The best glue for aerated concrete and foam concrete - how to choose the right one? Tips + Videos

Aerated concrete is considered a good quality material, which is intended for the construction of buildings and outbuildings.

A special adhesive is required for its installation.

The amount of adhesive mixture must be calculated accurately. We'll talk about this later in the article.

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Aerated concrete adhesive

In order for aerated concrete masonry to be of high quality, aerated concrete blocks must be laid using special glue. Masonry mortar differs from cement in its quick preparation and ease of use. The glue is used only for solid blocks with precise geometry.

Characteristics of quality

The advantages of special adhesive for aerated concrete are as follows.

• Due to the fact that the adhesive mixture has fractional sand and Portland cement, the layer thickness can be varied from 2 to 3 mm;
• The property of the glue to fill the entire space and thereby increase the bonding properties;
• Five and a half liters of water will be enough for a 25 kg bag;
• Seams do not crack due to good moisture retention;
• Poor thermal conductivity;
• Good plasticity, moisture resistance, frost resistance, good adhesion to the material;
• The setting time of the composition is very short;
• The adhesive mixture hardens without shrinkage;
• The adhesive composition may be used as putty;
• Compared to conventional mortar, the final cost of aerated concrete adhesive is low;
• Very little waste remains;
• The glue is simple and easy to use.

Calculation of the amount

This calculation is suitable for a flat surface. Based on this, the consumption per cubic meter should be approximately 15 to 30 kg.

For one square meter, the average consumption of glue is 25 kg, that is, one bag.

The above figures are theoretical calculations.

In practice, completely different results are obtained, for example, 1.5 bags per cubic meter.

This difference is influenced by the following:

1. The quality and availability of the tool used;
2. Expertise of the craftsman;
3. Surface condition products;
4. Meteorological conditions;
5. The number of reinforcing layers.

These facts must be taken into account before calculating the adhesive consumption.

Recommendations for application

1. To approximate the standards, it is necessary to apply a layer of glue mixture in a smaller layer, in this case the aerated concrete laying will be smoother. A thin layer of glue ensures the durability of the masonry.
2. One of the main criteria is the correct preparation of the adhesive composition.The dry glue base and water are mixed with a drill, with a nozzle or with a special construction mixer.

3. Use only room temperature water for the adhesive mixture.

Selecting glue by season

The adhesive composition should be chosen, depending on the season.

For winter use frost-resistant concrete glue.

It contains antifreeze additives in its composition.

This mixture is kept warm and kneaded using hot water.

The finished mixture is taken out into the street in an insulated container and under a lid.

The adhesive must be applied fairly quickly.

In its composition, glue for aerated concrete should have:

1. Portland cement;
2. Sifted fine sand;
3. Polymer additives;
4. Additives - modifiers.

Tools for work

To make the consumption of glue as economical as possible, it is necessary to use the following tools:

• Bucket for applying adhesive;
• Rubber hammer;
• Saw with tungsten carbide teeth;
• Drill with mixer head;
• Mixer paddle;
• Manual chasing cutter;
• Angle 90 degrees;
• Grater with coarse sandpaper;
• Grater with metal teeth.

Tips on the aerated concrete laying process

The block must be cleaned from dust, grease and other contaminants.

Excessive humidity of the aerated concrete block must not be allowed.

Apply the adhesive with a notched trowel or carriage. After applying the glue, it should harden, and only then the excess is removed.

Adhesive mixtures have an advantage over sand-cement mortar.

Consumption of the adhesive composition depends on many factors, they must be taken into account.

Hire professionals to avoid making mistakes.

But only hire already proven specialists.

It is necessary to check that all the tools for preparing and applying the aerated concrete adhesive are available.

It is necessary to purchase glue in advance that meets all available parameters.

In the event that you nevertheless decide to lay aerated concrete yourself, then it is better to do this in the warm season (summer) and follow all the available instructions.

Before starting work, carefully calculate everything, think it over and make a truly correct choice.

We wish you good luck in your endeavors!