Где не рекомендуется применять газобетонный блок

Where it is not recommended to use aerated concrete block

Where it is not recommended to use aerated concrete block ⠀
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A separate and short section should consider areas where the gas block is not recommended. ⠀
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❎ Aerated concrete should not be used: ⠀
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❌ in the manufacture of stoves, fireplaces, chimneys ⠀
❌ for laying walls of wet rooms (baths, pools) in frosty climates ⠀
❌ for masonry walls below the ground and walls in contact with the ground ⠀
❌ in masonry walls in contact with sulfate and saline soils ⠀
❌ for construction in earthquake-prone areas (without special conditions) ⠀
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Conclusion: ⠀
Conclusion One thing suggests itself - aerated concrete is a modern and reliable material that is successfully used in private and commercial construction of houses. ⠀
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⚠ The gas block will be an excellent material for the home, if operated correctly. ⠀
If you have not yet decided on the wall material, then weigh the pros and cons and decide whether aerated concrete is suitable for your home. ⠀

Источник — FORUMHOUSE

О газобетоне

About aerated concrete and low temperatures

The most common claim to building material is its destruction in cold weather. There are such cases, but you cannot blame the stone here, as gross errors are made when working with it. ⠀
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💧 Concealed aerated concrete is delivered to the construction site with excessive moisture, and it begins to dry when the walls are already built. And also, when laying, moisture from the solution gets into the gas block. Many masters when working with a gas block spill it with water for better setting, and this water is inside the wall. ⠀
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If you do not let the wall dry and trap moisture inside, then you should expect unpleasant consequences. With the onset of frosty weather, such a wall will freeze, turning water into ice, which will lead to delamination and destruction of the outer part of the structure. Locking moisture inside the wall is one of the main violations of the rules for the operation of aerated concrete. ⠀
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☀ The masonry can be considered dried up and ready for further finishing after at least two seasons. Before the expiration of this period, it is not recommended to make repairs or finishing works that affect the vapor permeability of the walls. ⠀
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The following factors lead to moisture blocking inside the wall: ⠀
🔸 plastering external or internal walls with stucco with low vapor permeability; ⠀
🔸 finishing of damp walls with a siding facade; ⠀
🔸 pasting of dry walls with vinyl wallpaper; ⠀
🔸 lack of ventilation in the first years of operation; ⠀
🔸 waterproofing the damp wall; ⠀
🔸 incorrect window design (lack of window sills). ⠀
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Another common mistake in the operation of new gas-block houses is the lack of ventilation or proper ventilation. Living does not do without the use of water, and water, as usual, leads to the formation of steam, which complements the moisture of the walls. In turn, excess moisture at a temperature difference in cold weather will climb outside, which will lead to its accumulation on the outside of the wall. What happens from her contact with frosty air is known. ⠀

Источник — FORUMHOUSE

Сильные и слабые стороны газобетона

Strengths and weaknesses of aerated concrete

The gas block has a number of advantages and disadvantages that must be considered when choosing a wall material. ⠀
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💎 Benefits ⠀
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✅ Lightness. This parameter allows saving on the foundation, since the mass of the aerated concrete house will be significantly lower than the weight of a similar brick building. ⠀
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✅ High thermal insulation. The gas block house holds heat well, which saves on heating in the winter and cooling in the summer. Compared to solid brick, aerated concrete keeps heat 4 times better! ⠀
✅ Geometry and ease of handling. The gas block has a large size compared to brick, which allows you to quickly build walls. Accurate geometry provides savings on mortar, and the easy-to-process stone structure speeds up the construction process. And also the exact geometry reduces the amount of mortar in the joint, which reduces the likelihood of cold air entering the room. ⠀
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✅ Fire resistance. Gas blocks do not burn, do not emit toxic substances when heated, and are able to withstand the effects of an open flame for two hours, without losing their carrying capabilities.
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✅ Durability. The gas block is not susceptible to decay, the effects of fungus, is not food and housing for rodents and insects. With proper operation, a house made of aerated concrete will last more than 60 years. ⠀
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🚬 Disadvantages ⠀
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❎ Low bending strength. This quality is a drawback and makes the gas block fragile and unstable to uneven loads. ⠀
❎ Moisture absorption. Unprotected aerated concrete absorbs up to 20% moisture from its own weight, which reduces its thermal insulation properties, and in frost it can lead to destruction of the outer layer. For this reason, the facade of the house is recommended to be protected from precipitation. When insulating the facade, the vapor barrier properties of the exterior finish should be taken into account and condensation should not be allowed to form in the unit. ⠀
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❎ Low breaking resistance. The gas block cannot be used for rooms where valuables are stored (ticket office, weapons room, remote garage). ⠀

Источник — FORUMHOUSE

О хрупкости газобетона

On the fragility of aerated concrete

The aerated concrete block is a large-format building material, and it needs a stable foundation that does not exceed the relative difference in sediment of more than 0.002. That is, no more than 2 mm per 1 meter of the foundation. Such deformation is permissible and will not cause cracks in unreinforced masonry. ⠀
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🕋 It is recommended to build a house of gas blocks on a monolithic strip foundation or slab. It is also allowed to build on a prefabricated foundation of FBS, but with the obligatory presence of a monolithic strapping belt on top. In simple words - you need to ensure the immobility of the foundation. ⠀
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Given the light weight of the gas block, it is possible to build a house from this material on shallow foundation: tape or slab. Here, one peculiarity should be taken into account - the influence of heaving soils on the foundation should not be allowed.
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To ensure the stillness of a shallow foundation, a pillow of non-porous material should be made under its base: ⠀
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🔸 coarse sand ⠀
🔸 crushed stone ⠀
🔸 gravel and sand mixture ⠀
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If the soil on the site is saturated with groundwater, then you need to make a drainage that will divert water from the pillow. ⠀
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It should be understood that the dry pillow is not exposed to frost heaving. And in the presence of moisture in the cushion and freezing of the soil, the foundation will move and thereby destroy the aerated concrete wall. ⠀
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The factory gas unit is divided into three types: ⠀
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🔶 structural ⠀
🔶 structural and heat-insulating ⠀
🔶 heat insulating ⠀
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Each species has its own bearing capacity and density. If, without understanding the issue, put a heavy ceiling on the insulating gas block, then the wall will begin to collapse. ⠀
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⚠ For the above reasons, aerated concrete is unreasonably criticized. ⠀

Источник — FORUMHOUSE

Преимущества и недостатки газобетонного дома

Advantages and disadvantages of aerated concrete house

How to determine if aerated concrete is suitable as a wall material for your home? ⠀
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Is aerated concrete house good or bad? This is the question most often asked builders by customers. The builders, in turn, respond in the way that suits them, but the truth does not come out of this. To answer the question, let's take a sober look at the strengths and weaknesses of the aerated concrete block and determine: for which houses this material is suitable. ⠀
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😡 Because of what they scold the aerated concrete block ⠀
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On the Internet, there are many articles and videos exposing aerated concrete. The main claims against the material are destruction from exposure to low temperatures and fragility, causing cracks in the walls. In some videos, you can see how aerated concrete collapses under the pressure of floor slabs. Is the material to blame, not the builder? First things first. ⠀
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⛓ Aerated concrete - technological material and is a type of cellular concrete. This type of artificial stone is made using blowing agents, and it gains strength in an autoclave under the influence of high pressure and steam treatment. In simple terms, aerated concrete is a foamed hardened concrete, inside of which air pores are formed, giving the material lightness, and high heat-insulating qualities. ⠀
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🔬 In this case we are talking about autoclaved aerated concrete, which is recommended for construction. The fact is that there is also a non-autoclave aerated concrete block, which can be made artisanally. It is such a block that causes many troubles, since the production technology is not fully respected in artisanal industries. Such a unit, unlike the factory one, is always far from the declared characteristics and has a broken geometry. ⠀
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⚠ Like any technological material, aerated concrete is demanding to operate. When using this building material, you need to know the areas of its application and the factors leading to its destruction. ⠀
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