Building materials of the porous structure are gaining popularity. They are durable and easy, used to build private houses, country cottages, economic and commercial buildings, garages. For this, foam concrete and aerated concrete are more often used, but you need to know what the difference between these two, similar to the specifications of concrete.
Foam concrete and aerated concrete - building materials that are gaining popularity because they have sufficient strength, low thermal conductivity. Porous structure reduces the density and mass of blocks made of them. Air filled cells explain thermal insulation. Despite the similarity of the characteristics, the scope of application of these compositions varies.
Strength, small density of foam concrete increases the service life of this material. Therefore, it is used for residential buildings - houses, cottages, household structures, baths. The only restriction in the use of foam concrete - buildings, erected from it should not be higher than three floors. It is used when appliance:
The uniformity of the structure of the aerated concrete explains one of its main features - increased resistance to cracking and shrinkage of structures created from it. This allows it to be used for the construction of household buildings, industrial, public and commercial facilities. It is used for:
To understand what foam concrete aerated concrete differences are different, it is necessary to understand the technologies for which these building materials are manufactured. In the production process, an internal porous structure is formed at the estimated density and strength - characteristics that determine the main advantages. It uses harmless components for health, which significantly expands the scope of application of such concrete.
Foam concrete is made by simplified technology, affordable even at home. Components for production are: cement, water, sand, slag and other fillers. The basic substance - ensuring the porosity of the material structure - sulfite liquor. For foam concrete, portland cement 36%, sand 47%, 16% water. Foaming additives and fiber to increase strength do not exceed 1%. Stages of production:
It is important to pay attention to the quality of the formwork so that the size and surface of the blocks or structural elements meet the technical requirements.
Aerated concrete is manufactured by industrial enterprises with special equipment. Cement, quartz sand and lime, water are used as the main components. Foaming component - aluminum paste. The composition is similar to what is used to prepare foam concrete. Clean substance carries environmental danger, but in the production process it is completely neutralized. Stages of production of aerated concrete:
The resulting aerated concrete and materials from it have increased strength, right geometry.
The main components and production technology are largely similar, but specifications These materials are different. The difference between the properties of foam concrete from aerated concrete is due to their structure and type.
Foam concrete is structured relatively large cells with low absorption of moisture, good sound and thermal insulation. The surface is relatively smooth, the color is gray.
The aerated concrete has smaller cells, as a result of gas formation in the thickness of the solution, microcracks may appear on the surface. Have good water and vapor permeability, heat insulating characteristics. A rough white surface requires additional finishes.
The density of aerated concrete is found within 400 to 800, foam concrete - greater density from 400 to 1200 kg / m³. Differences in other technical specifications:
If we compare the indicators of foam concrete and aerated concrete, the aerated concrete has the best indicators that allow its use to build various buildings and structures, including multi-storey.
Aerated concrete and foam concrete possess their advantages and disadvantages. What better to use in specific situationcan only be determined after analyzing the properties of these materials. Among the advantages of foam concrete:
But this material has disadvantages:
The advantages of aerated concrete include the following characteristics:
With all the merits of the material, it also has shortcomings:
Choosing foam concrete or aerated concrete need to weigh what is better for construction. These materials have a lot in common, but there are differences that do not allow them to apply them equally. Obviously, the aerated concrete has the best performance indicators, according to other characteristics they are similar. Therefore, specific calculations, features and budget works are taken into account, resulting in a decision.
When building a house it is important to choose the materialwhich will be strong enough, easy and at the same time can keep warm in the house. Among building materials For private construction, gasoblocks and foam blocks are the most popular. The difference between them, at first glance, is insignificant, but their technical indicators differ significantly.
Foam concrete and aerated concrete belong to cellular concreteAnd they have a similar structure. But thanks to various raw materials and production technology, cellular blocks have different properties and specifications. Weighs the difference of the gasoblock from the foam block it is important for the correct choice of building material. The difference between them should be carefully studied.
The main indicators for which these building materials are distinguished for the convenience of analysis are reduced to the table.
| Technical indicators | Foamclock | Gasoblock |
|---|---|---|
| Color | Grey | White |
| Surface structure | Smooth | Rough |
| Mark by density | 700, 800, 900 | 350, 400, 500, 600, 700 |
| Strength | Class B2.0 at D800 | Class B2.0 at D500 |
| Durability | 70 years old | 50 years. Since that modern material There was no possibility to check the experienced way |
| Parp permeability | Below | Above |
| Thermal conductivity | Above, but in the case of this indicator, it is a disadvantage of the walls of the house | Below |
| Masonry | Masonry on cement-sandy solution with a seam thickness of 10 mm is performed. This contributes to the formation of cold bridges | Masonry gasoblokamiperformed on special glue. The seam thickness is 1 mm, which eliminates the formation of cold bridges |
| Geometrical parameters | Production is performed in forms and deviations can reach 5 mm. | The autoclave gasoblock is cut on modern equipment and the deviation of the sizes from the norm is ± 1 mm |
| Shrinkage | 3 mm / m | The shrinkage process passes in the autoclave, so it does not exceed 0.1 mm / m | Because of the greater weight load on the foundation above | Below |
| Ease of performance | More difficult, due to more weight | Easier, because It is more convenient to work with lightweight material. |
| Soundproofing | Below | Above |
| Ease of processing | More difficult | Due to the lower density of the material, it is easy to saw |
| Ecology coefficient | 4 | 2 |
| Moisture resistance | Above | Below |
| Frost resistance | Below | Above |
| Fire resistance | High | High |
| Cost | Below | Significantly higher |
Foam blocks are made of foam concrete, which forms by mechanical mixing concrete mix With foam. Thus, the weight of the material is significantly alleviated. Pores of foam blocks are closed, which contributes to the suspended moisture resistance.
Component components of foam blocks:
Specifications:
Advantages of foam blocks:
Their disadvantages:
Gas blocks are made in autoclaves from aerated concrete. It is formed due to the chemical reaction, as a result of which gas is distinguished. In the structure of the aerated concrete, a plurality of fine cracks are created under the exhaust gas, so such material passes air and moisture.
Building blocks from subspecies of cellular concrete - gas and foam concrete - have been successfully competing with such construction monsters as concrete, brick and wood. It is due to its physico-operational characteristics, and from the advantages, and from shortcomings, large companies and private developers have not yet decided that it is better than foam or aerated concrete, although in many respects they are similar.
The strength of these masonry products is inferior to similar parameters of bricks and concrete, but on thermal conductivity they have no equal, and for low-rise construction, it is preferable to choose a foam concrete or aerated concrete and more economical than to build a house of hardening materials. An important role in choosing mesh concrete It plays a small weight of block products, allowing to alleviate the design of the foundation - and foam concrete and aerated concrete have a porous structure. A combination of low cost, efficiency, high energy saving and sufficient strength - these whales that are based on the popularity of such modern building materials such as aerated concrete or foam blocks.
From aerated concrete blocks, panels and slabs, carrier and non-relaxing walls are erected, internal partitions and auxiliary architectural structures. The solution for the manufacture of building elements is prepared from portland cement of high brands (not lower than M 300), lime, purified fine sand, blast or coal slags, other production waste.
The gas-generating substance is the aluminum powder, which, when reactions with lime, when water is added, begins to foam, highlighting hydrogen. Hydrogen bubbles do not have time to completely exit the solution, since the reaction occurs under action high temperatures, and the remaining hydrogen forms a cellular structure of aerated concrete suitable for construction.
To better understand what the differences between foam and aerated concrete, you need to get acquainted with the technology of their manufacture. High-quality gas blocks with a handicraft method cannot be manufactured due to certain complex conditions occurring in the process of molding blocks in the autoclave.
Porosity is a plus, but in certain cases it can play a bad role, for example:
The optimal use of gas-block structures and structures is in low-rise construction in the construction of internal bearing and non-rigorous walls, interior partitions, complex architectural elements (arches, niche), as well as enhancing the thermal insulation of the premises. Block products are used for walls and partitions, panel - to create a heat insulating layer between the walls and partitions and directly by the room.
As a product of modern construction technologies, and foam concrete and aerated concrete are very similar to each other and are subspecies of lightweight cellular concrete. The composition of solutions is very similar, but the methods of processing the working mixture are quite different. The main difference is the foam concrete with the help of a mechanical process (in barorestation using a foam generator), aerated concrete - autoclave chemical method.
The generalized answer to the question is that better: foam blocks or aerated concrete products, the answer is one - foam concrete structures are used in construction in a more advanced range of opportunities, including the construction of external walls with a sufficient degree of strength. Aerated concrete applied in more specialized architectural structures, but more responsible for characteristics.
It is blocks, not the panel or stove, are more in demand, as the walls in low-rise walls are erected multi-storey housesAnd from foam blocks you can build partitions inside the house. Frequent use of foam materials for decorative and complex architectural design is justified by ease of their mechanical processing.
Foam concrete in the form of a solution is used for fill flat roofs, outdoor screeds, for thermal insulation of any engineering communications, etc. Foam concrete high grades for strength is well withstanding weight loads, it works as a foundation for low-rise buildings erected from lightweight materials.
All types of cellular concrete, including foam concrete and aerated concrete, in many special cases can replace brick structures, most often internal. When choosing building materials for the house, remember: aerated concrete is stronger, and foam concrete has a wider area of \u200b\u200buse, the surface of the foam concrete product is not open to the moisture ingress, which ensures increased thermal insulation. In the production of foam concrete cheaper.
Who is better foam concrete and aerated concrete Updated: January 16, 2017 by the author: Artyom
In the segment of cellular concrete, two popular materials compete - foam concrete and aerated concrete. Planning the construction of the house, cottage, garage or bath, each owner tries to take into account all the nuances, to predict various situations, Frequency cost, in general, create the most real plan, before you start work.
The first and important task is the choice of material for bearing walls. What is better to build a house, foam block or gas block? About each of them has its own both positive and negative feedback.
Foam concrete or aerated concrete - what is better for building a house
Cellic concrete is a group of building materials made from concrete and various additives that give it a porous structure. The most famous representatives of this species are aerated concrete and foam concrete.
At first glance, these are identical materials. However, there are differences that form distinctive properties that are a stumbling block between supporters and opponents of these materials.
To make an objective conclusion and right choice We offer to familiarize yourself with what the gasoblock differs from foam block is a comparison of characteristics, properties and price. To do this, we will study all the stages of the life cycle of these wall materials, starting with technological process production, finishing decorative finish. We will conduct a full comparative analysis.
Pros and cons of houses from aerated concrete + owners reviews
Pros and cons of houses from foam concrete + owners reviews
Advantages and disadvantages of foam concrete blocks + which choose
Comparison that is better: foam blocks or gas blocks
Comparison in the framework of manufacturing technology (production)
Both materials are manufactured by mixing concrete with materials that report to it a porous structure.
But, in the production of foam concrete, such material (the foaming agent, plasticizer) is a resin wood washed (DDO), and aerated concrete - dust aluminum.
Foam concrete is made in the form of separate blocks. In this regard, the type of sizes and species is limited.
Aerated concrete is made in the mass, which, after frozen, is cut into blocks of a given value and configuration. Thus, a greater geometric diversity of elements in dimensions is achieved.
The gas chamber is made only in the factory conditions on specialized equipment.
Foam concrete can be manufactured in small enterprises (mini-plants, installations, handicraft, private production).
In view of the peculiarities of the production of pores on the outer surface of the gas-concrete block remain open, which makes it look like a sponge. During the day of staying in the water, aerated concaves is gaining up to 47% moisture. Those. It gets harder almost twice. Material unprotected before exposure to moisture or precipitation. If you add to this frost, the unprotected wall of aerated concrete will quickly cover the grid of small cracks, which can be eliminated in different ways.
Pores of the foam concrete block are closed all over the entire mass. This gives it hydrophobic properties. Foam concrete is like a float - will stay on the water for a long time.
As the user tests show - the surrounding (dreamed strength) during the month foam concrete (recommended time) is able to hold onto the surface of water for more than a month.
Parallel comparison within the properties and characteristics of the material
Pores of foam concrete and aerated concreteAluminum powder or paste, distributing on a gas-concrete mixture allows you to get the same bubbles in its size - pores.
In foam concrete pores of different types (volume). Material prepared for site www.moydomik.net
The same foam concrete and aerated concrete ranges from 300 to 1200 kg / m. Cube and depends on the brand. For example, the brand D 500 has a density of 500 kg / m. Cube with the natural humidity of the material;
The weight of cellular concrete also depends on the brand. For example, 1 m.Kub. The material of the brand D 500 will weigh 500 kg.
The aerated concrete is the same throughout the volume of the block, in foam concrete is inhomogeneous, which is due to the specificity of the distribution of the foaming additive.
In addition, foam concrete and aerated concrete are distinguished by low bending strength. This will push additional requirements To the foundation device and its ability to provide form stability of the house (prevent uneven shrinkage).
Aerated concrete has a maximum density (corresponds to the brand) in the early stages of manufacture. In the process of storing gas blocks or operation of the structure, it decreases.
Foam concrete, you need at least 28 days from the date of production, in order to exit the declared density indicator. This makes special conditions for the beginning of construction work.
To make sure that the block gained strength, it is better to purchase it in advance and keep on the construction site. Otherwise, the design, built of freshly manufactured foam concrete, will give a significant shrinkage. It is worth noting that foam concrete is gaining strength as they use. Those. Than the older the block or the house of foam concrete, the stronger.
Due to the fact that the aerated concrete is cut, and does not poured into the formwork, its size is much more accurate. This contributes to the achievement of a smaller thickness of the masonry seam (2-3 mm) and the reduction of the area through which the heat goes out (cold bridges).
The thickness of the seam of foam block fluctuates in large limits and is 2-5 mm. To a large extent, the thickness of the seam is determined by the skill of the mood.
The ability to absorb water more in aerated concrete, due to the presence of open pores.
With the same density (block of block), foam concrete and aerated concrete is kept heat in different ways.
Aerated concrete protrudes the best thermal insulator than foam concrete. For example, a sufficient wall thickness for Moscow and Moscow region using the foam block of the brand D 500 will be 600 mm, when using aerated concrete, just 450 mm.
Comparison of the differences within the framework of the building process (installation, laying, processing)
Ideal, since both types of cellular concrete refers to the easy. However, unprotected aerated concrete blockAfter wetting it becomes harder almost half, which creates additional pressure on the foundation. Foam concrete does not possess such a feature.
Identical, thanks to the structure and composition, it is possible to make the necessary form using a conventional manual saw. Drill, stamp hole or groove (groove), also easy.
The small weight of both compared materials makes the construction process rapid and simple, compared, for example, with piece bricks.
For aerated concrete, you need to use a special adhesive mixture, it allows you to reduce the flow and provide a thin seam.
Foam concrete can be put on glue or sandy-cement mixture.
If you need to suspend or stop construction worksFor example, on winter timeMaterials need to be conservation. At the same time, the walls of the foam block will predict a certain period without problems, but from the gas block must be wrapped in the film so that it does not pull moisture. And in the protection of aerated concrete in any time of the year. Of course, in the summer it is not so critical, the wall of aerated concrete will dry over a week-other (whether it is worth interrupting the work for a long time?), Then in winter it is a wetting with the subsequent freezing-thawing may result in destruction;
Foam concrete can give shrinkage in the range of 1-3 mm / mp, shrinkage of aerated concrete does not exceed 0.5 mm / mp.
For both materials, you need to use special fasteners (hardware, screws, chemical anchors). They are designed specifically in order to fix in the walls of blocks with a porous structure.
Comparative analysis within finishing materials and work
For facing of aerated concrete and foam concrete walls (facade), you can use: siding, lining, plaster, ventilated facade.
Due to the fact that in the pores of the foam block and the gasoblock contains the air they are good heat insulators. Therefore, a house of aerated concrete or foam concrete does not need insulation (with sufficient wall thickness). If such a need arose or, for example, a bath of these materials was built from these materials, only a flexible insulation should be applied.
For foam concrete and aerated concrete, it is necessary to use special mixtures. The main advantage of plaster for cellular concrete is that it retains the ability to breathe. At the same time, the requirements for plaster for foam concrete consist also in the fact that the composition should have good adhesion to the surface.
A more porous structure of aerated concrete informs him a great adhesion to any plaster.
Foam concrete requires the use of reinforcement grid, so that the plaster keeps reliably. Alternatively, the masters advise to process the foam block surface with grater or sandpaper.
Foam concrete is cheaper by 20% of the aerated concrete of the same brand. It is cheaper, because Its production uses cheaper materials and equipment. The same leads to the appearance of a large number of falsified material.
However, when calculating the cost of construction should not take into account only the purchase price of blocks. You need to still take into account the price and consumption of adhesive mixture, finishing materials, the need for additional materials (fittings, reinforcing mesh, additional insulation, hydropobizats, etc.). Only after that it is safe to say that cheaper, aerated concrete or foam concrete.
The table compared the main parameters that determine the properties of gas-blocks and foam blocks. As a result, you can determine which material to choose for construction under specified conditions and requirements.
| Parameter | Foam concrete | Gasobutton |
|---|---|---|
| Powder-forming additive | resin washer washer (refers to moderately dangerous substances) | dust aluminum |
| Manufacturing technology | Casting blocks | Block cutting |
| Variety of elements | Less | More |
| Manufacture | Possibly handicraft production | In factory conditions |
| Pores | Closed | External - open, internal, for the most part, closure |
| Por sizes | dissolved | same size |
| Block sizes | ||
| height (thickness) | 200, 300, 400 | 200 |
| length | 600 | 500, 600 |
| width | 100-300 | 75-500 |
| Density, kg / mkub. | 300-1200 | |
| Weight, kg / mkub. | 300-1200 | |
| Compression strength, for the brand D500 | IN 1 | At 2.5 |
| Set of strength | Instant with further loss | Does not match the calculated, with further set |
| Accuracy size | Objectively existing errors | Minimal error |
| Moisture absorption | Lesser | More |
| Frost resistance, cycles | F-30. | F-25. |
| Thermal conductivity, W / m * to | 0.08 (thermal insulation) - 0.36 (structural) | 0.1 (thermal insulation) - 0.14 (construction |
| Appearance | Worse | It is better |
| Requirements for foundation | identic | |
| Easy installation, cutting, drilling | identic | |
| Requirements for glue mixture | Any | Only a special mixture |
| Protection of walls | Need not | Need |
| Shrinkage, mm / mp. | 2-3 | 0,5 |
| The ability to hold methies | identichna | |
| Material for finishing | Any | Allowing you to keep the ability to "breathe" block |
| Material for insulation | Preferably soft insulation (if necessary) | |
| Plastering | More difficult, due to the smooth structure of the block | Simple |
| Price, rub / M. Kub. | 2200-2800 | 3200-3500 |
As you can see, an unequivocal answer to the question, what is better, aerated concrete or foam concrete, there is no and can not be. Based on this table, it can be concluded that foam concrete and aerated concrete have significant differences that do not allow them to put them in one row. Despite this, the total conclusion will be: aerated concrete is the best indicators for strength, foam concrete for everything else. What criterion is more important, depends on the specific situation, the region and the budget for construction. Accordingly, everyone itself decides whether to build a house of foam blocks or gas blocks.
Tags: Foam concrete gas concrete Home construction
And the one and the other material is an artificial stone and refers to the group "Cellic concretes". It is for them that individual developers most often draw attention, since this type of construction is considered the most simple and budget. Unfortunately, most articles dedicated to the selection for the construction between aerated concrete and foam concrete, consider in detail only the characteristics of these materials, which implies "... Make the findings yourself."
Partly this is true. But in this article we will analyze some properties based on the expediency of using certain products in each case. After all, it is clear that General recommendations They will not be able to give answers to all questions. So we will try such "gaps" to minimize, and also simply dispel some myths, which are stuck with annoying advertising.
By the way, in many articles dedicated to the advantages and disadvantages of aerated concrete and foam concrete, there are points in which these materials "do not rot", "do not burn," do not "be corrosion, rodents" and the like. The analysis of such "properties" we will consciously miss, as it is simply incomprehensible to which audience a similar "valuable" information is calculated when it is clear and by definition of materials - a stone, although artificial.
From here, it follows the logical conclusion that the question of "what is better" is not entirely correct. And in that, and other material there are their advantages, and certain "minuses". Therefore, we will dwell on some of the features of construction, taking into account those problems that most of all worry a private developer.
Work and with the fact, and with another material does not differ in particular complexity. This is not the construction of a log cabin, when it really can not do without the help of a professional, at least as a leader of the work. Cellic concretes are well processed, while they will not need special devices. The appropriate tool is found at any owner. The relatively small weight of the blocks allows them to manually move, including, and height.
But there is one feature. The process of "fitting" of products from aerated concrete (GB) is somewhat more complicated. The fact is that the fastening of these blocks is carried out with the help of adhesive composition, while the construction solution is used for the installation of foam concrete (PB). Therefore, the accuracy of processing products is important, otherwise it will sharply increase, and it is not suiced. And the formation of the so-called "cold bridges" can not be avoided.
Therefore, in organizations selling GB blocks, and offer immediately acquire an appropriate device for alignment of the faces, which is necessarily done and after cutting products (although it can be made independently). But the process itself requires some skills and takes a certain time.
There is another difference. To establish the production of GB at home (if one can talk about the quality), but it is quite possible to make PB on the site of work, it is quite forces to any developer. Forms can be used both purchased and own assembly, from the primary materials.
There is a well-established opinion that the products from aerated concrete - factory production, then their geometry is more correct, which allows you to make a laying evenly. But at the same time, for some reason, the fact that times the foam concrete blocks are "improving" to the solution, then to control, it will not be made on such a layer of labor even for an inexpressible master.
We are talking about the floors. In this regard, aerated concrete "Reliable", and from these blocks can be safely built for 2-3 floors. But about foam concrete, you will not say this - you have to hold a number additional events (For example, reinforcement). Consequently - plus an "Anna" amount to total costs.
And another moment. Foam concrete mass can be poured into a formwork, that is, to equip monolithic structures. For example, additional insulation, interior walls Complex configuration - options sufficient. This adds an extra "plus" foam concrete.
There is an opinion that it is possible not to be facing, but from foam blocks - it is necessary, as they have not too "attractive" appearance. This is how to see - on the one hand, the aerated concrete structure looks neat, and the color is noble - white, especially since everyone has their own concept of beauty.
But there is one, and very substantial, nuance. Unlike his "fellow", GB absorbs fluids well. So it turns out that, taking into account this factor, you will have to shut up "protection" of walls from precipitation. Otherwise, not avoiding constant dampness in the house, and the destruction of the material. Therefore, all advertising "agitas", claiming that on the decoration of aerated concrete (compared to the PB), it is possible to save well - no more than fiction, the next "trash" in the calculation of the incompetence of the buyer. Even if you restrict ourselves to only the waterproofing of injecting (or impregnating), it will require certain material investments.
Naturally, since we are talking about a residential building, you will have to spend a whole range of events both in the construction process and in the settlement. It is the laying of pipes, cables, and accommodation on the walls of the instruments (for example, boiler), furniture items, and so on. But how to fix it?
A dowel is reliably held in GB, but as for PB, it does not do without anchors - the material is too porous. This is what is big (albeit relative with a skillful approach) "minus" foam concrete. Therefore, the choice of the type of finishing of products from PB is somewhat limited. For them, most often the owner chooses plastering compounds to simplify (and reduce it) external decoration surfaces.
And in that, in the other. The main thing is to choose the right "parameters" of materials. This is the dimensions (it means the thickness of the walls), and the density. Much depends on the correctness of the installation, conducting measures for thermal insulation. But it is undoubtedly one thing in such houses is more comfortable than in brick, as foam, and gas blocks are able to maintain a microclimate at one level both in the summer and in winter.
Almost costs are approximately the same (with all equal "parameters" - dimensions and the like). If we compare prices for products, then PB is cheaper. Its 1 m3 will cost approximately 2.5 - 2.9 thousand rubles, while for GB, the cost of Cuba lies within 3.1 - 3.7 thousand (with all other equal indicators).
But construction costs are determined not only by this. The glue (when the walls are erected from GB) stacked with a thin layer, but the solution (for PB) is thicker. If you consider the price of cement, then the total costs are approximately the same.
This problem worries many, it even became fashionable - to think not only about their own health, but also on the environment. In this regard, many put "minus" foam blocks, since the technology of their production is based on the use of "chemistry". But for some reason, the fact that more "eco-friendly" products from GB are mounted using adhesives, which also contain various chemicals. Therefore, in reality, there simply makes no sense in reality about the absolute "cleanliness" of construction.
It is believed that for blocks from GB, it is 1.8 times more than for PB. But these data are relative. Much depends on the quality of the installation and finishing work, as well as from the regularity and correctness of preventive measures, since good care Significantly increases the durability of any material.
For the maternity owner, information is more than complete. And on which "stone" to stop your choice - think by ourselves, given the outlined considerations about the nuances of construction from these "light" concrete.
