Adhesive foam for aerated concrete is an indispensable product in construction. Before buying this adhesive, it is important to familiarize yourself with the main features of the foam. The recommendations of specialists will help you make the right choice.
For reliable adhesion of aerated concrete blocks to each other during masonry use various adhesives. Among the most common materials:
- Glue. This refers to a special, specially designed for these types of work, which has the necessary properties.
- Cement-sand mortar. It is used as a classic, proven option.
- Polyurethane adhesive foam.
Foam composition
Among all the above, special adhesive foam for aerated concrete is the most modern and reliable substance. The right choice and operation guarantees a clean, even, reliable laying of aerated concrete blocks . It is plastic, dries quickly and does not shrink.
By default, the list of required ingredients includes the following components:
- fine, previously washed and sifted sand;
- modifiers that serve to retain moisture;
- a binder - Portland cement, giving the necessary consistency;
- polymer additives that enhance bonding properties.
Other components are possible. But they do not form fundamental characteristics, but enhance or give the adhesive additional properties. Some additives enhance thermal conductivity, while others increase resistance to low temperatures.
Performance characteristics of all types of glue
The performance of a particular composition may vary. For example, solidification can occur within an hour. The maximum figure in another embodiment is 4 hours. Other indicators have similar variability:
- The exposure time of the composition: from 10 to 20 minutes.
- Minimum required layer thickness of the substance: from 1 to 8 ml.
- Temperature range at which work can be carried out: -25 - +35 ° C.
These points need to be paid attention to when choosing adhesive foam for aerated concrete. It is necessary that they comply with real conditions and construction requirements. If this stage of work fell on the winter period, then the glue must be bought frost-resistant with minimal requirements for the coating layer. In this case, it will not hurt to be informed about the types of glue.
There are three main types. The so-called gray glue-foam for aerated concrete "Titan" refers to frost-resistant. This species is considered universal. It is mainly used for outdoor applications. It has proven itself in all weather conditions.
Another type is white glue. Its use eliminates the need to close the seams during interior decoration, since the composition is similar to the building material and the wall has a uniform color.
Among builders, polyurethane foam is most respected. It has many advantages. Therefore, its popularity is justified. It is no coincidence that glue is used everywhere. Adhesive foam for aerated concrete provides reliable masonry with minimal consumption.
It is sensitive to ultraviolet light, which adversely affects the structure. Therefore, the use of glue-foam obliges to take this factor into account.
Substance consumption
The consumption of adhesive foam for aerated concrete can easily be calculated. For a preliminary calculation, they are repelled from the total amount of aerated concrete converted to cubic meters. One cubic meter on average consumes one and a half bags of adhesive in dry form: about 38 kilograms. Practical experience runs counter to manufacturers' assurances that no more than 25 are required.
The geometry of the blocks is an important indicator, which should also not be overlooked in preliminary calculations. The smoother the surface, the lower the consumption of bonding material.
Adhesive Tools
Aerated concrete is laid on glue-foam using special tools. Strictly speaking, consumption even depends on the tool used to prepare the mixture and apply it to the blocks. Experts recommend a carriage as a convenient fixture. This is a professional tool. With skillful use, it will greatly accelerate the work. The design of the carriage itself provides the application of glue in one even layer.
Different types of carriages are provided for different gas blocks.
Do not forget and neglect such details as gloves and a respirator. The cement included in the adhesive makes you think about the safety of the respiratory system and exposed areas of the body.
To ensure long-term storage, if necessary, glue should be placed in a heated room with low humidity.
The benefits of such a foam
The main advantage of adhesive for aerated concrete over cement mixes is the similarity of its structure with building material. This provides fast walling speeds. A low price - low cost. As a result, the profitability of the building, when it comes to a commercial facility. Well-known manufacturers of building mixtures keep the bar at the lowest possible level. It is approximately 200 rubles per bag (25 kilograms).
Builders Recommendations
It is advisable to buy adhesive foam for aerated concrete from trusted suppliers. Particular attention should be paid to the duration of the product. If the buyer does not know which foam to choose, then you should contact the construction company for help. Employees of the company will provide free advice on issues of interest. In the event that a large batch of product is needed, it is better to purchase a few units first, after which you can safely buy the rest.
The use of modern adhesive mortar is profitable, practical, quick and cheap, in comparison with cement and other variations based on sand.
Glue-foam occupies the highest step of the pedestal, as it relieves the construction of the "wet" processes. It is economical, reliable and fastens aerated concrete blocks together incredibly tenaciously. Adhesive foam has earned the respect of professionals for its ease of use and its performance. Many beginner builders do not know why many use adhesive foam for aerated concrete. Reviews of professionals indicate that this adhesive provides thinness of masonry and reduces heat loss of the building.