Pros and cons of composite fiberglass reinforcement. Advantages and Disadvantages, Specifications and Applications of Fiberglass Reinforcement (FRP) Fiberglass Reinforcement

Fiberglass or composite reinforcement is an alternative to steel products and is used to reinforce concrete in cases where special requirements are placed on their physical and chemical properties. Fiberglass does not deteriorate from moisture, its mass is 9 times less than the mass of steel of the same strength. Thermal conductivity indicators reduce heat loss, and the temperature range is from -70 to 120 degrees. This material is used to reinforce concrete tanks in chemical plants, bridge supports and foundations. It is suitable for bonding multi-layer masonry walls and strengthening floors and screeds. Fiberglass is used in road construction in the construction of embankments and coatings.

Manufacturing technology

The main components of fiberglass rods are fiberglass and epoxy resin. First, the threads are impregnated with an adhesive, and then they undergo a polymerization process. To do this, they are pulled through the dies of the desired diameter. At the final stage, a relief is applied to a smooth surface by rolling between rollers, which have a corresponding corrugation. In this way, bars of a light yellow color are obtained, which have optimal adhesion to concrete. Products have a diameter of 4 mm to 2 cm. In addition to fiberglass, basalt, carbon and aramid fibers are used in production. In this case, the products differ in color and may have longitudinal ribbing. To obtain structures from reinforcement, fiberglass is bonded using plastic elements.

Advantages and disadvantages of fiberglass products

Fiberglass products are distinguished by increased tensile strength and are three times superior to steel reinforcement in this indicator. The density of fiberglass is much less than that of metal, respectively, the weight is also much lighter, which makes it possible to lighten the concrete structure. A significant advantage is that the plastic does not rust, even if it comes into contact with water, including sea water. The material does not react to the effects of alkalis, acids and other active chemicals. It does not break down in the cold and can withstand an unlimited number of freeze/thaw cycles. Fiberglass has low thermal conductivity, which contributes to the improvement of this characteristic in concrete products with composite reinforcement. In addition, composites and concrete have approximately the same coefficient of thermal expansion, so such structures are not subject to cracking. The armature is a dielectric and does not interfere with radio waves. It can be produced in any measured length. Due to the special properties of epoxy resin, long products can be wound into coils, and then restore their original straight state, while maintaining integrity and all their strength characteristics.

Fiberglass is significantly inferior to steel in elasticity, that is, it bends quite easily. For this reason, its use in ceilings must be accompanied by careful calculations. The material is fireproof, but at a temperature of about 600 degrees it softens and loses its mechanical properties. In hazardous industries, it is necessary to ensure the thermal protection of structures with such reinforcement. The strength of composite joints when creating a lattice leaves much to be desired. Alternatively, steel rods are attached to the ends of the fiberglass and welded. In the manufacture of structures of a special shape, it is necessary to order reinforcement with a certain bend, since it will not work to give it the desired appearance on the spot.

Reinforcement is an integral process of creating reinforced concrete structures or products. In some cases, steel is contraindicated, so in the middle of the last century, a replacement was developed - composite reinforcement.

Concrete is a strong but completely non-plastic material. It excellently resists compressive loads and does not withstand tensile pressure. Therefore, an improperly formed foundation begins to quickly crack, crumble, and requires restoration work. To strengthen and strengthen the structure, a skeleton of reinforcing rods is used, which evenly distributes loads and increases the service life of the skeleton.

Fiberglass composite reinforcement for the foundation is made from a mixture of:

1. reinforcing component - glass staple fiber, which takes on mechanical stress;

2. polymer binders providing good adhesion to concrete, uniform pressure distribution and protection from external aggressive environment. Most often it is a multi-component epoxy resin with special additives, hardeners and accelerators.

The ratio of the elements of the composite is approximately 75:25. There are practically no uniform standards for the production and use of this type of product, and therefore each company develops its own recipe and recommendations on how best to calculate the minimum required amount of fiberglass for the foundation, walls, columns, slabs, and so on.

2 types of fiberglass fittings are produced:

• Periodic profile resembling a spiral winding. Achieved by winding a fiberglass rod around the main rod. From above, the product is covered with a layer of binder, which protects the reinforcing component from external influences.
• Conditionally smooth. The surface is sprinkled with fine-grained sand, which promotes better adhesion of the material with concrete or other type of mortar. The cost of this type of product is about 15-18% higher than the corrugated counterpart.

The fittings are produced in bars with a diameter of 4-18 mm. It can be bought packed in coils of 50-100 linear meters or rods 6 m long.

The scheme for the formation of a spatial frame is similar to a metal one. The task is to strengthen the foundation, floor or slab in the most vulnerable areas. Therefore, horizontal rows are located closer to the surface with a minimum interval between them of up to 50 cm, and transverse distribution and vertical support elements are installed in the form of a frame with a step of 30-80 cm.

The use of rebar is not limited to supporting structures such as foundations, columns, power line supports, lighting, and the like. Fiberglass is used:

• For the construction of septic tanks, roads, sidewalks.
• In the production of shaped products.
• When forming industrial floors, floorings, fences, bridge structures.
• When erecting multilayer brickwork or monolithic walls, partitions, ceilings.

Fiberglass products are used even in the construction of log houses from rounded or debarked logs. The fact is that with some mistakes (damp forest, changes in design without the consent of the architect), in places of greatest load, the structure begins to sag or bend. The use of metal products indoors is undesirable, so composite reinforcement comes to the rescue.

Pros and cons of fiberglass

The weight of composite reinforcing products is almost 4 times less than the steel analogue. The foundation will weigh significantly less, which means that the load on the soil will decrease. In addition, the armature has the following advantages:

1. Almost complete inertness to aggressive environments, including alkali released by concrete, solvents, sea water and the like. Thanks to this property, fiberglass can be used in the construction of barriers for hydroelectric power plants, moorings, piers and other objects.

2. Complete radio transparency and absolute inertness to magnetic fields. Composite reinforcement is perfect for the construction of buildings (foundations, walls and ceilings) that are supposed to house laboratories, special-purpose rooms, and the like.

3. The thermal expansion index is close to that of concrete, so there will be no problems with temperature changes.

4. Easy to transport. Fittings can be transported even in the trunk of a car.

Unscrupulous sellers try to attribute the cost to the merits of their products, but this is rather a minus. The price of rolled metal with a diameter of 8 mm is 8 rubles / linear meter, and fiberglass of the same section - 18.

The price of glass composite in Moscow and the Moscow region:

Among the shortcomings, we also note:

1. Instability of glass composite reinforcement to high temperatures.

2. When loaded, the rod begins to stretch, although, on the contrary, it should restrain the deformation process. For comparison: the elasticity index of steel is 200,000 MPa, and that of fiberglass is 55,000.

3. When concrete is poured into the formwork, the composite material bends and deforms. Because of this, it is difficult to form an even foundation.

4. Wire or plastic tie is used for tying, welding is not allowed.

5. Curvilinear structures, as well as corners, the area of ​​​​the output of columns have to be formed using metal reinforcement, glass-composite is categorically not suitable.

6. There is no unified package of regulatory documents and standards, so it is difficult for buyers to choose a really high-quality product. It is even more difficult for designers who must recalculate loads.

Due to the large number of shortcomings, the composite is not widely used in construction, both industrial and civil.

People's reviews

“Steel and composite rebars are offered on the market nearby. The seller gave brochures and flyers for the latter to read. I decided to take a sample for the foundation for a frame bath. I really regretted that I did not look for additional information about this product, did not read the reviews. The base stood for a couple of months, then cracks began to appear, and the question arose of its repair. I will strengthen with metal strips and hope that it will not get worse further.

Viktor, Samara.

“Sellers claim that glass composite helps to save money. From my own experience, I was convinced that they are lying. Firstly, you have to recalculate: if metal reinforcement with a diameter of 8 mm is required, then fiberglass must be taken with a cross section of 14 or 16 mm, and its price is 2 times higher. The plastic clamps that come with the bundles don't inspire confidence at all."

Egor, Kazan.

“I built a house from expanded clay concrete blocks with a finished front finish. According to the technology, a reinforcing belt must be laid every 4 rows. I bought 3 coils of fiberglass on the market for these purposes and took it to the construction site in my car, since the load is compact and weighs little, and besides, it does not rust.”

Vladimir Vorontsov, Kaluga.

“I used glass composite rods to strengthen the walls of foam blocks. It is easy to work with it, and cut, and fasten. Easy to transport, although expensive.

Pavel Kalinin, Rostov-on-Don.

To reduce the cost of construction, it is possible to use modern substitutes for traditional building materials. In our case, this is fiberglass reinforcement instead of steel.

Application

Composite fiberglass reinforcement is used for:

• reinforcement of foundations;
• industrial floors;
• strip foundations in private houses, cottages, light industrial buildings and structures;
• in ceilings on corrugated board;
• roads and road construction;
• in land management (for example, strengthening the coastline).

Advantages of fiberglass reinforcement

The main advantage is the reduction in the cost of construction work, which is provided by the following factors:

• prices are 40-50% lower than for steel reinforcement;
• produced in coils of 50 and 100 meters (except ASK 14 mm, which comes in 6 m whips), which reduces the amount of trimmings and waste;
• easy to cut and install on site;
• loading and delivery is cheap, because the reinforcement itself weighs 9 times less than steel.

There are 8 bays in the car (ASK 10 - Ø 10 mm) of 50 m each, which are necessary for pouring the foundation of 1 house.

At the same time, the total weight of 400 meters of rebar is about 48-50 kg and is easily loaded by 1 person in 10 minutes.

For more dense placement during transportation, we make bays of different diameters. For example, 2 bays of 50 meters each with reinforcement 8 mm thick:

Features of fiberglass reinforcement manufactured by VZKM

• We produce in accordance with GOST R 31938-2012 from Owens Corning's Advantex fiberglass, which meets high European standards.
• You can buy fiberglass reinforcement from us with a diameter of 4, 6, 7, 8, 10, 12 and 14 mm in coils of 50 and 100 meters.
• It is possible to produce rebar thicker than 14 mm by special order.
• Resistance to chemical and mechanical influences - it is possible to store for a long time (fiberglass retains its properties for more than 80 years).
• We can launch 800,000 meters of rebar per month. There is always a stock of 20-60 thousand m.p. in stock. various diameters for implementation.

Prices for fiberglass reinforcement VZKM

Prices are for the purchase of 1 rebar coil. If you want to buy fiberglass reinforcement more than 1 bay, then call us and we will try to provide you with a more interesting price.

Name and marking	Equally strong metal diameter. fittings AIII	Diameter bays, m	Price (according to GOST)
ASK 4 - Ø 4 mm, 100m*	6 mm	1.0 or 0.8	9 rub.
ASK 6 - Ø 6 mm, 100m*	8 mm	1.0 or 0.8	14 rub.
ASK 7 - Ø 7 mm, 50m*	10 mm	1.0 or 0.8	15 rub.
ASK 8 - Ø 8 mm 50m*	12 mm	1.0 or 0.8	18 rub.
ASK 10 - Ø 10 mm 50m*	14 mm	1	26 rub.
ASK 12 - Ø 12 mm 50m*	16 mm	1	36 rub.
ASK 14 - Ø 14 mm 6m*	18 mm	-	46 rub.

Wholesale prices for fiberglass rebar

If you represent a hardware store or a wholesale base of building materials, or you are a large building contractor (you need a one-time need from 1000 r.m. of fittings or there will be regular purchases), then we can offer special much lower prices with individual delivery conditions.

Get a wholesale price tag for fittings possible on request

When fiberglass reinforcement was first developed (57 years ago), its cost was much higher compared to steel bars, so the composite material was not widely used. Today the situation has changed, the cost of reinforcing material has decreased, and its advantages have been appreciated by construction companies involved in the construction of facilities in regions with a cold climate.

Now fiberglass reinforcement is produced both in the form of threaded rods and in bays. The cross section of the rods is from 4 to 32 mm. Let us consider in more detail the areas in which reinforcement of this type is most often used.

Features and scope

Plastic reinforcement is a physical body, which consists of the following elements:

• The main trunk, made of parallel fibers, interconnected with a polymer resin. This element provides the strength characteristics of the reinforcement.
• An outer layer of fibrous material that is wound in a spiral around the main shaft of plastic reinforcement. Such winding can be sand-sprayed or bi-directional winding.

If we talk about the use of fiberglass reinforcement in construction, then today composite materials are widely used for:

• reinforcement of various reinforced concrete structures;
• repair of reinforced concrete and brick surfaces;
• installation of buildings made of lightweight concrete;
• layered laying of walls (flexible connection technology);
• reinforcement of tiled, columnar and strip foundations;
• strengthening concrete screeds;
• water disposal;
• creation of roadbeds and fences;
• design of seismically resistant reinforcing belts.

In addition, fiberglass reinforcement is used in many other industries, and its characteristics meet all building requirements and standards, so products of this type are suitable for both private construction and mass production.

Manufacturing technology

Composite reinforcement can be manufactured using one of three technologies:

1. Winding. In this case, winding is performed on specialized equipment. The winder moves along the rotating mandrel. After several approaches, an integral cylindrical surface is created, which is sent to the heat treatment furnace.
2. Stretching. First, the fiberglass is unwound from the spools and impregnated with resin. After that, the material passes through the dies and excess scrap is removed from it. At the same time, the plastic reinforcement bars are given a cylindrical shape. After that, the winder manually applies a spiral rope to the workpiece, which is used to increase the adhesion of the material and concrete mortar. At the next stage, the fiberglass reinforcement is sent to the furnace, where the resin hardens. Once the rods are fully polymerized, they pass through the broaching mechanism.
3. Manual production. This is the most expensive process for making plastic rebar, so it is only used for small-scale production. In this case, a special matrix is ​​first prepared, on which a gel coat (protective decorative layer) is applied. After that, the fiberglass is cut, impregnated in resin and hardeners and placed in a mold. Next, the product is heat treated and cut.

The first method of manufacturing plastic fittings is considered the cheapest, so products that have been wound are used most often.

In the manufacture of rods of this type, various types of fibers are used.

Varieties of composite reinforcement

Fiberglass reinforcement is of various types, the most famous of them are:

• ASP is a fiberglass reinforcement, which is manufactured by the classical method of winding fiberglass. The diameter of the fibers of the product is from 13 to 16 microns.
• ABP - basalt-plastic reinforcement. In this case, the main stem of the product is made of basalt fibers with a diameter of 10 to 16 microns.
• AUP - carbon fiber reinforcement, which uses both fiberglass and thermoplastic. The diameter of the fibers used is up to 20 microns.

Most often, ASP and ABP are used in construction. Carbon fiber reinforcement has a reduced mechanical strength, so it is used very rarely. In addition, ASPET products (a mixture of fiberglass and thermoplastics), ACC (combined fittings) and many other varieties can be found on sale.

In addition, fiberglass reinforcement is sold:

• piece rods;
• grid;
• frames;
• finished designs.

In addition, products are classified based on the type of structures for which they are used:

• fittings for ZhKB;
• mounting;
• working;
• distribution.

It is also worth paying attention to the properties and characteristics of composite reinforcement.

Technical properties, advantages and disadvantages of plastic fittings

When choosing plastic fittings to strengthen the foundation, it is worth considering the following product characteristics, which in most cases are much better than their metal counterparts:

• The maximum operating temperature is from 60 degrees.
• Tensile strength - not less than 800 MPa (for ASP reinforcement) and not less than 1400 MPa (for products of the AUK type). For metal, this figure barely reaches 370 MPa.
• Relative elongation - 2.2%.
• Since this material belongs to the first group in terms of chemical resistance, fiberglass reinforcement can be used in an aggressive or alkaline environment.
• Density - 1.9 kg / m 3, so the ASP weighs 4 times less than the steel frame.
• Ease of transportation.
• Low thermal conductivity.
• Long service life (more than 80 years).
• Corrosion resistance.

In addition, when using fiberglass reinforcement, you do not have to be afraid that it will jam the cellular signal or radiotelephone, since this material is a dielectric.

Also, fiberglass is resistant to low temperatures, but at extremely high rates, the material begins to melt. However, in this case, you will have to heat the surface to at least 200 degrees.

Interesting! Builders never have a question about how to cut fiberglass reinforcement, since it lends itself well to processing with an ordinary grinder.

The most obvious disadvantage of composite reinforcement is its instability. If you want to prepare it separately from the formwork, it can “skew”, so it is better to install the armo-belt directly into the formwork.

If we talk about the cost, then basalt-plastic reinforcement will cost about 6 rubles per linear meter, and fiberglass - from 9 rubles. If we compare it with steel bars, costing from 21 rubles per meter, it becomes obvious that today fiberglass rods not only do not “hit the pocketbook”, but also cost almost two times cheaper than metal ones.

However, do not rejoice ahead of time, because there are many unscrupulous manufacturers on the market who offer customers low-quality products.

What to look for when buying fiberglass reinforcement

To distinguish a low-quality product, pay attention to the following nuances:

• Composite reinforcement must be manufactured in accordance with the technological process. If the product has an uneven color with sharp transitions, then such rods are not suitable for construction.
• If the rods are brown, then this indicates that at the final stage of manufacture, the rods did not undergo the necessary heat treatment, or the temperature regime was observed incorrectly. Such products must be rejected at the factory.
• If you notice that the rods are greenish in color, then such products are also not worth buying, they will have a very low modulus of elasticity for fracture. This is due to the too low processing temperature of the fiberglass.

Color is the main indicator of the quality of the rebar, so make sure that the shade of the rods does not differ.

It is also necessary to choose the right clamps for the fiberglass armored belt. Plastic holders are best suited for this purpose:

• Horizontal (for concrete slabs and ceilings) allow you to create a layer with a height of 25-50 mm.
• Vertical (for wall surfaces) - layer thickness 15-45 cm.

Fiberglass reinforcement is a modern development that can significantly facilitate foundation and concrete work. The method is new, therefore, when choosing, it is important to know its characteristics, advantages and disadvantages in comparison with metal fittings.

AKC - what is it, its structure and appearance

Composite reinforcement is a round bar with knurled stiffeners. Made from fiberglass. Produced in various sections. Its diameter, depending on the required strength of the products, can vary from 4 mm to 18 mm. Workpieces can be cut into pieces up to 12 m.

For ease of transportation, the reinforcement is twisted if its cross section is up to 10 mm in diameter. Additional strength is achieved by using fiberglass for the production of continuous fiber. Foreign manufacturers call this method polymer equipment.

In our documents, the glass fiber reinforcement is abbreviated as AKS. Fiberglass reinforcement, made of 2 main parts:

• the main detail is the central trunk. It is carried out in parallel arranged strands of fiberglass. A polymer resin is used to connect them. Such a device gives the product additional strength;
• outer coils or sprinkling for better joining with concrete. They are applied in the form of several spirals along the entire length of the main trunk. There are two ways to make coils - this is powder coating and bidirectional winding of ribs. Composite rebar is available in various types of central bar. A pigtail made of carbon fiber is one of the types of this part.

Physical properties and materials used in the manufacture of reinforcing products

The main characteristics are obtained after a number of scientific studies and the introduction of the latest developments. Some properties make it possible to use it for reinforcement in residential and industrial construction:

• low weight of products - steel reinforcement is an order of magnitude heavier (9 times);
• not subject to destruction from corrosion, to influence of acids, alkalis. According to this indicator, metal reinforcement is inferior by 10 points;
• low thermal conductivity. When arranging foundations and floor slabs, the possibility of thermal insulation damage due to cold bridges is reduced to 0.
• light and plastic- this quality simplifies its delivery and production of works;
• does not conduct electricity, does not lend itself to the action of stray currents;
• due to plasticity accepts any form, it is not required to use welding and cutting machines.

Thanks to these characteristics, the reinforcement of the foundation with fiberglass reinforcement becomes justified both in production and in economic terms. Much in this matter is decided by the material used for the production of ASP. The industry produces composite non-metallic reinforcement from several types of modern plastics. They are based on the following materials:

1. Fiberglass.
2. Carbon fiber.
3. Basalt plastic.
4. Made from aramid.
5. Material created on the basis of glass-reinforced polyethylene terephthalate.

The price of some materials does not allow their use in mass quantities. For this reason, 2 types of materials are most popular. These are fiberglass and basalt-plastic products. The main trunk is woven from many threads of material. They are connected using thermosetting synthetic resins.

For a reliable connection of the rod, either sandy sprinkling is applied, or the barrel wraps around several turns going in a spiral. When using fiberglass reinforcement, its property of slight stretching in a concrete product should be taken into account. In this case, there will be very little contact with the concrete and separation of the coils or abrasive coating will occur.

Basalt plastic products do not have a reliable connection with concrete. The best fixation is given by coils made of carbon fiber, applied to the fiberglass main barrel. In this case, there is a uniform distribution of the load on the entire part and the normal fixation of the rod to the concrete mass.

Advantages and disadvantages of using

Reviews of builders allow us to recognize the following main advantages:

• light weight of products allows not only to facilitate the work of workers, but also makes the structures quite light. Therefore, it is used for cellular concrete and other materials that reduce the weight of the structure while maintaining a high level of reliability and strength;
• metal, able pass cold through cold bridges. The use of fiberglass reinforcement eliminates this possibility; this advantage is especially important in the case of monolithic construction of buildings;
• consumption goes down material when it is packed in coils. Scourges are produced in 12 meters, which allows more economical cutting. This point is especially important in private construction, when every ruble spent is scrupulously calculated;
• enhances economic component, the possibility of linking without overlaps and the use of welding;
• able to serve for a long time and not lose its properties, but metal, laid in a concrete slab, also does not decompose;
• dielectric qualities give a guarantee of safe living in the building, but this dignity is debatable. Concrete is itself a dielectric;
• a high level of chemical resistance is important in foundation work at low temperatures. At this time, various additives are added to the concrete;
• Does not interfere with the passage of radio waves. This quality is especially important in monolithic construction, metal fittings interfere with the normal operation of mobile communications and the passage of a radio signal. The use of composite reinforcement can reduce the level of radio interference in the building.

These products also have disadvantages. A specialist using this material can easily call them:

• Reinforcing fiberglass(asp) exceeds the cost of steel reinforcement. But this minus is easily covered by the possibility of using thinner reinforcement for a similar type of work;
• subject to deformation and destruction at high temperatures, but the likelihood of such an impact inside the concrete is unrealistic;
• if used fiberglass reinforcement for the foundation with many turns, there is no way to bend parts for bending, but the problem is easily solved. It is enough to take a piece of steel bar, bend it at the right angle and tie it to the main lash;
• one of the main The disadvantages are low elasticity when the bar is broken. In this case, fiberglass reinforcement is inferior to steel, but it works better in tension. Due to its low fracture resistance, its use in capital construction is somewhat limited;
• using it in the foundation and pouring concrete from the mixer you need to be extremely careful. Glass fittings cannot be laid in a rigid frame, and under high pressure, its integrity may be broken. Composite mesh is the best solution.

How to knit fiberglass reinforcement, but easier than metal. This does not require the use of different hooks. It is connected with self-tightening plastic clamps. The operation is simple and requires a minimum of knowledge and tools.

Having considered the advantages and disadvantages, it is impossible to unequivocally answer the question of which is better - light plastic or rigid steel. It is subject only to civil engineers.

Scope of use and main types of reinforcing bars

These products are divided not only in appearance and method of applying stiffeners. The main classification is the scope of use of bars:

• working;
• distribution;
• mounting;
• produced to strengthen concrete products and structures.

The production of various products has been established, depending on the tasks set for reinforcement in construction:

• separate, different in size, lashes;
• reinforcing meshes;
• Depending on the size, frames of various designs and dimensions are produced.

With a short period of use, composite reinforcement is used by various construction organizations. It is used for the manufacture of drainage wells, concrete walls, and the strip foundation is reinforced with fiberglass reinforcement. Widely used in road construction.

With its help, they reinforce the canvas, embankments, bases of highways, well strengthen the brick and block masonry of the walls. This material has been widely used in private households and for arranging various greenhouses and a greenhouse, for reinforcing a small foundation. Such structures are lightweight, easy to install and disassemble.

Adds popularity to the material, its ease of transportation and work. For delivery, you do not need to order a truck, you can deliver it by car.

Analysis and comparison of the main parameters of two types of reinforcing materials

You can get a complete and reasoned answer to the question of which fittings are better by carefully comparing the main parameters of plastic and metal fittings.

Material properties	Steel reinforcement	fiberglass composite
Elasticity and plasticity	The metal has a sufficiently high level of these material properties	Fiberglass barrel has a high level of elasticity
Strength limit	Steel reinforcement is inferior to plastic in this property. This value for this material is 390 MPa.	Fiberglass filaments have a great advantage. The strength of the material is 1300 MPa.
Coefficient of thermal conductivity	In this matter, metal, significantly loses to the opponent. This coefficient is 46 W / (m * K).	This value is much less than that of steel and it is equal to 0.35 W / (m * K).
Material density	For this characteristic, steel bars are preferable. Their density is 7800 kg/m 3 .	Here, fiberglass significantly loses to steel. Its density is 1900kg/m 3 .

According to the resistance of plastic to corrosion and chemicals, it is preferable to steel. This material is also better in terms of electrical safety and does not interfere with radio waves in the room. In general, no specialist can decide which material is preferable.

Only by completing other elements of the building and comparing it with the calculation of the structure using steel reinforcement, you can get a reasoned answer. And only after that we reinforce the details of the building and concrete products calmly and with confidence in the chosen material.

In conclusion, it should be noted.

Experience with this type of reinforcement appeared in construction several decades ago. Despite this, the method has gained a significant foothold in the concrete materials market. The scope of fiberglass reinforcement is quite wide.

These are the manufacture of greenhouses on a peasant farmstead, low-rise construction, use in the construction of highways. In each of these areas, the consumer receives a reliable and lightweight design with minimal effort and money.