowed to stand for 15 minutes and beat again for about a minute. If the laying will be done in the cold season, it is better to give preference special adhesives with antifreeze additives and store the mixture at a temperature not lower than +50 C. In hot weather, the solution is suitable for work up to 120 minutes, in cold weather - 25-30 minutes.
When using the adhesive composition, it must be taken into account that the solution requires stirring every 15-20 minutes to maintain the homogeneity of its consistency.
It is undesirable to work with strong wind or precipitation (rain, snow). So the solution will “gain moisture”, which will affect its adhesive ability.
Before using the adhesive base directly, it is worth carrying out a test bonding to determine which joint thickness will be optimal.
Approximately, the indicators will be as follows: for 1 kg of ordinary glue, 0.3 liters of water; for a winter mixture, 0.2 liters will be required. At the same time, the time spent on laying and correcting blocks is reduced to the required minimum.