Glue consumption for aerated concrete blocks per 1 m3: examples of calculations + tips for choosing glue

Houses built from aerated concrete are characterized by reliability and durability.The strength and other operational parameters of the building largely depend not only on the quality of the blocks, but also on what kind of glue and in what quantity was used for the masonry. The choice of mixtures for joining aerated concrete products today is huge, but a good product is not cheap.

Agree, it is better to know in advance how much glue will be needed for the construction of an aerated concrete building. Then you will not have problems due to the fact that you purchased more or less mixture than you need. Determine the glue consumption for aerated concrete blocks per 1 m³ it's actually not difficult. You need to know some features and nuances.

In this article we will tell you why it is so important to be able to calculate the optimal amount of glue; we will provide a formula by which you can easily understand how many bags of the mixture you need. We will also list and consider the factors on which the amount of adhesive consumption depends. We will give advice on choosing and preparing glue for laying gas blocks.

Why do you need to know glue consumption?

In construction, houses made of aerated concrete are more economical than brick buildings. This is due not only to the cheapness of the blocks, but also to the fact that special glue is used as a connecting element.

It costs 1.5-2 times more than cement-concrete mortar, which is used for bricklaying. But at the same time, its consumption is six times lower. The result is good savings. But, unfortunately, not everyone knows how to determine how much adhesive composition will be used for masonry.This leads to a number of problems.

Adhesive for laying aerated concrete blocks does not shrink significantly, and also eliminates the appearance of places with increased heat conductivity, providing a stronger and more durable connection

The advantages of having the knowledge and skills to accurately calculate the required amount of glue for building a house from aerated blocks are obvious.

Firstly, this is an opportunity to save money. If you correctly determine the amount of consumption, then there should be no extra bags of glue left after the completion of construction work. Accordingly, there will be no overpayment.

Secondly, situations where the glue has run out and you need to buy more are excluded. The store where you previously purchased the mixture may not have the brand you need. Then you will have to either choose glue from another company, which is not welcomed by experts, or look for the required product elsewhere, or wait for delivery of the required brand. In the latter case, construction will have to be suspended for some time. If you calculate the glue correctly in advance, then such hassle can be avoided.

Thirdly, you will be able to check the estimate compiled by specialists. Some construction companies are unscrupulous and deliberately inflate costs.

Fourthly, knowing the specifics of the calculation, it will be possible to dilute the amount of dry adhesive that is currently needed to lay a certain number of aerated concrete blocks.

Glue for gas blocks is prepared by combining dry matter with water. The mixture is not stored for a long time: it should be used within 2.5-3 hours

If during the construction of a building made of aerated concrete, significantly more or less glue was used than the planned volume, this indicates that either the calculation of the mixture was carried out incorrectly, or significant errors were made during the construction of the structure, for example, the wrong installation technology was used.

Payment procedure

Aerated concrete blocks have precise geometry. Due to this, they can be laid on a thin layer of the binder mixture. When determining glue consumption, you need to adhere to a special algorithm.

Calculation procedure:

1. Calculate how many aerated concrete blocks are needed to construct a building.
2. Assess the evenness of the surface of the products and prepare them for laying.
3. Decide on the thickness of the seam.
4. Read the instructions for the glue. Pay attention to dilution and consumption. Similar information is provided on the back of the bag.
5. Calculate the required amount of adhesive dry substance.

Standard adhesive consumption for aerated concrete per 1 m³ varies from 15 to 30 kg of dry weight. With a layer thickness of 1 mm, about 25 kg of mixture per cubic meter is required. This is one bag of composition.

Similar proportions are typical for blocks with a flat surface, without visible deformations. It is recommended to take one bag of glue in reserve. For example, if 20 cubic meters of aerated concrete blocks were purchased, then 21 bags of adhesive will be required to lay them.

The seams between aerated concrete blocks are made from 1 mm. An adhesive layer of 2-3 mm is considered optimal. For comparison, the thickness of the cement-concrete mortar for reliable fixation of bricks according to the standards must be at least 10 mm

It is not always possible to purchase a batch of ideal blocks. Therefore, in practice, glue consumption can be 1.5 bags per 1 m³. All these figures are approximate and depend on various factors.

To accurately calculate glue consumption, you should use the following formula: ((L+H)/(L×H))×d×1.4

P is the glue consumption in kilograms per cubic meter;

L, H – length and height of the aerated concrete block, respectively (in meters);

d – seam thickness;

1.4 – the consumption value of the dry adhesive mixture, provided that the layer thickness is 1 mm.

Today there are many specialized resources where you can determine glue consumption using an online calculator. This tool takes into account various factors that can affect the volume of block bonding compound.

But for maximum accuracy, it is better to perform all calculations manually. In this case, it is necessary to take into account the dimensions of door and window openings, and the gables of the building. It is important to be as careful as possible when filling out the form. When carrying out calculations, you need to carefully operate with units of measurement, otherwise there is a risk of seriously making mistakes in the calculations.

Features of calculating glue consumption

The amount of glue required to hold aerated concrete blocks together is calculated in kilograms per square or cubic meter.

When purchasing bags of glue for laying aerated concrete blocks, it is important to pay attention to the shelf life of the product. If the composition is expired, then its bonding properties will be worse

To achieve the desired result and obtain a high-quality, reliable seam, you need to observe all proportions when diluting dry matter and follow the recommendations of specialists. You should not try to save money by adding more water to the adhesive mixture than indicated in the instructions. This reduces adhesion.

It is also not recommended to make the seam thinner than necessary to minimize consumption - this will worsen the quality of the bonding of the blocks.

When determining the amount of glue consumption, you need to take into account some features. The consumption declared by the manufacturer may be lower or higher than the actual one. This is explained by the influence of a number of additional factors on the result.

What determines glue consumption?

With large volumes of work, it is quite difficult to determine how much glue is needed for laying aerated concrete blocks. It happens that not 25 kg of glue is used per cubic meter, as planned, but 30-40 kg or 14-15 kg.

To obtain consumption data that is as close to real as possible, it is worth taking into account the influence of a number of factors.

You should not use used blocks. Their price is much lower than new products. But they have significant defects. To make smooth masonry and build a strong house, you will need a lot of glue

The amount of adhesive required for laying aerated concrete blocks depends on the quality of the product. The cheaper the mixture, the worse its composition. It may contain too much sand and other unnecessary fillers.

This negatively affects the bonding properties. Accordingly, the consumption of such glue will be high. If the bulk is represented by a binder, then the mixture will be used more economically.

The geometry of the blocks also has a great influence. The smoother the surface of aerated concrete products, the thinner the layer of masonry adhesive can be made. This will allow you to achieve maximum savings. The presence of defects, on the contrary, requires the use of more adhesive to eliminate them.

The masonry technique and the level of skill of the builder play a certain role.Inexperienced workers often make mistakes and use too much compound to correct them. This does not improve the quality of the result, but the glue consumption increases.

The consumption of the mixture largely depends on the thickness of the seam the craftsman will make. The higher this indicator, the more glue will be spent on building a house.

Another factor is the presence of a reinforcing layer. Often, when creating aerated concrete walls for two-story and taller houses, builders use reinforcement. Then a thicker layer of glue has to be applied to the blocks. This increases material consumption.

It is not worth building an aerated concrete house in the rain. Water will get onto the blocks and into the glue container. This will reduce the quality of construction

Also, the consumption of the composition largely depends on the temperature and weather conditions. The hotter it is outside or in the room where the wall is being built, the more glue will be consumed. This is explained by the fact that the evaporation of the mixture increases.

Approximate glue consumption in different cases

It is important to take into account all the nuances when calculating the amount of glue consumption for laying aerated concrete blocks. This will allow you to determine as accurately as possible how many kilograms of dry mixture will need to be purchased to build a house.

The table below shows the glue consumption depending on the thickness of the seam and the brand of the composition.

The approximate consumption of glue depending on the thickness and density of aerated concrete blocks is given in the following table.

These consumption indicators are relevant for cases where the thickness of the adhesive layer does not exceed 1-2 mm, and the blocks do not have significant defects in terms of geometry.

Secrets of economical spending

If you follow some expert advice, the use of adhesive when laying aerated concrete will be more economical.

Experienced master builders know how to work with aerated concrete and glue. Therefore, they build a house faster and more economically in terms of material consumption. When constructing a building from aerated blocks on your own, you need to be careful and think through everything carefully, do not rush

The use of special tools speeds up the construction process and minimizes the use of glue, and, accordingly, reduces the cost of work. It is recommended to use a ladle, a rubber hammer, a square, a grater with sandpaper, and a saw for masonry.

The glue should be applied with a spatula or a special spatula. Then the composition will apply more evenly and it will be possible to minimize its consumption. Before laying, the blocks must be cleaned of dirt. It is important to dry them well so that they are not wet.

Tips for choosing adhesive mixtures

The range of adhesives for aerated concrete masonry on the market is quite extensive. All compositions are divided into gray and white. The first ones are considered universal. They can be used at any time of the year. They contain additives that increase frost resistance. This glue has certain temperature limits for use.

White compounds are suitable for work in the warm season. They contain Portland cement. This substance gives the mixture a light tint. White glue should be used for laying blocks indoors. The seam is aesthetically pleasing and does not require additional processing.

Typically, a gray type of glue is used to build aerated concrete houses. This is explained by the fact that this composition is universal and is more often found on sale.

Adhesives for aerated blocks from the following companies are very popular: Ceresit, Kreisel, UDK, Ytong, Real. Products from new companies appear on sale regularly. Therefore, not all builders can comment on the quality of a particular brand of glue. A little-known mixture for laying gas blocks can be no worse in quality than branded products.

Due to the wide range of adhesive compositions for aerated concrete blocks, many have problems with choice. The question of which glue is best for building a house is quite relevant. There are different ways to figure out which mixture to use.

Experts advise paying attention to the composition. It should contain a lot of binders and a minimum concentration of additional inclusions, which are used to reduce the cost of products. The choice is made through testing and comparison.

Builders recommend purchasing 2-3 types of glue in quantities of up to 1 kg and testing their quality in practice. The solution should be prepared according to the manufacturer's instructions. Next, glue two blocks together with each mixture. Leave to harden for a day. A day later, try to break the structure in the seam area.

You should purchase glue for laying gas blocks from reliable companies. It is better to choose well-known and proven brands. This guarantees high quality mixture

The result will show how good the glue was used. If the fracture site coincides with the seam, then it is better not to use this mixture. If only the aerated concrete block was damaged, this indicates the high quality of the glue.This composition can be safely used for any type of work.

If the fault partially touches the seam, this means that the adhesive mixture will not provide sufficient strength to the structure, so it is better not to use it, especially when constructing multi-story buildings.

Another way to determine the quality and choice of glue is to check its weight after hardening. It is necessary to buy several types of adhesive compositions for testing and pour them in equal quantities into containers of the same size.

Wait a day and evaluate the result. To do this, you need to weigh each of the containers. Preference should be given to the glue whose weight decreased the most after hardening. This indicates that a lot of moisture has been removed and the composition has become more durable.

If you bought glue of an unknown brand, then it is better not to start building a house using it until the quality is checked. It will be more difficult to correct the situation later

Testing glue using the above methods is troublesome, costly in time, effort and money. But such a check will help to accurately assess the quality of the composition. After all, manufacturers' promises do not always correspond to reality.

It makes sense to carry out testing when planning large-scale construction. This will help not only check the quality of the glue, but also more accurately calculate its consumption.

Conclusions and useful video on the topic

How to save glue when laying gas blocks:

Testing different types of glue for strength:

It is not difficult to determine the adhesive consumption for laying aerated concrete blocks. You need to use the formula and take into account all the factors that may affect this indicator.

If you have doubts about independently accurately calculating the amount of adhesive consumption, it is better to consult with an experienced specialist. He will tell you how much mixture will be needed and how best to lay it for maximum savings.

If you have experience in determining the adhesive consumption for the construction of aerated concrete structures, you can recommend a high-quality composition, then share this useful information. Leave comments using the special form below.