Fiber foam concrete is the same as foam concrete, only to which reinforcing additives - fiber fiber - are added during the mixing process. During the kneading process, the fibers intertwine with each other and create a material that is very strong and flexible.
For successful installation of structures, a level of tensile strength should be ensured that is at least 1 MPa. For autoclaved cellular materials, this ratio decreases to 6...8%. That is, even if the structure is made of autoclaved concrete with a density of 1000 kg/m3, with a strength class of B10, the Rbt value does not reach the required level.
The technological way out of this situation is dispersed reinforcement of foam concrete with fibers, which can increase their tensile strength by 5...10 times. Increasing the tensile strength of a material entails a significant list of advantages, the manifestation of which is important in the manufacture of products, their transportation, installation and operation of constructed facilities. Dispersion-reinforced foam concrete of non-autoclave hardening is called fiber foam concrete (FPC). The most important physical and mechanical properties of fiber foam concrete of various densities in comparison with traditionally produced cellular concrete are shown in the table.
From the data given in the table, it follows that increased tensile strength very significantly increases the weather resistance of fiber foam concrete compared to foam and aerated concrete. The presence of dispersed reinforcement in the structure of interpore partitions radically affects the value of vapor permeability and quite significantly on thermal conductivity. And if we take into account the fact that the thermal conductivity of water is 20 times higher than the thermal conductivity of air, then the global thermal effect that can be achieved with the correct manufacture and use of fiber foam concrete becomes clear.
Fiber foam concrete differs from existing species cellular concrete:
Increased tensile strength and fracture toughness;
Reduced thermal conductivity and shrinkage deformability.
The implementation of this principle, due to the properties of the material, eliminates the formation of chips and cracks from random impact loads, and makes it possible to avoid plastering the surface of walls made from such products, because the degree of roughness does not exceed 2 mm. That is, to obtain a smooth wall surface, puttying is quite enough.
A comparison of the thermal conductivity indicators of equal-density gas, foam and FPB (table) shows that the latter differ favorably (by 15...20%) in better side, while the vapor permeability of FPB is less. According to our data, the vapor permeability of FPB with a density of 700 kg / m 3 corresponds to brickwork on cement-sand mortar, the density of which is at least 1800 kg / m 3.
Jumpers:
Loads on window units compensated by jumpers. Reinforced concrete lintels are “cold bridges” that worsen the thermal properties of enclosing structures, therefore, over the window opening, not one lintel is often installed according to the thickness of the wall, but several thin ones, between which mineral wool thermal insulation materials are laid, so at the time the object is put into operation, everything is “perfect” " But builders have not yet given an answer to the question of how to replace the thermal insulation layers after they have caked. If reinforced concrete lintels are replaced with thermally efficient block or arched ones made of fiber-reinforced concrete, then the need for additional thermal insulation this element of wall structures.
Testing of Fibopen concrete:
During 2010, an initiative group of specialists (Nabokova Y.S., Chumakin E.R.) manufactured and tested under long-term load a floor slab measuring 900x300x4800 mm made of fiber foam concrete with a density of 800 kg/m 3, reinforced with volumetric metal frames. Tests showed that the permissible deflection (according to the standard 6.85 mm) was achieved after exceeding the load of 730 kg / m 2, i.e. 2.4 times higher than the standard for slabs intended for residential use.
With a specific load of 2.2 t/m2 (4 times higher than the standard load), the deflection of the slab in the middle part of the span reached 35 mm, but no visible cracks were found in the tensile zone of the product. The slab did not receive local crushing in the places of support. With further loading of the slab up to 8.9 tons, the kinetics of deflections was not recorded. The gross weight of the tested slab was 1.2 tons, which is at least 15% lighter than the hollow core reinforced concrete slab the same area. Of course, one-time tests do not allow us to make global generalizations. However, this initiative experiment shows the fundamental possibility of manufacturing from cellular concrete, dispersedly reinforced with fibers, large-sized products designed not only to improve the thermal and acoustic properties of buildings, but possibly also to bear loads.
In addition, the universal form-building properties of fiber foam concrete mixtures make it possible to diversify the architectural appearance of interiors and facades.
Identifying the shortcomings of other heat insulators:
In comparison with fiber foam concrete, it is known that EPS has low heat and fire resistance. Before ignition at t = +80 °C, destruction develops in the EPS, leading to a change in volume and the release of harmful toxic substances. An assessment of the performance of PPS as part of three-layer building structures showed that PPS is physically unstable under the plastered surface. Even at a temperature of +20 °C the amount harmful substances, released by PPP produced by the Minsk Construction Products Plant, exceeds the MPC (maximum permissible concentration) by 2.5 times. According to the Center for Environmental Toxicology (Moscow), the content of chloroform, isopropylbenzene, ethylbenzene, xylene, naphthalene and other toxic substances in the panels residential buildings containing EPP as insulation exceeds the maximum permissible concentration from 10 to 100 times!
In humidified thermal insulation material arise favorable conditions for rotting of the wooden (or corrosion of the metal) frame and softening of the gypsum fiber sheet, since gypsum is not a waterproof material. The development of the listed processes will first appear in the form of “wet spots” indoors, and then mold will appear in the interior. Similar claims can be made to almost any type of three-layer panels because steam always diffuses from a dense material into a porous one, but on the contrary, does not move.
Eventually:
It is easy to conclude that changes in the properties of expanded polystyrene from the influence of uncontrolled random factors are potentially dangerous if it is used as insulation for building walls. The use of PPP is also economically unprofitable if the period of operation of the building must exceed 10 years. For use in capital construction, materials are required whose properties the best way satisfy a set of requirements for environmental friendliness, thermal efficiency, fire and explosion safety, comfort and durability, reliability and maintainability, which are imposed on them not only at the time of construction, but also during the operation of buildings.
Building material Fiber foam concrete - the choice of modernity!
Blocks based on foam concrete with the inclusion of fiber have become very popular with modern builders. This is due to the fact that this material has a number of positive qualities, which are so necessary for the walls of the house. However, it is worth remembering that fiber foam concrete is a product made of sand, cement and fiber-based foam material, which means it also has its disadvantages associated with the production technology and the components used.
Amateur photo of a structure made from this material
Properties and scope
To begin with, it is necessary to say that materials of this type are manufactured by certain companies. Therefore, it is worth talking about product quality based on general characteristics, but not based on a specific party. Taking this into account, we will consider fiber foam concrete as a separate product, created without disturbing the technical process (read also the article “Colored concrete - everything you need to know about this group of materials”).
Various block sizes manufactured by one manufacturer
Characteristics
First of all, it is worth saying that this type of material can safely be called the most environmentally friendly. It is assigned index 2, while wood is in first place, and brick is in tenth (see also the article “Cement concrete: properties and characteristics of the material”).
At the same time, fiber foam concrete does not need additional processing, which would reduce this indicator, which cannot be said about wood, which requires impregnation and protection from fire.
Similar products have air bubbles of different sizes
- Special attention should be paid to the fact that products made from this material can have different dimensions. Large blocks are especially in demand, as they significantly reduce installation time and simplify it. Also, when making them, you can take into account some features in advance and create additional forms, which will completely eliminate diamond drilling of holes in concrete or reduce their number to a minimum.
- It must be said that this material retains heat well, but it should not be used without additional insulation. The fact is that fibro foam concrete blocks do not have a homogeneous structure, since the air bubbles in them are randomly located and have different size. It is because of this that it is worth installing at least thin insulation so that the insulation is uniform, although in regions with warm climate You don't have to do this.
If necessary, it is very easy to cut off any part from the block, since it has a rather soft structure
- Properly manufactured foam fiber concrete has excellent antibacterial properties.. It is not afraid of mold or mildew, but professional craftsmen still advise adding a primer with similar additives to the solution or performing subsequent processing.
- Usually, the disadvantages of fiber foam concrete are not as pronounced as the advantages. They consist in relatively low strength. Moreover, this material is quite suitable even for the manufacture of three-story houses.
- It is also worth saying that these blocks are very easy to process.. By choosing them to create walls, you can avoid such a process as cutting reinforced concrete with diamond wheels.
Advice! When purchasing a batch of such material, you should ask the seller or manufacturer for a quality certificate. It must describe all declared characteristics and their compliance.
Application area
Considering that such blocks are light in weight, they are often used for making interior partitions or jumpers.
- Many craftsmen use this material to create small buildings and houses. The fact is that its price and properties make it possible to save money and solve a number of problems related to insulation and environmental friendliness.
Composition of the solution for creating such products
- It is not recommended to use such blocks for making a foundation or plinth. Typically, the installation instructions suggest using more durable products in such cases.
Advice! This type of material should not be confused with aerated concrete, since they have completely different characteristics, which naturally determines their scope of application.
- When doing the work yourself, it is worth remembering that these blocks have a certain absorbency, and therefore the solution is made slightly liquid.
- It is worth remembering that each manufacturer of these materials has its own system of standards, which does not always coincide with popular dimensions. Therefore, when ordering blocks, you need to know their size in advance.
- Finished products made from such material should not be left without appropriate finishing. She will not only decorate appearance, but will also serve as additional protection.
Often interfloor ceilings are poured cement mortar containing fiber and foaming agent, thereby obtaining a monolithic slab with excellent characteristics
By watching the video in this article you can learn more about this type building material. Also, based on the text given above, it is worth concluding that for small buildings such blocks are the most optimal and can be completely used without insulation (see also the article “Concreting seams: types and features”).
However, it must be remembered that fiber foam concrete does not have a very good appearance and needs additional finishing. At the same time, his specifications They allow you to save a lot of money, which is well worth it.
Building a house today is easy and simple. Technologies allow this to be done quite quickly and at an affordable price. The most popular building materials for construction individual houses today are foam concrete blocks, aerated concrete blocks and fiber foam concrete.
A house made of aerated concrete blocks is fast!
They began to build houses from aerated concrete back in the 1980s of the last century, and today this material has long been surpassed in its consumer qualities classic brick. Compare for yourself - the main advantages of aerated concrete are low thermal conductivity, high heat resistance, noise insulation and frost resistance. Aerated concrete blocks are lightweight, which means there is no need to build a powerful foundation. And the price of a house made of aerated concrete is within the capabilities of almost everyone.
Gas block with cladding and insulation - 6955 rub/m2 of finished wall (working with materials)
Fiber foam concrete - durable!
Houses made of fiber foam concrete are built to last for centuries. Fiber foam concrete does not have the disadvantages of aerated concrete, since this material is made from foam concrete reinforced with synthetic or natural fibers. Buildings made of fiber foam concrete are capable of retaining heat 20–30% stronger than other building materials. Fiber foam concrete is able to control the microclimate in the room: in summer it is cool in such a house, and in winter it is warm and dry. In terms of its environmentally friendly properties, fiber foam concrete is second only to wood. At the same time, it has no equal in terms of durability.
The composition of fiber foam concrete includes high-quality cement, selected sand, fiber (reinforcing polypropylene threads) and an air-entraining additive (foaming agent) to create a porous structure.
A 30 cm thickness of a fiber foam concrete wall can provide heat savings comparable to brickwork two meters wide. At the same time, fiber foam concrete is the only building material that, with a minimum width of masonry without insulation, meets the requirements of modern SNIPs for heat conservation. And the sound absorption quality of fiber foam concrete is proven by the following example - when interior wall 20 cm thick, you can’t hear any sounds from the next room at all.
A monolithic house made of fiber foam concrete is ideal in everything! This is the best value for money!
Fiber foam concrete - 5900 rub/m2 of finished wall (work + materials)
Know-how today– monolithic construction from fiber foam concrete. The advantages of this method of building a house are obvious.
Firstly , you save by eliminating the process of laying blocks. Fiber foam concrete using monolithic housing construction technology is poured directly into the ring masonry, removable or permanent formwork.
Secondly , the integrity of the house frame is ensured - there are no joints that allow drafts to pass through, no use of mortar that creates voids in the walls, no “cold bridges.”
Third , the walls of the house at monolithic filling made from fiber foam concrete are smooth and even, which means they do not require additional plastering works.
Fourth , houses made of fiber foam concrete are fireproof. The Ministry of Emergency Situations recommends the use of fiber foam concrete walls at facilities where there is a risk of fire. Fiber foam concrete has the first degree of fire resistance, does not emit harmful and toxic substances when exposed to open fire and retains the strength of the structure.
Fifthly , monolithic house made of fiber foam concrete - light and stable. It can be erected on almost any site, providing all the required quality characteristics. Price monolithic house made of fiber foam concrete with a facade made of facing bricks is much cheaper than a similar house made of aerated concrete blocks with insulation and brick cladding. And the quality and durability of fiber foam concrete are many times higher than the characteristics of any other building material.
These are the main advantages of using fiber foam concrete. In addition, it can be noted that when building a monolithic house from fiber foam concrete, you do not need to spend money on transportation costs for delivering blocks to the construction site - fiber foam concrete is produced directly on the construction site.
Our company produces fiber foam concrete in full accordance with the approved technological process on high-tech equipment. All components of the solution are imported and of the highest quality. Fiber foam concrete is foamed with special blades at certain speeds. In its production, a specially developed foaming agent is used, which ensures highest quality fiber foam concrete.
We build houses from fiber foam concrete - with high quality, quickly, easily and at the most affordable price!
Construction company "SK-Absolute" provides a full range of services from design to construction of houses and cottages using technology monolithic construction from fiber foam concrete.
When constructing facilities, we use the most modern equipment, ensuring high-quality performance of work.
The technology does not require the use of lifting mechanisms, allows to reduce construction time, implement architectural solutions of any complexity.
The main material for construction is fiber foam concrete - foam concrete with the addition of polypropylene fibers.
Houses made of fiber foam concrete are equally good in both cold and hot climates. Characterized by low thermal conductivity and being vapor permeable, they provide comfortable living. Due to natural ventilation The house has a healthy, pleasant microclimate. The materials used are non-flammable, environmentally friendly, and excellent sound insulators.
What are the advantages of fiber foam concrete?
Reliability
Fiber foam concrete is an almost eternal material, not subject to the effects of time, does not rot, and has the strength of stone. Increased compressive strength allows the use of products with lower volumetric weight in construction, which further increases the thermal resistance of the wall.
Heat
Due to their high thermal resistance, buildings made of fiber foam concrete are able to accumulate heat, which during operation can reduce heating costs by 20–30%. High geometric accuracy of product dimensions allows you to avoid “cold bridges” in the wall and significantly reduce the thickness of the internal and external plaster. The weight of fiber foam concrete is less from 10% to 87% compared to standard heavy concrete. Significant weight reduction results in significant savings on foundations. In the diagram on the right you can see a comparison of the thicknesses of single-layer enclosing walls according to SNiP-N-3-79 and SP 41-99.
Microclimate
Fiber foam concrete prevents significant heat loss in winter and is not afraid of dampness. The pores of fiber foam concrete, unlike aerated concrete, are closed, this allows you to avoid too much high temperatures in summer and regulate the air humidity in the room by absorbing and releasing moisture, thereby helping to create a favorable microclimate.
High installation speed
The house is installed without the use of lifting equipment due to the lightness of the structural parts and unique mobile equipment for pouring fiber foam concrete. The work does not require much time and labor - two-story structure a cottage can be assembled by a team of six workers in 10-12 days.
Soundproofing
Fiber foam concrete has a relatively high ability to absorb sound. In buildings made of cellular concrete, the current requirements for sound insulation are met.
Environmental friendliness
During operation, foam concrete does not emit toxic substances and is second only to wood in its environmental friendliness. For comparison: the environmental friendliness factor of cellular concrete is 2; wood - 1; bricks - 10; expanded clay blocks - 20.
Economical
Fiber foam block has a high geometric dimensional accuracy of products (+1mm) and can significantly reduce the thickness of internal and external plaster, as well as the total consumption of masonry mixture. The weight of foam concrete is 10% to 87% less than standard heavy concrete and brick, so there is no need to make powerful and expensive foundations.
Fire safety
Products made of fiber foam concrete correspond to the first degree of fire resistance; when exposed to open fire, they do not lose strength and do not emit harmful substances. The Ministry of Emergency Situations is recommended for fire walls, including those at storage facilities for highly flammable materials.
Transportation
The ratio of weight, volume and packaging does everything building construction convenient for transportation and allow full use of transport capacity.
Wide range of applications
In addition to walls, fiber foam concrete is used for heat and sound insulation of roofs, floors, insulation of pipes, production of prefabricated blocks and partition panels, floor coverings and foundations.
Blocks based on foam concrete with the inclusion of fiber have become very popular with modern builders. This is due to the fact that this material has a number of positive qualities that are so necessary for the walls of a house. However, it is worth remembering that fiber foam concrete is a product made of sand, cement and fiber-based foam material, which means it also has its disadvantages associated with the production technology and the components used.
Properties and scope
To begin with, it is necessary to say that materials of this type are manufactured by certain companies. Therefore, it is worth talking about product quality based on general characteristics, and not based on a specific batch. Taking this into account, we will consider fiber foam concrete as a separate product created without disrupting the technical process ().
Characteristics
First of all, it is worth saying that this type of material can safely be called the most environmentally friendly. It is assigned index 2, while wood is in first place and brick in tenth ().
At the same time, fiber foam concrete does not require additional processing, which would reduce this indicator, which cannot be said about wood, which requires impregnation and protection from fire.
- Special attention should be paid to the fact that products made from this material can have different dimensions. Large blocks are especially in demand, as they significantly reduce installation time and simplify it. Also, when making them, you can take into account some features in advance and create additional forms, which will completely eliminate diamond drilling of holes in concrete or reduce their number to a minimum.
- It must be said that this material retains heat well, but it should not be used without additional insulation. The fact is that fiber foam concrete blocks do not have a uniform structure, since the air bubbles in them are randomly located and have different sizes. It is because of this that it is worth installing at least thin insulation so that the insulation is uniform, although in regions with a warm climate this may not be necessary.
- Properly manufactured foam fiber concrete has excellent antibacterial properties.. It is not afraid of mold or mildew, but professional craftsmen still advise adding a primer with similar additives to the solution or performing subsequent processing.
- Usually, the disadvantages of fiber foam concrete are not as pronounced as the advantages. They consist in relatively low strength. Moreover, this material is quite suitable even for the manufacture of three-story houses.
- It is also worth saying that these blocks are very easy to process.. By choosing them to create walls, you can avoid such a process as cutting reinforced concrete with diamond wheels.
Advice! When purchasing a batch of such material, you should ask the seller or manufacturer for a quality certificate. It must describe all declared characteristics and their compliance.
Application area
Considering that such blocks are light in weight, they are often used to make interior partitions or lintels.
- Many craftsmen use this material to create small buildings and houses. The fact is that its price and properties make it possible to save money and solve a number of problems related to insulation and environmental friendliness.
- It is not recommended to use such blocks for making a foundation or plinth. Typically, the installation instructions suggest using more durable products in such cases.
Advice! This type of material should not be confused with aerated concrete, since they have completely different characteristics, which naturally determines their scope of application.
- When doing the work yourself, it is worth remembering that these blocks have a certain absorbency, and therefore the solution is made slightly liquid.
- It is worth remembering that each manufacturer of these materials has its own system of standards, which does not always coincide with popular dimensions. Therefore, when ordering blocks, you need to know their size in advance.
- Finished products made from such material should not be left without appropriate finishing. It will not only decorate the appearance, but also serve as additional protection.
Conclusion
By watching the video in this article you can learn more about this type of building material. Also, based on the text given above, it is worth concluding that for small buildings such blocks are the most optimal and can be completely used without insulation ().
However, it must be remembered that fiber foam concrete does not have a very good appearance and needs additional finishing. At the same time, its technical characteristics allow you to save a lot of money, which is completely justified.
