Fiberglass rebar dates back to the 60s of the last century. It was then, in the USSR and in the USA, work began on its creation. In the 70s, several dozen buildings, structures and other objects were built in the USSR using fiberglass reinforcement as a reinforcing element. Unfortunately, in the USSR, the introduction of fiberglass reinforcement went quite slowly, and with the collapse of the USSR it stopped altogether for many years. At the same time, outside our country, the study of properties and the introduction of this reinforcement was in full swing. So, in the United States in the mid-70s, mass production of fiberglass reinforcement was started. Here are just a few of the American manufacturers of non-metallic fittings:

• Marshall Vega Corporation, USA, Arkansas. Manufacturing fittings since 1974;
• Hughes Brothers, Inc., USA, Nebraska. Manufacturing fittings since 1984;
• Pultrall, Inc, Canada, Quebec. Manufacturing fittings since 1987;
• TillCo, USA, Arkansas. Manufactures fittings since 1996.

Fiberglass rebar appeared earlier than other types of composite rebar due to the fact that at the time of its appearance, fiberglass was the most affordable of all types of non-metallic fibers. With the development of technical progress, new types of non-metallic reinforcement began to appear based on other types of fibers: carbon, basalt, aramid, etc. After that, all types of such non-metallic fittings were named by one general term: COMPOSITE FITTINGS.

Manufacturers, certificates, patents and quality.

The first Russian manufacturers of fiberglass reinforcement were forced to independently develop and manufacture equipment for its production, then on the Russian market there were offers from Chinese manufacturers. There was no European and American equipment on the market, as it is not now. Since 2010, the number of manufacturers of fiberglass reinforcement in Russia began to grow like an avalanche. At this time, there was a real demand for equipment for the production of composite reinforcement, but reinforcement manufacturing companies capable of manufacturing such equipment, having not only experience in its manufacture, but also knowing all the subtleties and nuances (from their own experience of working on it), usually refused potential customers due to unwillingness to breed competitors. As a result, in the current situation, it was possible to purchase far from the best equipment, made by handicraft people who do not understand anything about the intricacies of the production of composite reinforcement, or the first "raw" samples of Chinese-made equipment, not distinguished by reliability, productivity, scalability for the production of reinforcement of large diameters. There was no need to talk about service and the availability of spare parts for such equipment.

Later on, equipment made in Russia began to appear on the market. It resembled the first Chinese samples - unreliable, of poor quality, with low productivity, ill-conceived, usually made rather handicraft, by companies that knew little about the production of composite reinforcement. And, as it usually happens, the most disgusting samples were most actively offered in this market segment.

Today in Russia, fiberglass fittings are not produced only by the lazy. One gets the feeling that it is made in every basement. These are fly-by-night businessmen who spoil the lives of normal manufacturers, each other, and themselves, and discredit the buyers' idea of \u200b\u200bcomposite reinforcement. How does this happen? It's very simple - another "businessman" is suddenly visited by a "brilliant idea" and he, (at the same time, as a rule) does not understand anything either in chemistry, or in machine-tool building, or in construction, or in economics, decides that he has found a "gold mine ! " He sees an advertising banner on the Internet offering to buy "a little used line for the production of composite rebar, to which a business plan is attached as a gift." He reads this plan, in which he is asked to compare the cost of raw materials with the market value of composite reinforcement. Of course, in this “ingenious” business plan, no one will tell a potential “industrialist” that composite rebar is a seasonal product, that rebar is not sold in winter, and staff still have to pay wages, that you have to pay rent, that the cost of a meter of rebar directly depends on the performance of the line, that most of the lines are unreliable and there are no spare parts for them, that the lines consume a lot of electricity, that the given prices for raw materials are achievable only in the case of purchasing by container norms, that the market price falls annually and the profit rate tends to zero, since the market is filled with one-day manufacturers who have enough brains for only one way to compete - DUMPING. As a result, our newly minted entrepreneur acquires a low-quality, low-performance used line, buys the raw materials that the person who sold the line recommended to him and without understanding anything, begins to drive low-quality fittings like most people like him. A month later, he is already all in debt, the fittings are not for sale because it is impossible to look at their quality without tears and he begins to reduce prices for them. By the end of autumn, they not only stop buying fittings, but even cease to be interested in them. His money is frozen in the form of a heap of low-quality, useless fittings produced by him. Winter begins, there is no money for rent, there is no money for salaries, and so on. And since January, he advertises the sale of a "brilliant business" in the form of "little used line and business plan as a gift." Such a field of miracles in the land of fools. The problem is that the number of these fly-by-night producers is not decreasing - they just replace each other. The fact that they themselves are suffering is half the trouble. Worse yet, they bring down market prices with their dumping, which is what normal large producers suffer from, because the buyer does not understand that "not all yoghurts are equally useful." Moreover, by selling their low-quality composite rebar, they undermine the confidence of the entire market in composite rebar as a whole!

Composite rebar certificates

Unfortunately, the modern Russian reality is that a certificate of a manufacturer of composite reinforcement does not guarantee the quality of its products. Today in Russia these certificates can simply be bought for about 30,000 rubles. And we are not talking about buying a fake certificate, but about buying an "honest" certificate. Certification has long been a common dishonest business in Russia. On the certification services market, there are a huge number of licensed companies that have the right to conduct certification, which not only do not have their own laboratories, but also do not want to contact third-party laboratories to conduct the necessary tests of the products they certify. These companies simply invoice, fill out the form, and sell the completed form. Often they have never even seen the products for which the certificate is issued. But any quality certificate for composite reinforcement should be issued only on the basis of a positive test result carried out in an appropriate, accredited laboratory.

Nevertheless, if you are inclined to believe various pieces of paper with seals, then we can tell you what certificates of conformity can be. "Certificate of Conformity", as the name suggests, is a document confirming that the quality of the product (for which it was issued) corresponds to something .... Now attention ...! Read what exactly is written in the certificate - what exactly the product quality corresponds to. There can be TWO options:

• ... corresponds to TU ...
• ... corresponds to GOST 31938 ...

TU it is an abbreviation for "Specifications" Technical conditions are produced by the manufacturer himself and, accordingly, the manufacturer indicates all the quality characteristics at his discretion. Accordingly, the quality requirements in the technical specifications can be set “below the level of the plinth”. Another problem is that most likely you will not find TU data on the Internet, and the seller will not provide them to you either, so you will not be able to find out what quality requirements are indicated in them (if they are indicated there at all).

GOST this is already an official document that you can find on the Internet and read. The requirements specified in it are equal for all manufacturers. Therefore, a certificate for compliance with GOST requirements is already much better than a certificate for compliance with TU requirements. However, these certificates are also sold for money without any testing. In reality, in order to obtain a certificate of compliance with the requirements of GOST 31938 for a composite fiberglass reinforcement, it is necessary to conduct a fairly large number of different tests (their list and procedure is specified in this GOST itself). This series of tests is very expensive. Based on the results of these tests in an accredited laboratory, protocols are issued to the manufacturer (separately for the results of each type of test).

Based on the foregoing, you can more or less believe in the veracity of the provided certificate for composite reinforcement in the event that you are provided with the following:

• certificate of compliance of the quality of composite reinforcement with the requirements of GOST 31938;
• test reports (SEPARATE FOR EACH OF THE DIAMETERS OF THE PRODUCED FITTINGS !!!) of composite reinforcement (an integral part of any certificate), certified by the seal of an accredited laboratory. EACH of the test reports must contain the following information:
  • Appearance
  • Geometric dimensions:
  • • outside diameter
    • nominal diameter
    • length
  • Tensile strength
  • Tensile modulus
  • Compressive strength
  • Cross-sectional tensile strength
  • Bond strength to concrete
  • Decrease in tensile strength after exposure to alkaline conditions
  • Tensile strength of adhesion to concrete after exposure in an alkaline environment
  • Operating temperature limit
• a copy of the accreditation certificate of the laboratory that issued the valve test reports;
• compliance of the manufacturer's name indicated in the certificate with the manufacturer's name indicated on the tags on the valve itself

Composite Rebar Patents

Today patents for composite reinforcement in our country are dust in the eyes of the buyer. The fact is that the availability of a patent for composite reinforcement has absolutely nothing to do with product quality! Moreover, if the seller informs you at all that he has a patent and in this he competitive advantage, and all other manufacturers who do not have a patent are releasing counterfeit products - run from such a seller, because he is already lying to you! If you are interested in getting a detailed explanation of this statement, read this article: "Patent law in Russia is nothing more than a means of unfair competition." This is not just an article on the subject of patent law, this article is just completely devoted to patents for composite rebar. Remember - the manufacturer's patents for fiberglass composite reinforcement not only does not affect or confirm the quality of the reinforcement it produces, but also often characterizes the manufacturer (owning these patents) as dishonest, using patent law as a means of unfair competition. Believe me, if you read the contents of most of these patents, you will just cry with laughter. So, in one patent, the right winding direction is patented as a "brilliant" idea, and in another, "no less brilliant invention", the left winding direction, etc. But the funny thing is not in this, but in the fact that Some patents, as a formula of invention, patented something that is physically impossible to obtain at all!

High-quality and low-quality fiberglass reinforcement - how to distinguish?

Let's talk about whether it is possible to distinguish high-quality fiberglass reinforcement from low-quality "by eye". Yes, in some cases it is possible. The fact is that there are several characteristic signs of low-quality fittings that can be easily identified visually. As soon as you notice at least one of the signs listed below, know that you cannot buy low-quality fittings and fittings from this seller or manufacturer. Visual signs of low-quality composite fiberglass reinforcement, illustrated by photographs provided from the website about composite fiberglass reinforcement www.alientechnologies.ru:

• All reinforcement must have the same color (we are talking about the color of the body of the reinforcement bars, not the color of the spiral winding). If it is fiberglass reinforcement, then its color should be uniform, light yellow (not brown). Significant differences in rebar color indicate unevenness temperature regime... The darker the reinforcement, the more it was exposed to heat, which leads to a loss of strength and deterioration of other properties of the reinforcement. This usually happens when a stop is made on the production line for any reason and some section of the reinforcement stops inside the furnace and, as a result, overheats there ( in simple words: "Burns out").

• Longitudinal and transverse cracking or delamination of the rods is not allowed! According to GOST 31938, such cracking or delamination is definitely considered a marriage!

• The winding step must be absolutely uniform, not only within the same bar or coil of reinforcement, but also between different rods / coils!

• Gusts, flaking of the winding are not allowed! It is not allowed to tie knots of external winding gusts (which are present in the photo below)!

• If you see that there are fractures in the bay of fiberglass reinforcement, this is definitely a low-quality reinforcement. Typically, such reinforcement breaks while in a coiled state (stressed) under the influence of heat. Such heating can occur when the bay with fittings is under the sun's rays, especially in cases where the bay with fittings is also covered with something.

According to GOST 31938:

Pros and cons of fiberglass reinforcement

The main advantages of fiberglass reinforcement are as follows:

• Fiberglass reinforcement has approximately 2.5 - 3.0 times higher tensile strength than steel with the same diameter. For this reason, the concept of "equal strength replacement" has been introduced, in which steel reinforcement is replaced by a composite one with a smaller diameter, but the same tensile strength;
• Light weight. Composite fiberglass reinforcement weighs 12 times less than "equal strength" steel;
• Fiberglass rebar has a much lower price than steel rebar. Moreover, prices for steel rebar in 2016 have doubled in the first 4 months of 2016, while the price for composite rebar has not changed.
• Composite rebar can be rolled into coils. Usually, composite fiberglass reinforcement is sold - twisted into coils of 100-200 meters. In this form and taking into account its low weight, it can easily be transported in the trunk of a car.

• The fact that the rebar is wound into coils with long, continuous rods of 100 or more meters makes it possible to reduce the amount of waste, since you cut off pieces of exactly the length that you need from the coil and you will not have scraps.

But it must be remembered that composite reinforcement has significant disadvantages. Most Russian manufacturers do not advertise these disadvantages, although any civil engineer can notice them on their own. The main disadvantages of any composite reinforcement are as follows:

• the modulus of elasticity of composite reinforcement is almost 4 times lower than that of steel, even with the same diameter. For this reason, its application requires additional calculations;
• when heated to a temperature of 90-100 ° C, the compound that binds the reinforcement fibers softens and the reinforcement completely loses its elasticity, becoming brittle. To increase the resistance of the structure to fire in the event of a fire, it is required to take additional measures for thermal protection of structures using composite reinforcement;
• composite reinforcement, unlike steel, cannot be welded by electric welding. The solution is to install steel tubes (at the factory) on the ends of the reinforcing bars, to which it will already be possible to apply electric welding;
• such reinforcement cannot be bent directly on the construction site. The solution is to manufacture reinforcing bars of the required shape while still in production according to the customer's drawings;

Fiberglass or steel reinforcement? Price per meter.

The price of fiberglass reinforcement has become the most attractive after the ruble's exchange rate against foreign currencies collapsed twice in 2015. This was immediately followed by a twofold increase in ruble prices for steel rebar at the beginning of 2016. The reason is very simple. The fact is that Russian factories have two sales markets - internal, where rebar is sold for rubles, and external, where rebar is sold for currency. The average cost of metal in the foreign market, expressed in dollars, is quite stable and amounts to approximately USD 1,000 per 1 ton. Therefore, when the exchange rate of the ruble against the US dollar was 30 rubles per dollar, a ton of steel reinforcement cost 30,000 rubles, which was equivalent to 1000 USD. But now the ruble's exchange rate against the US dollar has collapsed and amounted to 66 rubles per 1 dollar, therefore it became unprofitable for factories to sell steel rebar and other rolled metal products to the domestic Russian market at the old price of 30,000 rubles per ton, since the dollar equivalent of this amount is now USD 454.54. The situation has developed in such a way that it has become more profitable to sell steel rebar for export abroad at the old price of 1000 USD / ton. To maintain profits, sales within the country must either be stopped altogether, or the selling prices in rubles must be raised to 66,000 rubles / ton.

I hope you will not be indignant and indignant at this fact, citing as arguments that this is dishonest, since Russian producers use Russian iron ore and consume domestic electricity, the prices of which have not increased either 2 times or 1.5 times. And salaries in Russia have not increased either by half or by one and a half, and often have decreased at many enterprises. This is just business plus banal greed, which neither the FAS nor the Russian government notice, but this is no longer relevant to the topic of this article.

The current price ratio between composite and steel is clearly leaning in favor of composite. Today it becomes possible for the same price to purchase steel and composite reinforcement of equal diameters and sometimes even composite reinforcement with a larger diameter than steel. In this case, you get a composite fiberglass reinforcement with a large preponderance of strength characteristics.

Fiberglass reinforcement - application features.

How to transport fiberglass reinforcement?

If you decide to transport fiberglass reinforcement in the cabin or in the trunk of your car, then take into account the fact that this reinforcement is made from a bundle of fiberglass, each of which has a thickness comparable to that of a human hair. The armature can be covered with these "splinters" that are almost invisible to the eyes. Therefore, if you decide to transport it in the passenger compartment, then take care in advance to put something on the seats.

How to cut fiberglass reinforcement?

If we talk simply about everyone possible options, then composite fiberglass reinforcement can be cut in different ways:

• Snacking;
• Chop;
• Saw with a hacksaw for metal;
• Cut with a grinder.

But the most the right option of all of the above, is the use of a "grinder" with a conventional abrasive or diamond wheel. The fact is that the first two methods have a strong mechanical effect on the adjacent areas of the reinforcing bar, leading to its deformation, chipping and splitting in these areas. Thus, the adjoining ends of the reinforcing bar will be strongly split, approximately as shown in the photo below. Do not be alarmed, in fact this photo shows a segment of composite reinforcement destroyed as a result of a compression test, however, the nature of edge destruction in the form of longitudinal cracking is the same as when biting the composite reinforcement with a bolt cutter or chopping with an ax. Such splitting is highly undesirable, since the resulting cracks may not be visible to the naked eye, but go quite deep into the body of the reinforcing bar. Such cracks in the body of the composite reinforcement rod will act as capillary channels for water and alkali to enter the rod when poured with concrete. In the first case, there is a danger further development cracks due to freeze-thaw cycles. In the second case, the destructive effect of the alkaline environment of concrete on the reinforcing bar is aggravated (now this effect is not only outside, but also from the inside).

Please note that before cutting fiberglass reinforcement, take care of protecting your eyes, hands and respiratory system. And pay special attention to the latter! Do not forget that you are going to cut glass or basalt fibers and the resulting dust will be a completely unnecessary guest in your lungs! You can protect yourself from this dust using a respirator.

To protect your hands from thin, almost invisible splinters in the form of glass or basalt fibers with a thickness comparable to that of a human hair, ordinary cotton gloves are not suitable! You will need so-called “split” gloves or at least cotton gloves with a continuous layer of PVC or latex applied to their inner side.

How to knit fiberglass reinforcement?

We are often asked whether it is necessary to knit fiberglass reinforcement with plastic clamps? No, of course not! The fact is that the purpose of tying reinforcement is to fix the spatial reinforcing cage for its subsequent pouring with concrete and until this concrete is completely solidified. After the concrete has hardened, it does not matter at all whether the frame is connected or not. In other words, even if after the concrete hardens, all the knitting wire (with which you tied the reinforcing cage) evaporated - nothing would have happened to the finished structure!

Fiberglass composite rebar is knitted in the same way as traditional metal rebar. Usually knitted with annealed knitting wire. Well, in general - in any of these ways:

• Traditional annealed steel knitting wire;
• Plastic clamps (allowed according to GOST 31938-2011 COMPOSITE POLYMER FITTINGS FOR REINFORCING CONCRETE STRUCTURES);
• Using pistols for tying reinforcement (pictured below);

Fiberglass reinforcement - reviews

On the Internet, you can find both positive and negative reviews about fiberglass reinforcement. Indeed, it has both pros and cons. We know a large number of objects (including unheated houses on slab foundationsreinforced with fiberglass reinforcement), built using composite fiberglass reinforcement, which stood for more than 6 years and with which nothing happened - no cracking! At the same time, we know a considerable number of objects built using steel reinforcement, which cracked in 1 year. There is a joke on this topic that partly explains the situation: "Technique is in the hands of a savage - a pile of scrap metal!"

To date, a huge number of objects and structures have been built around the world, including bridges using composite reinforcement. Fiberglass fittings and basalt-plastic fittings are used more and more widely, not only abroad, but also in our country. Whole villages are being built using it and no problems arise. However, it is worth remembering that if building codes and regulations are not followed, no fittings will save you! So, for example, if during the construction of a foundation slab you violate all conceivable and inconceivable rules and pour the foundation slab right on top of the clay layer, then it will crack regardless of the type and diameter of the reinforcement used in it!

In construction, as in other industries, they increasingly resort to the use in the production of goods and services the latest technologies and innovative approaches... Fiberglass reinforcement is an example of such an alternative solution. She quickly replaced traditional metal parts, overtaking them in economic and technical parameters... From this article you will learn what fiberglass reinforcement is. The characteristics of this material will be presented in comparison with others.

Fiberglass reinforcement - what is it?

Reinforcing means, or non-metallic fiberglass reinforcement, is a kind of rod with a ribbed surface made of glass fibers. Its profile is helical, and its diameter varies from 4 to 18 mm. The length of the armature can be up to 12 meters. Sometimes it is found in the form of twisted coils, the diameter of such a building material is 10 mm.

Abroad, fiberglass reinforcement, the use of which is as widespread as ours, is called polymer equipment. It is reinforced with continuous fiber. In Russia, you can often find the abbreviation AKC.

What is fiberglass reinforcement made of?

The physical body of the AKC consists of several parts:

1. The main trunk. It is made of parallel fibers that are bonded with a polymer resin. The main barrel provides the strength of the reinforcement.

2. Outer layer - is a fibrous body. It is wound in a spiral around the AKC barrel. It is found in the form of sand spraying or bi-directional winding.

Exist various variations fiberglass, it all depends on the manufacturer's imagination and the appropriateness of the know-how. On sale you can find fittings, the main trunk of which is made in the form of a carbon fiber pigtail.

Basic properties

A lot of research and testing has been done to determine the properties of fiberglass. The results obtained characterize AKC as high-strength and durable equipment for construction, which has a number of advantages over other materials:

• light weight (fiberglass is 9 times lighter than metal reinforcement);
• resistance to corrosion in acidic and corrosive chloride environments (10 times higher than the properties of steel reinforcement);
• low thermal conductivity;
• economy (it is more profitable to transport it, and replacement is carried out less often);
• magnetic inertia;
• radio transparency;
• the armature is a dielectric.

Fiberglass reinforcement: disadvantages

In addition to the indisputable advantages of AKC, thanks to which it has gained great popularity among construction companies and ordinary people, it has its drawbacks. Of course, it is very difficult to call them critical. However, it is worth keeping in mind the negative characteristics of the material, which can affect the construction process.

So the disadvantages:

• low;
• insufficient indicator of heat resistance;
• others.

Due to its low elasticity, AKC is easy to bend. For the manufacture of the foundation and tracks, this is not a serious disadvantage. But in the case of the production of floors, additional calculations need to be made, taking into account this feature fittings.

Insufficient heat resistance is a more serious drawback of AKC. The fact that fiberglass itself is heat-resistant does not mean anything. Plastic connecting link does not withstand high temperatures, however, the fittings belong to the group of self-extinguishing materials. This property is valid up to a temperature of 2000 degrees Celsius, after which the AKC loses its strength. Therefore, the use of fiberglass with concrete is prohibited. Such fittings can be used only in those areas of construction where temperature drops are completely excluded. However, these requirements are almost always met in ordinary residential and some industrial buildings.

Fiberglass reinforcement, the disadvantages of which were listed above, has a number of negative aspects. Over time, its strength is destroyed, and under the influence of alkaline compounds, the reaction rate increases several times. But modern technologies allow you to cope with this drawback. Rare earth metals are added to the AKC, which make fiberglass less sensitive.

Some experts point out the fact that such fittings do not tolerate welding. Therefore, many people prefer to "knit" fiberglass whips.

Fiberglass production

We very often use fiberglass reinforcement at home, for example, in the pouring of foundations, etc. AKS production does not have to be in-line. Many auto repair shops that tune cars produce this material in various configurations. - a common thing for services: they can make a new bumper and other parts out of it. But in this case we are talking about small-scale production. Only large industrial enterprises put AKC on stream.

There are several basic manufacturing methods:

• broaching;
• winding;
• manual way.

The first method is used to manufacture various profiles. Glass fibers are unwound on a continuous flow line. Most often, parallel bundles of material are unrolled from the bobbins, which do not twist together. Experts call this element of production roving. Before the bobbins go into action, the fiberglass is lubricated with a resin containing substances that polymerize it at high temperatures. Gradually, the material will harden, and this effect is achieved due to the chemical reaction that has occurred. Then the fiberglass passes through filters that free the material from excess resin, and the AKS takes on the usual cylindrical shape. Until the reinforcement has hardened, a special bundle is wound on it in a spiral. It is he who provides strength in contact with concrete. Due to this property, fiberglass reinforcement is increasingly used for the foundation. The reviews that builders leave are often positive.

After all the manipulations, the AKC passes through the furnace, where, at high temperature it hardens. Next, the finished reinforcement is cut into pieces of the required length (they are called whips). Sometimes AKC is wound on bobbins, but this is possible only if it has a small diameter. Thick lashes are simply impossible to twist. Such fiberglass reinforcement, the use of which is very common, is produced in large quantities when it comes to large-scale production.

The method of winding is most often produced. They are made according to the same principle as the lashes. Fiberglass impregnated with resin is wound onto a special machine. The winding device, due to its rotation, makes it possible to obtain a cylindrical surface. The fiberglass is then passed through a high-temperature oven and cut into tubes of specified dimensions.

The manual method is most often used in small batch production. Fiberglass reinforcement, the disadvantages of which do not so much affect the final result, allows you to get a durable car body, bumper, etc. Craftsmen create a special matrix with a pre-applied decorative and protective layer. Typically, a spray is used for this, which allows you to achieve a uniform effect. After that, glass material is laid on the matrix, which is cut out in advance according to the required dimensions. Glass cloth or glass mat is impregnated with a mixture of polymer resin. It is best to use a brush. With the help of a roller, the remaining air is squeezed out of the material so that there are no voids inside the fiberglass. When the fabric has hardened, it is cut, given the desired shape, holes drilled in it, etc. After that, the matrix can be reused.

Characteristics

Fiberglass reinforcement is characterized by the following parameters:

• winding step;
• inner and outer diameter.

Each profile number has its own value of indicators. The only parameter that remains unchanged is the winding step. It is 15 mm.

According to TU, fiberglass reinforcement, the characteristics of which differ depending on the profile, are produced under the following numbers: 4, 5, 5.5, 6, 7, 8, 10, 12, 14, 16 and 18. These values \u200b\u200bcorrespond to the indicator of the outer diameter. The weight of the profiles varies from 0.02 to 0.42 kg / 1 l. M.

Views

Construction fittings come in many varieties. There are classifications that subdivide it into:

• piece;
• mesh;
• frames;
• constructions.

The fittings are also divided into groups:

• working;
• distribution;
• assembly room;
• reinforcement used in reinforced concrete structures.

In addition, rods are divided into longitudinal and transverse, smooth and round, fiberglass and composite, etc.

Scope of application of composite reinforcement

The scope of application of the material we are considering is quite wide. Very often composite reinforcement (fiberglass) is used for the foundation, namely for reinforcing elastic foundations. In this case we are talking about the production of road slabs and slabs. Reinforcement with fiberglass reinforcement is used for the production of conventional concrete structures, drainage pipes, dowels, etc. With its help, they improve the characteristics of walls, make flexible connections between brickwork... AKS is used to reinforce car cloths, embankments for a weak base, monolithic concrete etc.

Transportation

Fiberglass reinforcement comes in the form of coils that can be rolled up. This became possible after the manufacturers removed the self-tightening ties. The AKS coils can be easily deployed, after which the fiberglass is straightened and becomes suitable for work.

The material is packed and transported horizontally. The main thing during transportation is to follow the basic rules for the transportation of goods.

Comparison of fiberglass reinforcement with steel

AKC's main competitor is steel reinforcement. Their characteristics are in many ways similar, but in some respects, fiberglass is clearly superior to the usual type of metal equipment.

Let's compare fiberglass with steel according to some parameters:

1. Deformability. - elastic-plastic, AKS - ideal-elastic.

2. Ultimate strength: steel - 390 MPa, fiberglass - 1300 MPa.

3. Coefficient of thermal conductivity. In the first case, it is equal to 46 W / mOS, in the second - 0.35.

4. Density. Steel reinforcement has a value of 7850 kg / m 3, AKS - 1900 kg / m 3.

5. Thermal conductivity. Fiberglass is not thermally conductive, unlike steel.

6. Corrosion resistance. AKC is a stainless metal, steel corrodes relatively quickly.

7. Ability to conduct electricity. Dielectric is fiberglass reinforcement. The disadvantages of steel rods are that they are 100% current conductors.

This type of composite rebar is used in many construction worksah, but more often it is used when working with concrete to increase strength. The materials manufactured at our factory not only help to improve the reliability of the structures being built, but also reduce construction costs.

You can profitably use fiberglass reinforcement at various stages of construction, namely:

Use in foundation slabs allows you to keep the step of reinforcement similar to metal fittings due to the fact that in this type of products the equal-strength replacement of metal products with fiberglass is completely preserved. And this despite the fact that the joints of the reinforcing frame are overlapped. The weight and ease of handling this material can significantly save installation time.

Use in strip foundationswill give us up to 45% savings on material replacement costs. The reinforcement cage in the strip foundation is knitted with knitting wire, or on our recommendation ...

in concrete floorsaccording to the installation principle, it is no different from concrete floors using metal. Cutting fiberglass reinforcement is best done with a grinder. Remember the peer replacement rule!

Use of fiberglass reinforcement in blind areawill give our brainchild absolute immunity to corrosion and increase protection against cracking.

Usingin armopoyaseblock and / or brick walls gives unsurpassed seismic resistance and good protection against destruction with uneven shrinkage of the building.

Use in monolithic construction significantly increases the life of the entire structure as a whole due to the non-corrosiveness of monolithic concrete. Prevents the formation of chips and cracks in the structure.

Trading and manufacturing company Nano-SK produces and supplies to the Russian market of building materials a large number of goods made of composite materials, however, the lion's share of attention in our production is paid to the production of fittings, which can be bought directly from the conveyor of our plant at a favorable price and very inexpensively. The highest requirements set forth in state and international standards are imposed on the quality of this material. The products manufactured at our factory fully comply with them, which is confirmed by certificates.

Interesting fact!

If you use reinforcement from Nano-SK in the road slab, then the durability of the road will increase, and the number of required renovation works will shrink.

Even with a small diameter of the bar, fiberglass reinforcement is significantly superior to metal counterparts. The metal version of the reinforcement is capable of providing greater strength exclusively with an impressive diameter and, as a result, greater weight, which complicates work and transportation.

By purchasing our products, you get quality products with excellent characteristics, the compliance with which is guaranteed by the manufacturer. The use of products from Nano-SK will increase the service life of buildings and structures. Thanks to cooperation with many transport companies, the order will be delivered anywhere in the country.

Interesting fact!

Buildings and structures reinforced with polymer reinforcement save their owners about 30% on the operation of the structure.

Our products make it possible to significantly reduce the duration of work and decently reduce the cost of reinforcement. When using metallic materials, the cost of reinforcement will be higher on average from 30 to 60%. Thus, we provide our clients with the opportunity to save on construction costs.

The range of our products is one of the main indicators of our capabilities. In our factory you can order fittings with a periodic profile and fittings with sand spraying. Composite products are always popular among our customers and buyers.

You can also purchase fiberglass rods of special chemical composition, basalt and carbon fiber reinforcement.

Interesting fact!

Fiberglass reinforcement has a thermal conductivity 100 times lower than steel.

Our production uses innovative equipment, and a wide range of products is constantly expanding. First of all, we are trying to develop the production of the most irreplaceable and demanded building materials, which include composite fittings. different types... We are one of the leaders in the production of this material in our country and successfully compete with well-known foreign companies.

Our products overshadow their metal counterparts. This is characterized high reliability and the quality of the fittings we produce. Each individual batch is carefully checked for compliance with the high quality requirements set out in regulatory documents, and receives its own certificate.

Interesting fact!

If we compare composite reinforcement and steel, then in terms of tensile strength carbon steel actually loses to composites by 2.5 times.

For this, test pieces of reinforcement are regularly subjected to rigorous tests under harsh conditions. Nano-SK technologists are working on further increasing the quality of manufactured products, and especially with regard to increasing strength.

The materials produced by our company are used for the construction and installation of objects using concrete. Most often, composite products are used when working in areas with seismic activity, since the structures located in these areas must be resistant to earthquakes. In addition, valves of our production are used in industrial and agricultural facilities, it is also used in railway works and the construction of highways.

Interesting fact!

To date, composite reinforcement has been loved and actively used not only in the house-building and road industries, but also in shipbuilding, aircraft construction and railway construction.

Our composite materials are excellent for making concrete slabs and intermediate floors urban planning objects. Being resistant to moisture, fiberglass reinforcement is indispensable for arranging structures located near the coastline. Our materials are purchased for farms... Our composite reinforcement is excellent for pouring concrete, therefore it is indispensable for the installation of structures with increased strength, including industrial buildings.

The main and main advantage of fittings from Nano-SK is resistance to a variety of aggressive and harmful influences. It also does not undergo mechanical damage, does not break, is not prone to corrosion and mold damage.

An important advantage is its high resistance to the effects of strong chemicals, including acids and alkalis.

Interesting fact!

High corrosion resistance and active protection against chemicals allows the use of composite reinforcement in places exposed to the influence of aggressive environment.

Our company has a flexible pricing policy. The service life of our products significantly exceeds the service life of metal products.

Choosing plastic fittings, you make a completely reasonable and justified choice, reducing the cost of building materials in several directions at once, saving your time and at the same time getting advantages that you simply cannot turn a blind eye to:

• Simplicity, lightness and economy during transportation

Fiberglass reinforcement is much lighter than metal reinforcement, this property should and will be considered an advantage, allowing it to be used even in lightweight structures, for example, from porous concrete in the appendage, reducing the weight of the entire structure by 5-7 times.

Interesting fact!

Did you know that all polymer reinforcement has a lower density in comparison with metal and therefore it is 4 or more times lighter than similar steel reinforcement.

• Saving money on the subsequent insulation of the structure

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 floors on corrugated board;
• roads and road construction;
• in land management (for example, coastline strengthening).

Benefits of fiberglass reinforcement

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

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

There are 8 coils in the car (ASK 10 - Ø 10 mm) of 50 m each, which are necessary to fill the foundation of 1 house

Moreover, the total weight of 400 meters of reinforcement is about 48-50 kg and is easily loaded by 1 person in 10 minutes.

For more dense placement during transportation, we make coils of different diameters. For example, 2 coils 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 glass fiber "Advantex" by "Owens Corning", which meets the highest European standards.
• Here you can buy fiberglass fittings with a diameter of 4, 6, 7, 8, 10, 12 and 14 mm in coils of 50 and 100 meters.
• Reinforcement thicker than 14 mm can be produced on special order.
• Resistance to chemical and mechanical stress - can be stored for a long time (fiberglass retains its properties for more than 80 years).
• We can start up 800,000 meters of rebar per month. There is always a stock in the warehouse from 20-60 thousand rpm. of various diameters for implementation.

Prices for fiberglass reinforcement VZKM

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

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

Wholesale prices for fiberglass fittings

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

Get a wholesale price tag for rebar possible by phone request

Today at construction industry new technologies appear and modern materials, while reinforced concrete structures remain the most demanded in construction. Cheaper and high quality composite products have replaced metal fittings. Reinforcement of concrete with composite reinforcement without the use of steel elements allows to achieve not only savings, but also to obtain more durable and resistant to external environment constructions. Moscow plant of polymer composite structures offers buy fiberglass fittings in Moscow and any other city in Russia.

Fiberglass reinforcement is a long product of circular cross-section with spiral winding. Reinforcement is made of filler (solid glass fiber) and matrix (hardened thermosetting or thermoplastic polymer). Fiberglass or basalt thread is used for wrapping.

The product is widely used for reinforcing concrete, embankments, slopes of roads, railway tracks, steep banks (gabions), in load-bearing structures of submersible dowels. The use of composite reinforcement is especially effective in places of increased exposure to an aggressive environment, where steel will not last long. it monolithic structureserected in winter period, when substances that prevent freezing and accelerate hardening or foundations at the groundwater level are introduced into the concrete composition. It is also advisable to reinforce road slabs with fiberglass, which will be treated with anti-ice reagents in operation.

Why us?

Delivery is free!

When ordering from 10,000 rpm in the betrays of Moscow and the Moscow region!

Best price

We are a manufacturer, our prices are more delevelier than dealers + we give a discount on the volume!

Quality

Our products have been successfully tested and have a certificate of conformity.

Technologies

We are constantly improving the technology for the production of composite materials.

Not so long ago, fiberglass reinforcement began to be introduced into construction technologies. Officially for its production in the Russian Federation, an interstate standard was adopted only in December 2012. Now it is domestic, not inferior in quality to foreign brands composite rebar, can be bought in Moscow. New material almost immediately became popular due to its low cost, which on average is half that of steel, and a number of technological characteristics.

Advantages of fiberglass reinforcement over steel counterparts

• The lightness of the product allows you to save on the cost and time of transportation, loading and unloading.
• Corrosion resistance makes the material suitable for use in aggressive environments and storage in open areas.
• Tensile strength is double that of steel reinforcement.
• Due to its coiled ribs, AKSp reinforcement has excellent adhesion to concrete.
• Low thermal conductivity makes the material attractive for the construction of "warm" houses.
• The coefficients of thermal expansion of fiberglass and concrete are equal, therefore, the integrity of the structure is preserved during temperature drops.
• During assembly, the structure is connected with knitting wire or ties, so there is no need to use a welding machine.
• The material is environmentally friendly.

Some argue that composite rebar has the disadvantage of being too resilient and brittle when flexed strongly. But given the technological purpose, these characteristics do not matter, since the reinforcement inside the concrete must work in tension, in which it significantly surpasses steel counterparts.

The products manufactured at our plant comply with GOST 31938-2012, and the quality is confirmed by test reports and certificates.

When purchasing more than 10 thousand meters in Moscow and the region, delivery is free. Reinforcing bars up to Ø12 mm inclusive are delivered in coils, and above - in whips of 6 m. If necessary, you can order cutting of 3, 4, 5 or 6 m.

Our company is a production organization, so we offer to buy fiberglass fittings at the manufacturer's price, as well as wholesale from 1000 rpm at an even more favorable cost. We will be glad to long-term cooperation and consider your suggestions.