Plaster for cellular concrete: how to choose

Your wall’s durability and appearance can be greatly affected by the plaster you choose for cellular concrete. Because of its insulating qualities and light weight, cellular concrete needs a particular kind of plaster to provide a strong bond and durable finish.

We’ll go over the things to think about when choosing plaster for cellular concrete in this guide. We’ll cover everything you need to know to make an informed choice, from comprehending various plaster types to evaluating their suitability with cellular concrete.

You can achieve a smooth, polished finish and improve the functionality of your walls by selecting the appropriate plaster. Let’s explore the important factors to think about to make sure your project turns out exactly how you had envisioned.

Brief information about cellular concrete

Knowing the properties and features of the material you are working with is essential when organizing the construction of a house out of cellular concrete blocks. After all, advertising, which provides a wealth of information to the public, functions as a "engine" for trade rather than construction.

It’s evident that the cellular blocks are affordable and lightweight, and the homes built out of them are both cozy and sturdy. But you must make an effort to avoid making mistakes so that it actually is. Whether you employ a brigade or handle the task yourself with your own hands, specialists can occasionally turn out to be so-so.

Porous blocks: what"s the difference

The structure with evenly distributed small pores—which is very evident in the picture below—is what gave aerated concrete its name. There are advantages and disadvantages to the thickness of the cells in this building material that need to be considered during the work.

• This is a separate group, related to the category of lightweight concrete. The solutions included in it are made from finely dispersed silica fillers, binders, pore-forming additives. This group includes several types of concrete, differing in composition and manufacturing technology. They are classified according to various indicators, and above all, according to the conditions of hardening.

Kindly take note! The first category includes autoclaved concrete, which requires the creation of a saturated steam atmosphere at high temperatures and pressures. The well-known gas blocks, gas silicate blocks, and foam blocks fall into this group.

• Non-autoclaved concretes include the so-called ash concretes, for which granulated materials are used as filler: blast furnace slag, expanded clay, agloporite. Such products do not harden in autoclaves, but in steam chambers, or using electric heating. In this case, the air pressure is normal, and the temperature is half that in an autoclave – only 90, maximum 100 degrees Celsius.

• The second feature by which cellular concrete is classified is the technology of pore formation. This is either gas emission, in which the pores are open, or foaming – the pores in such concrete have a closed structure. This affects the degree of moisture absorption by the product, and should be taken into account when laying and cladding walls.
• Autoclaved concrete is also classified by the type of binder used. There are purely cement options, for example: aerated concrete. If cement is combined with quicklime, then this is already aerated concrete. There are options where instead of lime, additives from finely ground blast furnace slag are used.

Crucial! In some cases, the lime or slag used to make foam concrete takes the place of cement entirely. Cement-free products have the lowest strength indicators, which are based on the cement content. These blocks can also be used as thermal insulation material. They are designed to be used in the construction of non-load-bearing enclosing structures, such as interior partitions and balcony parapets.

• Therefore, before plastering cellular concrete, you need to know exactly which type of blocks was used for laying the walls. It is clear that cement-free blocks are cheaper, and this attracts those for whom savings always come first.
• We will not talk now about what can happen if they are used to build load-bearing walls. But even if these are internal partitions, when plastering, you need to keep in mind that in this case, cement-based solutions cannot be used.
• This is the main axiom that is followed in construction: the strength of the covering layer cannot be higher than the strength of the base. In accordance with it, masonry made from cementless foam blocks cannot be tiled, since the glue is always cement-based. Non-autoclave concrete is mainly made on the basis of cement, so there are no such problems with them.

• The advantages of products made from cellular concrete have already been said, but we should not forget about the disadvantages. In addition to the fact that they practically “drink water”, they are characterized by weak crack resistance and significant shrinkage. It can last up to 240 days, so in such houses even windows are not installed right away – let alone plaster! It is best to perform it at least six months after the walls are erected.

If expediency is required, electric heating must be used to heat the masonry; additionally, finishing should not begin in the winter. Additionally, you must follow the correct sequence of work: you must finish all interior wet processes entirely before starting on the facade. In this instance, the order of work is unaffected by the kind of external finishing.

Selecting the appropriate type of cellular concrete is essential for plastering in order to achieve a smooth, long-lasting finish. The important things to think about, such as plaster types, application methods, and how to guarantee strong adhesion and longevity, will be walked you through in this article. Gaining knowledge of these fundamentals will enable you to make wise choices and achieve the greatest outcomes for your endeavor.

Your wall’s durability and appearance can be greatly affected by the plaster you choose for cellular concrete. Choosing a plaster that offers a smooth, long-lasting finish and adheres well to the porous surface of cellular concrete is crucial.

Take into account elements like the plaster’s flexibility, drying period, and moisture resistance. You can prolong the life of your walls by using a plaster that can handle the special qualities of cellular concrete.

You can improve the overall quality of your wall decoration and steer clear of common problems like peeling or cracking by taking your time when selecting the plaster. The correct product will make your walls look fantastic and function well in a variety of situations.

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