When planning the construction of their own home, more and more site owners are turning their attention to aerated concrete blocks. Indeed, this material allows you to build walls in the shortest possible time, with minimal labor costs. And the building, thanks to the peculiarities of the structure of the blocks, gets very good thermal insulation characteristics.
In order for aerated concrete blocks to fully justify their purpose, they must be stacked exclusively on special glue. Such assembly compounds are presented in two categories of materials - these are dry building mixtures, which allow you to prepare glue immediately before work, and ready-to-use cylinders with foam glue. The choice is for the owners of the future home, but in any case, you will have to decide on the required volume of material acquisition. And the universal calculator for calculating the amount of glue for laying aerated concrete placed below will help with this.
Brief explanations will be given on working with it.
Aerated concrete is an excellent masonry material. In this case, the glue for gas blocks will need half as much as compared to cement-sand mixtures (seam thickness 0.5 versus 1 cm). But in order to save money and do high-quality work, you need to know some of the nuances.
How much glue is needed
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.
The cost of glue will be influenced by:
- glue quality;
- manufacturer's recommendations for use;
- temperature regime (base and solution must be at least +50 C);
- the state of the blocks: with defects or even;
- weather;
- the use of the necessary tools (carriage or bucket trowel), which allows you to speed up the masonry process, minimize the consumption of glue and reduce the cost of work;
- the number of layers to be reinforced;
- qualifications of workers: bricklayers, as a rule, make seams of 0.5 cm and few use standards - 0.3 cm.
Consumption of glue 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 / cubic meter | 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 is best for the clack? It is necessary to purchase a kilogram of various compositions, prepare them according to the recipe and allow them to completely solidify on the glued gas blocks (two are enough). After a day, try to break the seam and assess the place of the fault:
- the break 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 option to check is the weight of the adhesive after curing. In several containers of the same size, you need to hammer 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 heat-conducting.
Of course, testing glue is a troublesome and costly occupation, but if a large-scale construction is planned, you should not refuse 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 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 glue hardens without shrinkage;
- the composition of the solution, with regular stirring, always remains homogeneous, which increases the strength of the adhesion;
- the plasticity of the material practically eliminates heat loss;
- the 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 need a construction mixer or drill with a suitable attachment. Dry concentrate is added to pre-collected water (temperature up to +600 C). After thorough mixing, the solution is allowed to settle 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 to 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 an adhesive, it must be borne in mind that the solution needs stirring every 15-20 minutes to maintain its homogeneous consistency.
It is undesirable to carry out work in strong wind or atmospheric precipitation (rain, snow). So the solution "picks up moisture", which will affect its adhesive ability.
Before using the glue base directly, it is worth conducting a test gluing to determine which joint thickness will be optimal.
Roughly, 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.
Aerated concrete is a convenient material for masonry. It is lightweight and fits on glue, which allows thin seams to be created to minimize cold bridges. Consumption of glue for aerated concrete per 1 m 3 is about 25 kg (1 standard bag).
Conventional glue for aerated concrete blocks is consumed at the rate of 1.5 kg of dry concentrate per 1 m 2 of masonry. This amount of the mixture will be enough provided that a layer is laid with a thickness of 1-2 millimeters. Sometimes, when laying gas blocks, seams up to 3 mm thick are left. On average, one bag of glue, that is, 25 kg, is spent on laying 1 m 3 of gas blocks. Sometimes the consumption can go up to 1.5 bags per cubic meter.
The glue consumption depends on several factors:
- surface - the smoother it is, the less consumption;
- qualification of a craftsman - an experienced craftsman can do truly jewelry work, leaving minimal gaps between the blocks;
- weather.
it costs a little more, since antifreeze additives are added to it. However, thanks to plasticizers and fine-grained sand in the composition, it allows you to make thinner seams, which reduces glue consumption and makes winter laying at a cost comparable to conventional ones. But when laying gas blocks in winter, you need to remember that the seams must be completely filled, and the mixture must be used in 30 minutes, while in warm weather it can be consumed within two hours.
Superintendent's advice:
Before gluing aerated concrete blocks, it is worth, firstly, to read the manufacturer's recommendations on the use of glue, and secondly, to carry out a test gluing in order to determine the optimal seam thickness.
To minimize the consumption of glue, it must be mixed during the laying process to maintain a uniform consistency.
From the author: welcome, dear reader. In this article, we will analyze what is the consumption of glue for gas silicate blocks per 1 m 3, and also talk about how to correctly calculate and characterize the materials with which we have to interact during the construction process. So let's get started.
A source: http://stroim-dom.in.ua
As we know, gas silicate blocks, like and, appeared relatively recently. All of the listed materials can be conditionally reduced to the category of "one-order". However, they do have some differences. But our article is not about that. In construction, these materials have been used since the days of the USSR. Moreover, we are talking not only about the rich in all kinds of foreign innovations of the 1980s. These materials began to be introduced back in the middle of the 20th century, therefore it would not be entirely correct to call them a novelty. Although, yes, in Russia, Ukraine and other countries of the former USSR, they became most widespread precisely in the 1990s – 2000s. And nowadays, gas silicate is very popular in the construction of both private residential buildings and household buildings, for example, garages or greenhouses.
This popularity and demand is due to several fundamental factors, among which the following can be distinguished:
- good thermal insulation properties. This does not mean that the house does not have to be insulated at all, but the structure of the material looks like the blocks themselves are a good insulation;
- relatively high speed when working. The blocks are much larger than standard bricks, so it takes less time to build the masonry;
- saving bonding solution. When compared with brickwork, a gas silicate / aerated concrete / foam concrete masonry will require less bonding agent. If we try to reduce all the indicators to a common denominator, then in the end we will get the following result: you will spend 20-25% less coveted ₽ (or ₴) on a bonding solution for a gas silicate wall;
- relatively low cost. A gas silicate wall will cost you less than a brick wall of the same height.
A source: http://mainstro.ru
Now we will characterize the adhesive composition, and then find out what is the consumption of glue when laying gas silicate blocks.
Advantages of using glue for gas blocks and its properties
As we understand, a special adhesive composition for gas blocks was developed for a reason. Its use has some advantages over, say, the usual and familiar cement mixture that is used when working with bricks. Now we, in fact, will list them:
- the presence of Portland cement in the adhesive composition, as well as fractional sand. This allows you to reduce the thickness of the applied layer;
- thanks to its structure, the glue is evenly applied to the work surface, filling the space. Due to this, the adhesive properties increase;
- one bag of dry mix (25 kg) will take about 5.5 liters of water. Due to this, the humidity inside the building will not be increased;
- low heat transmission capacity. Due to this property, the likelihood of the formation of cold spots is reduced;
- high adhesion (adhesion to the working surface);
- resistance to cold and humidity;
- fast setting and drying of the adhesive without (!) any shrinkage;
- frugality. The fact is that glue can be used not only for its intended purpose - that is, for gluing, but also as a putty;
- relatively low cost;
- ease of use (of course, if you have certain skills).
It should be noted that the type of glue that should be used during work depends on the weather conditions. For example, in the cold season, you need to choose a special frost-resistant glue. It should be kneaded, of course, at room temperature, using hot water (40–60 ° C). You need to take out the finished mixture in the frost under a lid. At the same time, keep in mind that the curing time of the glue in frost is rather short, therefore, it is necessary to correct the element planted on the glue immediately. You will have no more than three minutes for this.
Among the components of the adhesive composition, the following must be present:
- Portland cement;
- fine sand that has passed the sifting procedure;
- modifiers;
- polymer additives.
To reduce the consumption of bonding agent per cube, you should use the correct tools when working. Here is a list of everything you need to get started:
- notched trowel for applying adhesive;
- rubber hammer;
- mixing paddle;
- saw with carbide teeth;
- wall chaser;
- coarse grater;
- metal brush;
- 90 ° C elbow for right angle cuts.
Now about the most important thing
And the main thing for us is to find out how much glue is needed for the construction of gas silicate masonry. The consumption rate of glue for 1 m 2 of a gas silicate block is ≈1.5–1.6 kg of dry glue mixture, provided that the thickness of the layer applied to the surface is 1 mm.
A source: http://remtra.ru
Now, through elementary calculations, we find out that 1 m 3 will take from 15 to 30 kg. Alas, it is not possible to give an exact figure, but we will proceed from the fact that 25 kg will be consumed per cubic meter. One standard bag has exactly this weight. This will make it easier to calculate the expense. So:
- for 1 m² - ≈1.5 kg;
- for 1 m³ - ≈25 kg (one bag).
It is worth considering that these calculations are purely theoretical in nature, since in practice it happens in different ways. That's what it is and practice. 1 m³ can take about 1.5 sacks. What factors affect the consumption of adhesive. We will now briefly list them:
- use of the tool. Here improvisation will be inappropriate - the tools must be used those that are intended for our purposes;
- condition of materials for masonry. Their surface should be even and smooth, but it happens that their condition cannot be called ideal;
- weather. In the cold season, it is better to refrain from such work, especially if you are not a professional in this matter;
- the qualification of the master. This point follows from the previous one. Naturally, in order to carry out such work properly, certain knowledge and experience in this area is required.
The method of applying and preparing the adhesive composition also affects its consumption. Therefore, when cooking, it is necessary to use only a drill mixer (kneading by hand is a thankless task), and dilute with water until a homogeneous consistency. The composition should not be very dry and thick, but not too sparse and liquid, since - in either case - it will not perform the functions assigned to it.
The glue should be applied to the surface in a thin, uniform, even layer. It takes practice, but it's not difficult. After stacking 5-10 pieces, you will already be working like a professional.
A source: http://remtra.ru
That's all the important information you need when calculating the amount of adhesive. Just find out how many m² / m³ of material will be used, then take a calculator and just multiply. When purchasing building materials, the fate should be that you should buy with a small margin. As one of my colleagues used to say, “it's better to stay than not enough”.
Now we will briefly analyze the process of building any structure, be it a residential building or an ordinary barn. The technology will not be fundamentally different.
Construction process
To lay the first row, use the wrong special glue for gas silicate, but a cement-sand mixture. The fact is that it dries much longer, so you will have time to adjust the position of each element in order to achieve the perfect evenness of the wall. The minimum layer thickness of the applied cement-sand mortar should be 10 mm. More is possible, less is not possible (!) In turn, there are no restrictions on the maximum thickness.
First you need to find the highest angle, since you should always start the construction of any walls from this place. Next, using the fishing line - outline the wall. Anyone who has dealt with the construction of a house understands what is at stake. Anyone who has not encountered this will not learn how to build walls without practice.
Now is the time to lay the first gas block. After laying it, you should put one gas block at each of the corners of the structure, and then pull a rope between them. Now, we lay out the remaining blocks around the perimeter of the future structure, while controlling their evenness with the help of the building level, and where it is supposed to make entrances / exits from the future structure, naturally, gas blocks do not need to be laid.
The second, third, fourth and all subsequent rows of aerated concrete blocks should be laid using not cement-sand sweep, but special glue, which reliably holds the structural elements together. But you should first process the starting row with polishing. And so it is to be done with each of the rows. Thanks to this, the glue will be applied to the surface in an even layer, which will allow the composition to reliably fasten the structural elements together.
You should start laying the next row in the same way as we laid the first - from the corners. But only with a ligation, that is, with a shift of half the block. Standard brickwork is built in the same way.
Aerated concrete blocks have a precise geometry that allows them to be laid on thin-layer glue with a seam thickness of 2 mm. But before starting the construction of walls, you need to find out how to calculate the consumption of glue for a gas block.
I would like to start with the fact that the consumption of glue for aerated concrete blocks is significantly reduced in comparison with a cement-sand mortar. But this does not mean that any adhesive mixture has the same consumption for laying a cubic meter of aerated concrete. The cheaper the glue, the greater its consumption and the worse the bonding properties. The same thing shakes the gas block. If it has significant deviations in its size or there are chips on it, then it will simply not be possible to save on the costs of the adhesive mixture.
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Calculation of the amount of glue for gas blocks in practice
So where to find Rglue consumption for aerated block per cubic meter(1 m3)? Of course, this information is on the back of the mixture manufacturer's bag itself. And also the amount of how many kilograms goes to the cube is on the website of the brand from which you buy it. Also, based on our subjective experience, we can say that for laying aerated concrete blocks required 25 kg / 1 m3 adhesive mixture. Such consumption is available for Aerok, Kleyzer KGB and Kleyzer KS, Siltek M-2, Ceresit CT 20, Polimin PB-55.
| Mix manufacturer | Thickness seam |
Consumption of glue for gas blocks per 1 m2 |
| Ceresit CT 21 | 2 mm | 2.6 kg / m2 |
| Kreisel 125 | 2 mm | 2.5 kg / m2 |
| Ytong | 2 mm | 3.0 kg / m2 |
| UDK | 1 mm | 2.5 kg / m2 |
| AEROC | 1 mm | 2.0 kg / m2 |
| Baumit PorenbetonKleber | 2 mm | 3.0 kg / m2 |
These indicators are relevant if the seam thickness does not exceed 2 mm, and the aerated concrete itself has no defects in geometry. When buying a machine norm of aerated concrete (38.88 m3, d400 30x20x60), customers usually buy 39-40 bags of glue, 25 kg each. In 95% of cases, this amount is sufficient. The rule here is how many cubes, so many bags (25 kg each) you need to order. But one more bag is taken in reserve. If you decide to buy 10 cubic meters of aerated concrete, then you need 11 bags of glue. If there are 20 cubes of aerated block, then respectively 21 bags of glue should be ordered. Of course, we are talking about buying at least average quality glue.
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On various construction forums, users often ask what is the consumption of glue for aerated block per 1 m2. After analyzing many modern manufacturers and the conditions of masonry walls, they concluded that, on average, consumption per square is 2.5 kg with a layer thickness of 1 mm. But this is more a statistical indicator than a realistic one. In practice, everything is completely individual. Therefore, once again we want to focus your attention on studying the instructions of the manufacturer of adhesives for aerated concrete blocks.
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