How to cut glass reinforcement

How to cut rebar - cutting tools

When constructing various structures, concrete is almost always used, reinforced with reinforcement, which is metal rods of various diameters.

Reinforcing bars are:

• Manufactured by hot-rolled method (A-1 ÷ A-7);
• Strengthened by thermomechanical treatment (At-1 ÷ At-7).

You should know that the higher the class, the better the strength properties of the reinforcement. Moreover, products of class A-1 or At-1 are easily recognizable, since they have a smooth surface and a round cross-section. Reinforcement of other classes is multi-profile and has a ribbed surface.

Rebar cutting tools

Reinforcing bars are produced in lengths ranging from 6 to 12 m, so it is important to know how to cut rebar. First of all, you need to understand that the smaller the class and diameter of the rod, the easier it is to make workpieces of the required size. It is very important to use a quality cutting tool.

For these purposes you can use:

• Special reinforcement shears (only in cases where it is necessary to cut class A-1 reinforcement with a diameter of no more than 12 mm);
• Hand hacksaw for metal;
• Electric saw (“grinder”);
• Miter saw (“guillotine” for reinforcement);
• Gas cutter.

Rebar shears or a hand saw can only be used to cut small quantities of rebar.

Important! If you use manual cutting methods, then there is absolutely no need to saw through the entire rod. It is enough to make a notch about a third of the diameter of the rod and bend it, using some kind of handy lever for this.

For cutting high-grade reinforcing bars with large diameters, an electric saw called a “grinder” is most often used. When working with it, you need to have certain skills and always follow safety rules. As protective equipment, you need to use special glasses, a helmet, a special apron and gloves. The main advantage of the “grinder” is that it can be used anywhere.

Rules for cutting reinforcement with a grinder

The rules for safe cutting of reinforcement with a grinder are as follows:

• The reinforcing bar must be raised above the ground during cutting so that the disc does not catch on the surface;
• The rod being cut must be fixed. To cut long rods, as a rule, you need an assistant.

The most convenient way to cut reinforcement is to use a special electric miter saw called a “guillotine.”

It consists of:

• Fixed base;
• A moving part with a mounted cutting disc that can be lowered and raised.

Pre-marked reinforcement is placed on the base under a movable disk, which is smoothly lowered. Then the disk rises again, the reinforcement is pulled to the completed mark and the disk is lowered again.

The only drawback of the “guillotine” is its high cost, so most often this equipment is purchased by specialized companies. But at the same time, it is always possible to rent a miter saw.

Many specialized companies offer cutting services when purchasing reinforcement. In order to attract customers, cutting of a small number of reinforcing bars is often carried out free of charge. A large amount of reinforcement is cut according to prices approved by the enterprise, which, first of all, depend on the thickness of the rods.

The benefits of cutting reinforcement when purchasing are as follows:

• Elimination of the need to order a special vehicle for transporting oversized cargo. The cut pieces can be easily transported by your own transport;
• The ability to immediately begin work on the construction site, since you will not need to waste time searching for equipment and cutting reinforcement.

Source: https://postroy-dom.com/fundament/233-kak-rezat-armaturu-instrumenty-dlya-rezki.html

How to bend fiberglass reinforcement

The question of how to bend reinforcement not only in production, but also at home, is of interest to many of those who independently engage in construction on their own plots. The relevance of this issue is due to the fact that the reliability and durability of erected buildings and concrete structures for any purpose largely depend on the correct implementation of this process.

Reinforcement of grillage corner using bent elements

Why is it necessary to bend reinforcement and how best to do it

As is known, concrete structures do not tolerate bending loads well, under the influence of which they begin to collapse.

To avoid such negative consequences, concrete structures are strengthened using frames made of steel rods, and more recently, composite reinforcement has been used for the same purposes.

Without a reinforcing frame, it is almost impossible to make a reliable foundation for any structure, as well as concrete structures that experience mechanical loads during operation.

The weakest points in any reinforcement frame are the joints of the bars, which is especially important for corner connections, the creation of which by crossing straight reinforcing bars is a serious violation of technology.

Strengthening the reinforcement frame using bent rods

Corner sections of the reinforcing frame, formed in such an incorrect way, significantly weaken the concrete structure and can lead to its delamination.

That is why for such connections it is necessary to bend and lay the reinforcement in such a way that an overlap of at least 80 cm is formed on each rod adjacent to it.

 Bent reinforcement elements are used not only to create frames for the foundation, they are also used as connecting elements that are operated under the influence of tensile loads (hooks for various purposes, tabs, etc.).

Only specialists know how to bend reinforcement in such a way that it does not lose its original strength characteristics. It is important to keep in mind that you can only bend metal reinforcement with your own hands, but not composite materials (information on how to cut fiberglass reinforcement can be found at the end of the article).

Minimum bending radius of reinforcing bars

Bending reinforcement to obtain a reliable frame for the foundation should be performed only mechanically, avoiding the formation of sharp corners at the bending site. The radius of curvature of the rods, which is formed at the bending point, should have a value in the range of 10–15 diameters of the product itself.

Those who bend reinforcement with their own hands often make the following gross mistakes:

• make a notch or cut the bend to make your work easier (such a cut, breaking the structure of the metal rod, significantly weakens the structure of the frame);
• the place where it is necessary to bend is preheated using a blowtorch or by placing the rod in a fire.

After making a cut or heating the rod at home, it is usually bent using improvised means - a sledgehammer, a hammer, a piece of pipe, etc.

Naturally, all such procedures lead to weakening and destruction of the reinforcement structure.

To preserve its strength characteristics, it is necessary to bend the elements of which it consists only in a cold state and without violating the integrity of their structure, unless this is additionally specified in the design documentation.

Devices for bending reinforcing bars

Quite a lot of devices and simple machines that allow you to bend any reinforcement with your own hands have been invented. All such devices operate on a similar principle, and their differences lie in the design and technical characteristics, the most significant of which is the largest diameter of the bending rod.

Operating principle of reinforcement bending machines

The reinforcement that needs to be bent is fixed on such a machine between two rollers: central and thrust. The bending process itself is carried out due to the influence of the third roller on the rod, which is called the bending roller.

By acting on the rod during bending (it can be done either clockwise or in the opposite direction), the bending roller allows you to obtain the required bending angle on the product.

The thrust roller or shaft performs a limiting function; thanks to it, the reinforcement is not deformed along its entire length, but only in the place where it is required to form a bend.

Source: https://betfundament.com/kak-gnut-stekloplastikovuyu-armaturu/

How to cut fiberglass reinforcement?

One of the advantages of using fiberglass reinforcement is the ability to cut the workpiece to the desired size, which makes production virtually waste-free. But here a completely logical question arises - how to cut fiberglass reinforcement and what safety rules should be followed at the time of cutting.

There are the following options for cutting fiberglass reinforcement:

• chopping with an ax;

• “biting” with a bolt cutter;

• sawing with a metal saw;

• cutting with an angle grinder, otherwise an angle grinder.

Grinder and hacksaw

The most effective, practical and accurate way of cutting fiberglass reinforcement is cutting with a grinder equipped with a standard diamond or abrasive disc. The use of a hacksaw for metal in such types of work is justified only when a small amount of work is planned. Otherwise, if it is necessary to make a large number of cuts, the master’s hand gets tired, and the productivity and quality of work decreases.

Bolt cutter and ax

As for chopping fiberglass reinforcement with an ax and cutting it with a bolt cutter, these two methods have significant drawbacks. Their main disadvantage is the negative impact on the reinforcing bar at the cut site.

As a result, deformation, splitting and crumbling of the material may occur. Thus, the ends of the workpiece have a split appearance.

Longitudinal cracking of the product, in turn, complicates its further use and shortens the service life of the reinforcement structure.

Defects invisible to the naked eye, which are longitudinal cracking in nature, penetrate into the depth of the rod. This kind of crack will later become a place for the accumulation of alkali, water, cement, dirt, when the reinforcement is poured with concrete. They also act as capillary channels for the penetration of these deposits into the rod.

The main danger of such defects at the ends of the reinforcing workpiece is subsequent, more abundant and deeper cracking of the product during strong temperature changes, at the stage of freezing and thawing. When concrete mortar gets into cracks, the destructive negative effect of the alkaline component of concrete on the core of the fiberglass product increases. The consequences of such an impact manifest themselves from inside the reinforcing bar.

Precautions when cutting (dividing) fiberglass reinforcement

At the stage of processing fiberglass products, it is important to take precautions, including protecting the respiratory tract, eyes and hands from splinters and dust.

A special protective mask, worn at the stage of cutting the reinforcement, will protect the craftsman’s lungs from basalt and glass fibers from dust, which will negatively affect the condition of the respiratory tract.

An alternative to a mask can be a respirator, which must be securely fixed to the face. It is important to ensure that dust particles do not enter the respiratory tract bypassing the air filter element.

You can protect your eyes with special glasses. Hands must be protected with gloves. It is worth knowing that the thickness of the basalt glass is similar in thickness to a human hair. In order to protect the skin of your hands from such particles, standard fabric gloves are not suitable. When cutting rebar, you should use cotton gloves with a latex layer, or even better, silicone gloves. The ease of cutting also differs with different diameters of fiberglass reinforcement.

Source: https://nano-sk.com/chem-rezat-stekloplastikovuyu-armaturu

How to bend composite reinforcement

The advantages of fiberglass and other composite reinforcement have been appreciated in construction and production. light weight, high tensile strength, immunity to corrosion and aggressive environments. Thanks to the above characteristics, this material is actively used and allows saving on the construction of a reinforcing frame compared to the use of steel rods.

Despite the obvious advantages, there are also a number of known disadvantages, due to which the use of this material is often not possible.

Bending of composite reinforcement

Manufactured composite rods cannot be bent directly on the construction site - after removing the load, the reinforcement will return to its original state. The composite that binds the fibers of the rod cannot be re-cured, so the reinforcement will either retain its original shape or collapse under load.

There are two options to solve this problem:

• an order for the production of fiberglass reinforcement from the manufacturer according to the customer’s drawings. At the production stage, composite rods can be given absolutely any shape that will be preserved;
• use of a hybrid frame with a combination of composite and metal rods. This option of connected frames is quite common in reality and is completely justified.

Welding composite rods

Fiberglass rods cannot be electrically welded. In field conditions, this problem can only be solved by gluing products or using other methods of connecting elements - clamps or plastic clips.

But electric welding of fiberglass reinforcement is still possible. This problem is solved by installing special steel tips, which act as the welded element. The tips are factory installed and attached to the rod using special collet clamps. This method allows you to weld or prestress a fiberglass element.

Thus, there is a real solution to the problems that may arise during the operation of composite reinforcement.

Despite the inconveniences that arise, fiberglass reinforcement is the optimal solution for low-rise construction, in which none of the structures are subject to significantly high loads.

Reinforcing foundations with fiberglass rods significantly reduces labor costs for installation and construction of the structure, and allows saving on the cost of building materials.

The technology for the production of fiberglass reinforcement was developed back in the 60s of the 20th century, but only at the beginning of the new millennium did it become possible to make it truly accessible and inexpensive. This year, GOST 31938 was adopted for composite polymer reinforcement of concrete structures.

In accordance with GOST standards, the nominal diameter of composite materials is from 4 to 32 mm. The most popular are reinforcement with a cross section of 6, 8 and 10 mm. It is especially convenient to purchase long-length composite reinforcement materials in compact and lightweight coils.

In accordance with GOST, defects in the appearance of the reinforcement are unacceptable. Chips, dents and delaminated areas are a sign of poor quality products.

Are there any disadvantages to fiberglass reinforcement?

It is unreasonable to expect absolute perfection of any building material. There is no perfection in the world and there cannot be. The numerous advantages of TSA have a downside that must be taken into account.

• The statement about the high cost of ASP is true only if you compare fiberglass and steel reinforcement of the same diameter. However, manufacturers claim that composite reinforcement of a much smaller cross-section is used in construction. A fiberglass diameter of 6 mm replaces a steel rod with a cross-section of 10 mm, and 10 mm ASP corresponds to 16 mm of steel reinforcement.
• The resistance of fiberglass reinforcement to high temperatures is lower than that of steel reinforcement. The maximum heating level is 200 degrees. This boundary is quite sufficient for low-rise or road construction. It is difficult to imagine a situation where in these types of construction it would be possible to heat the reinforcement to a higher temperature.
• It is impossible to bend and fix fiberglass reinforcement at an angle on your own. All bends must be done in the factory.
• The modulus of elasticity at fracture is less than that of steel. This limits the use of fiberglass in construction. Concrete is most often subjected to tensile loads, but is designed to resist fracture, for example in floor slabs.
• Difficulties arise when constructing a rigid frame from reinforcement. The movable and flexible fiberglass frame is sensitive to vibrations that occur during operation of the mixer. When pouring concrete, the reinforcement may “jump off” and move to the floor or walls of the pit.

Having clearly understood the “weak” and “strong” points of fiberglass reinforcement, you can choose areas of construction where its use is justified, appropriate and very profitable.

• When constructing slab and strip foundations buried below the freezing level on hard soils. Floating weak soils cause an increase in fracture load, which fiberglass reinforcement tolerates worse than steel.
• ASP is in demand for reinforcing brick and block structures. Not only are walls reinforced with fiberglass, but they are used to create a flexible connection between the facing wall and the load-bearing wall.
• For arranging flexible connections in multilayer panels.
• It is ideal to use fiberglass reinforcement in load-bearing parts of structures exposed to increased corrosion hazard from water or chemically aggressive reagents. When strengthening coastal structures, for the construction of swimming pools, drainage systems, and road surfaces, the use of fiberglass is extremely effective.
• Glued-laminated wooden beams are reinforced with fiberglass, increasing their rigidity.
• With the help of composite reinforcement, light and strong, non-conductive power transmission line supports are created.

Reasonable and thoughtful use of composite reinforcement can increase construction efficiency and significantly reduce costs.

— FIBERGLASS FITTINGS

Being inside building materials, reinforcement significantly increases their strength. It is a collection of metal elements that are connected to each other. In a word, reinforcement is a strong frame inside a building material.

For a long time, reinforcing bars were used only for the production of reinforced concrete. Impressive tensile strength is the main advantage of reinforced concrete structures.

Concrete alone could not boast of this quality, so Joseph Monier in 1867 came up with the idea of ​​​​sewing reinforcement into it.

https://www.youtube.com/watch?v=ODNPoO5-axA

After this, concrete and reinforcing bars became friends for centuries. They began to make ready-made structures from reinforced concrete: stairs, blocks, lintels, etc. Their use is very convenient when building cottages made of brick or large blocks. Reinforcement is also used for the foundation. Its masonry must be as strong as possible, because this is the basis of the structure! Reinforced concrete has been performing this task perfectly for many years.

Steel is mainly used for the manufacture of fittings due to its high strength and resistance to corrosion.

Plus, steel rods guarantee excellent adhesion to concrete. Not long ago, fiberglass began to be used as a raw material for reinforcement. This material is no different from steel in its technical characteristics, and even surpasses it in some ways. Steel reinforcement bars come in different cross-sections (from 6 to 40 mm). Profiled reinforcement is also found: in the form of corners, channels, I-beams, etc.

In private construction, reinforcing bars with a diameter of 8 to 16 mm are used.

To build a country house or a small cottage, it is best to buy fiberglass reinforcement, because it is much lighter, is a dielectric (does not conduct current), is cheaper than metal and does not obscure radio waves.

When choosing the diameter of the rod, you don’t have to fool yourself - you need to take A5 class reinforcement with 10 or 12 mm in diameter, although it is expensive, it will last for many, many years. There are 6 quality classes of fittings in total: from A1 to A6.

As the class increases, strength and cost increase.

Share the link - this is the best motivator for us

For some, self-construction means not only constructing buildings with your own hands, but also preparing the materials yourself! Such comrades always have a question: How to bend reinforcement? . This issue cannot be ignored, so we will tell you how to do it.

There are 2 main ways:

Lever arm. Take two strong, long pipes. One is firmly attached to the ground, and the other should remain free. A reinforcing rod is placed in a fixed pipe, and another pipe, like a lever, bends it.

Blowtorch and hammer. To begin with, the reinforcing bar can be completely secured. Then, using a blowtorch, the bend area is heated and bent with a hammer in the desired direction.

It should be taken into account that the process of bending reinforcement is very labor-intensive: a complete routine and lack of dynamics. Therefore, you need to approach this work seriously and conscientiously.

Source: https://kamtehnopark.ru/kak-sognut-kompozitnuu-armaturu

Is it possible to cut glass with a grinder? — Metals, equipment, instructions

• 1 Is it possible to cut glass with a grinder?
  • 1.1 How to cut glass correctly with a grinder
  • 1.2 Cutting glass with a grinder
• 2 How and with what to cut plexiglass at home
• 3 How to properly cut various materials with a grinder
• 4 How to properly cut metal, tiles, plexiglass and wood with a grinder - Angle grinder safety precautions!

Glass. How to cut, saw, drill, grind.

Not everyone knows, I would even say. Most, most, drill, cut, saw and grind glass with your own hands. I would like to fill this common rumor gap.

Glass was invented a very long time ago. It was definitely already used in Egypt. I think the Egyptians had difficulty processing glass. Previously, processing glass perfectly was a problem for the home craftsman. However, now in stores there is at least some necessary tool, with which the tricky repairs are not terrible.

Glass is still cut to this day. glass cutter. It consists of a handle-holder and a cutting element. carbide wheel. The professional glass cutter contains a technical diamond. They are even more convenient to work with, and the quality of the lines drawn with a diamond glass cutter is much higher, this is especially true when cutting shapes.

It’s easier to cut straight strips . You need a ruler or rod. To prevent the ruler from slipping when cutting, I recommend gluing a narrow rubber strip on the inside. We need to make a straight scratch on the glass with a glass cutter. Hold the glass cutter straight.

and we go through the entire length of the cut with similar pressure at a time. it is fundamentally! You will have to practice and draw the cutting line the first time . Additionally, there is an option to moisten the sponge with kerosene and, before cutting, run the glass cutter along the sponge. this helps cut glass more accurately.

After scratching the glass, we begin to moderately tap the glass along the entire length of the strip to feel that the scratch has turned into a crack. There is an option to lightly tap the glass cutter on the back of the cut. Then we put the glass on the edge of the table and jump sharply down, breaking it. If the glass does not break very well and pieces remain, it is not a failure. We break them off with a special cutout from a glass cutter.

How to cut glass correctly with a grinder

Hi all! To solve this issue, in a small video tutorial I will show you how to cut glass with an angle grinder ! For cutting use.

Cutting glass with a grinder

Here is a video, for the sake of experience, I decided to try processing the edge of glass using grinders.

Figure cutting is done using the same method, but unfortunately it is even more complicated. Also, in one motion, you need to draw a cutting line. A cheap roller glass cutter is not a good assistant in this matter; the glass will start to break at any rate. Therefore, find a diamond glass cutter or, as a last resort, a high-quality roller cutter with silicone lubricant.

How to make a hole in glass ? It's difficult for you though. You need a diamond drill, also called a diamond bit, which can be used to cut holes up to 80 mm in diameter.

For anything that is not just this diameter, you will have to use a glass cutter. We draw a circle with it and tap it (you can make a template or use, for example, a saucer).

We draw a few moderate lines along the diameters of the circle, so you might think you are cutting a pie. Be sure to tap.

Depending on the diameter, place it on a mug or pan and knock it out with a hammer. It’s better to practice cutting glass, because you may not succeed first time

But sawing glass is easier. It is perfectly “taken” by the diamond disc of an angle grinder, also called. Bulgarian Be sure to use water, the cut will be smoother, and the expensive disc will shrink less.

You can also cut with a hacksaw. However, with a special blade - made of tungsten carbide. Such canvases are now easy to purchase at any hardware store or trade. Also, drink with water. Let the assistant pour a narrow stream to where you are sawing. There is an option to cut a beer bottle, for example, for fifteen. 20 minutes.

How to process the edge of glass . After cutting the glass, a sharp edge remains and you can cut yourself on it like a razor. However, this can simply be eliminated using an emery machine, or a sharpening stone for straightening knives, or sandpaper. If desired, the glass cut can be polished like metal. And the development is the same. small sandpaper and GOI paste. For greater effect, etch the sanding area with hydrofluoric acid.

It's much easier to drill glass . Drills with a Pobedit drill and an ordinary drill for metal, with water. For example, make a round fence one centimeter high from plasticine around the drilling site. Pour water in there and drill.

Alas, it is better to purchase special drills for glass; at the moment there are no problems with this, and in addition they are cheap. Be sure to drill with water. The edges turn out to be very careful, only at the end of drilling, we practically do not press on the drill, in order to cause chipping.

I can advise you to glue a circle of masking tape or adhesive tape to the back of the glass.

And remember about safety precautions - safety glasses and gloves.

Source: https://spb-metalloobrabotka.com/mozhno-li-razrezat-steklo-bolgarkoy/

Knitting fiberglass reinforcement for the foundation: we reinforce it correctly

The popularity of the question of how to most correctly knit fiberglass reinforcement to strengthen the foundation and other concrete structures is due to the fact that this material is increasingly beginning to be used in both capital and private construction. Many of those who are going to use this innovative material are also interested in the question of how effective its use is for reinforcing the walls of buildings built from block building elements.

The reinforcing frame of a slab foundation is one of the areas of use of fiberglass reinforcement

The history of the appearance of fiberglass reinforcement in construction

Fiberglass reinforcement is actually not new to the construction market; it was developed and began to be produced back in the 60s of the last century. However, its high cost at the time of the start of production contributed to the fact that it was used for reinforcing only those structures in which steel reinforcing elements were subject to active corrosion: concrete structures operating in harsh climatic conditions, bridge supports, etc.

Fiberglass reinforcement will be the best solution for the construction of concrete structures in contact with sea water

The active development of the chemical industry has led to the fact that over time the cost of production of fiberglass reinforcement has decreased significantly, which has made it possible to begin to use it more actively. The widespread use of this material was facilitated by the fact that in 2012 a state standard (31938-2012) was approved, according to which requirements are determined not only for production, but also for testing methods of fiberglass reinforcement.

According to the requirements of the above regulatory document, reinforcement made of fiberglass materials can be produced in the diameter range from 4 to 32 mm. But the most widely used, especially in low-rise construction, are products with a diameter of 6, 8 and 10 mm. Unlike similar steel products, fiberglass reinforcement is supplied to the customer not in the form of individual rods, but wound into coils.

SP reinforcement: comfortable, light, stable and elastic

In addition to the technical characteristics of fiberglass reinforcement, the regulatory document specifies requirements for the condition of its external surface. According to these requirements, chips, delaminations, dents and other defects are not allowed on the surface of such products.

Material characteristics

Reinforcement made from composite materials, depending on the continuous reinforcing filler used for its manufacture, is divided into several categories:

• glass composite, which is abbreviated as ASC;
• carbon composite, designated AUK;
• combined or ACC;
• and a number of other categories.

Physical and mechanical parameters of polymer reinforcement of various types

When choosing composite reinforcement to strengthen the foundation or walls of building structures being built, you should take into account its main characteristics:

• the maximum temperature at which these fittings can be effectively operated;
• the tensile strength of the product, measured in tension; this parameter is calculated as the ratio of the applied force to the cross-sectional area of ​​the reinforcing bar; for products of the ASK category it must be at least 800 MPa, and for AUK reinforcement - at least 1400 MPa;
• tensile modulus of elasticity; for carbon composite reinforcement this indicator exceeds the similar characteristic of fiberglass products by more than 2.5 times;
• the tensile strength of a product, measured during its compression; for all types of composite reinforcement this indicator must be at least 300 MPa;
• tensile strength of reinforcement, measured in cross section; for various types of composite reinforcement this indicator should be: for ASK reinforcement - 150 MPa or more; for AUK - more than 350 MPa.

Reinforcement made of metal or composite materials?

When deciding which reinforcement to use to strengthen the foundation or walls of a building, you should compare the characteristics of traditional metal and fiberglass products. Compared to metal ones, fiberglass reinforcement has the following advantages:

• exceptional resistance to corrosion: a foundation reinforced with composite reinforcement is not afraid of interaction with acidic, salty and alkaline environments;
• Having low thermal conductivity, fiberglass reinforcement does not create cold bridges, which is a particularly relevant quality for the operation of buildings in the climatic conditions of our country;
• the materials used for the manufacture of fiberglass reinforcement are dielectrics, therefore the foundations and walls for which it is used are absolutely transparent to radio and electromagnetic waves;
• the weight of composite reinforcement is significantly lower than the weight of products made of metal; the strength of fiberglass reinforcement rods is almost 2–3 times higher than that of reinforcement made of metal;
• due to the fact that composite reinforcement is supplied to the customer in coils of 100–150 meters, when strengthening the foundation with its use, it is possible to minimize the number of joints, which, as is known, are the weakest points in any concrete structure;
• purchasing composite reinforcement is more economical due to the fact that you can buy exactly the volume that you need to strengthen the foundation or walls of your building, without focusing on a fixed length of rods, as is the case with metal products;
• the coefficient of thermal expansion of composite materials is almost identical to that of concrete, therefore, practically no cracks occur in the structures for which they are used for reinforcement.

If we compare the cost, then the costs of using metal and fiberglass products are almost the same.

Comparison of metal and fiberglass reinforcement (click to enlarge)

The most significant disadvantage of reinforcement made from fiberglass is its rather low fracture strength, which limits its use for strengthening heavily loaded concrete structures.

Features of using composite reinforcement

Reinforcement, which is made of composite materials, is mainly used to strengthen strip or slab foundations in low-rise construction. This is explained by the fact that this reinforcement, due to its relatively recent appearance on the domestic construction market, has not yet been studied much and has not been tested by long-term practice of its use.

Before proceeding with the installation of the reinforcement cage, it is necessary to prepare the formwork for pouring the future foundation. This procedure is carried out according to the standard scheme, as in the case of using metal reinforcement. To reinforce strip foundations of small buildings, composite rods with a diameter of 8 mm are mainly used, which corresponds to 12 mm metal products. First of all, meshes are knitted from such rods, from which a reinforcing frame is then mounted.

Fastening the reinforcing mesh using tie wire

When using rods made of composite materials, it is important to know how to knit fiberglass reinforcement so that it forms a reliable frame that effectively strengthens the concrete structure. Elements that will allow you to reliably and correctly tie such a structure can be plastic clamps or ordinary knitting wire. The choice of one option or another depends only on personal preferences and the availability of certain devices at hand.

How to make a reliable frame for a foundation

In order to correctly make a base for a strip foundation for which fiberglass reinforcement will be used, you can watch a training video and use simple recommendations. So, the algorithm for manufacturing such a frame is as follows.

• Before knitting reinforcement, you need to draw up a drawing of your future frame and cut all the elements for its manufacture to exact dimensions.
• The transverse rods of the lower layer of the reinforcement frame are positioned using special clamps. Such elements can be installed both before the assembly of the reinforcement frame begins, having previously measured the size of its cells, and after it is ready.
• The size of the cells depends primarily on the size of the strip foundation that you are going to strengthen. This size can vary within a fairly wide range: 15–30 cm.
• Before knitting, it is better to first lay out the longitudinal bars of the reinforcement skeleton on the ground and make marks on them with a marker in the places where the transverse elements will be fixed to them. When you start knitting the reinforcement, you should make sure that the elements are fixed to each other strictly at right angles.
• Transverse jumpers must be knitted with the longitudinal elements of the frame on their lower side. In order for the reinforcing skeleton and, accordingly, the future foundation to be reliable and stable, plastic clamps or knitting wire at the joints should be knitted more tightly.
• Initially, horizontal layers of the reinforcing frame are made, only then should they be knitted together with vertical jumpers. It is also necessary to fix the vertical lintels on the inside of the frame cells; this will allow you to end up with a reliable and stable structure that will not corrode during the process of pouring concrete and will perfectly perform its reinforcing functions.
• Corners are a special place in the reinforcing structure, and they need to be given special attention. It is not recommended to bend fiberglass reinforcement yourself under the influence of heat, which can have a very negative impact on its strength characteristics. Therefore, it is better to knit the corner elements of the reinforcement skeleton from already bent rods, which can be purchased today, or carefully bend them without exposure to heat.
• After the reinforcement structure is completely ready, it must be carefully placed in the inside of the already prepared formwork.

Scheme of reinforcement of strip foundation corners

Scheme of reinforcement of strip foundation junctions

If you knit elements of the reinforcement frame using wire, then to make your work easier you can make a crochet hook, for which it is convenient to use an old screwdriver. How to make such a hook and knit a reinforcing frame with it can also be found in the corresponding video.

Making a reinforcing frame from rods made of fiberglass is a simple process, as can be seen even from the training video, which shows in detail how to knit it. To work with a material such as fiberglass, you do not need special tools and complex equipment; it is easy to cut and knit, and it is lighter in weight than reinforcement made of metal.

In any case, when choosing such material to strengthen the foundation or walls of your house or building for any other purpose, you should keep in mind that you are doing so at your own peril and risk, since fiberglass reinforcement has recently appeared on the domestic construction market, and its characteristics have not yet been determined. fully confirmed by the duration of use in practice.

Source: http://met-all.org/metalloprokat/sortovoj/kak-vyazat-stekloplastikovuyu-armaturu-dlya-fundamenta-video.html

How to cut composite fiberglass reinforcement for the foundation?

Graduated from the Faculty of Industrial and Civil Engineering ALTI.

One of the main advantages of composite reinforcement is the simplicity of its cutting. Cutting of fiberglass reinforcement is carried out directly at the work site, which significantly reduces construction time. To cut rods to size, use the following tools:

• axe;
• bolt cutter;
• hacksaw for metal;
• angle grinder.

Let's look at the advantages and disadvantages of each tool.

Angle grinder

When the question arises of how to cut fiberglass reinforcement for the foundation (we have already written in more detail about the material itself here), builders first of all remember the grinder. This tool allows you to cut a large amount of material efficiently, quickly and with minimal effort.

The advantages of using an angle grinder include:

• high speed;
• using a grinder you can cut a bunch of rods at once;
• mechanized cutting does not require much muscle strength;
• possibility of using discs with any cutting edge (for metal or stone).

Before cutting fiberglass reinforcement with a grinder, you need to take into account the disadvantages of working with this tool:

• It will not be possible to cut fiberglass with a grinder without dust. The high speed of rotation of the disk leads to the spraying of small particles of fiberglass into the air. Using an air blower to cool the tool's motor further spreads the composite dust. Therefore, when working with an angle grinder, you need to use eye and respiratory protection, especially if you are cutting reinforcement indoors;
• To operate an angle grinder, you must have an electrical connection point.

In general, the disadvantages are quite trivial.

Hacksaw for metal

If you only need to make a few cuts, you can use a regular hacksaw.

The use of hand tools provides the following advantages :

• Every owner has a hacksaw for metal. This is the easiest and cheapest way to cut a small number of rods for a bundle of reinforcement cage;
• no spraying of small particles, as is the case with an angle grinder.

Disadvantages of using a hacksaw for cutting composite reinforcement:

• low speed;
• high load on the employee if it is necessary to perform a large amount of work;
• Possibility of use only in individual construction with small volumes of work.

Source: https://DomZastroika.ru/foundation/chem-rezat-kompozitnuyu-armaturu.html

Safe work with fiberglass reinforcement

Fiberglass reinforcement is a worthy alternative to metal rods. It is easy to use, reliable and durable. When starting to work with the material, it is useful for any craftsman to learn how to properly cut, tie and unwind reinforcement.

How to cut fiberglass reinforcement

Waste-free production is one of the main advantages of composite reinforcement. Unlike metal, it can be easily cut into pieces of the desired length and used without residue.

How to cut reinforcement:
• Bulgarian One disc is enough for cutting with a machine.
• with wire cutters if the reinforcement has a small diameter
• hacksaw for cutting metal

How to bind composite reinforcement

Fiberglass reinforcement is connected not only to each other, but also to metal rods. How to do it? Most often, millimeter-thick knitting wire is used for this purpose.

For large volumes of work, it is convenient to tie rods with wire using a special hand or electric tool. A crochet hook is used for medium-sized work.

If you need to tie a small number of rods, you can do without auxiliary devices and do the work manually.

Staples and plastic clamps are also used for tying reinforcement. Note that the method of tying the rods is not of fundamental importance. the purpose of the procedure is to fix the rods in the desired position before pouring concrete. Once the concrete hardens, the rods will no longer budge. However, the wire or other material for binding must be thick and strong enough - this will ensure the integrity of the frame when concrete is supplied.

How to unwind fiberglass reinforcement

The fittings are supplied in coils and straight rods - both options are acceptable. Rods twisted into a coil are not subject to deformation, as many consumers believe. The appearance of microcracks is possible only if the material is manufactured without compliance with technology. After unwinding, it does not need to be straightened. This will happen naturally.

Reinforcement in a coil should be unwound very carefully, especially with significant thickness of the rods.

How to do it:
• if you work alone. Use wire cutters to separate one of the ends of the coil and place it under something fairly heavy. The main thing is to fix one end of the rod. Then move back, gradually, slowly, unwinding the material
• if you work in pairs. The process will look approximately the same with one exception: one of the ends of the reinforcement will be held by an assistant

Protective equipment when working with fittings

At all stages of working with non-metallic fittings it is necessary to use protective equipment.

Gloves

Composite rods have a slight glass coating, contact with which may cause irritation on the skin. Therefore, before handling the composite rod, wear gloves.

Protective mask

When sawing non-metallic rods, fine dust is generated, which, if inhaled, can cause allergies or lead to illness. The mask will protect you from such troubles.

Source: http://fanera-ural.ru/blogs/articles/rabota-s-armaturoy-rezka-razmotka-bezopasnosthtml

How to cut fiberglass reinforcement

The popularity of the question of how to most correctly knit fiberglass reinforcement to strengthen the foundation and other concrete structures is due to the fact that this material is increasingly beginning to be used in both capital and private construction. Many of those who are going to use this innovative material are also interested in the question of how effective its use is for reinforcing the walls of buildings built from block building elements.

The reinforcing frame of a slab foundation is one of the areas of use of fiberglass reinforcement

How to cut fiberglass reinforcement? — Machine tools, welding, metalworking

Fiberglass reinforcement is cut into pieces of the required length much easier than traditional metal. In this case, composite reinforcement can be used without residue - this is one of its advantages. To speed up the work process, before cutting the reinforcement, you should first calculate the number of rods that need to be prepared.

To cut fiberglass reinforcement, you can use a grinder, a hacksaw, a multi-tool, or wire cutters (only if the rod is very thin). If cutting fiberglass reinforcement is carried out with a grinder, then in 5 seconds you can cut several fiberglass rods with a diameter of 12 mm. This is much faster than the same manipulation with metal reinforcement.

You can also cut composite reinforcement with a metal saw. This method is suitable if you do not need to make a large number of cuts. Otherwise, your hand may get very tired.

Another option is cutting plastic reinforcement with a multi-tool. This method is very fast, but also quite expensive: the corresponding tool and attachments for it are not cheap.

Many experts consider a bolt cutter to be the best option for cutting reinforcement. The only disadvantage of this tool is its limited scope of application. Buying a bolt cutter just to cut a small amount of rebar is not practical.

Whatever method of cutting fiberglass reinforcement you choose, remember the protective measures.

Please note that the rods are covered with a thin layer of glass coating, which, if it comes into contact with the skin, can cause itching or allergic reactions. This can easily be avoided by wearing gloves when performing all work with composite reinforcement.

In addition, when cutting rods, it is better to protect your face with a respirator - this way dust and small particles of the composite will not get into the respiratory tract.

If you decide to buy composite reinforcement, it means that you keep up with the times and care not only about savings, but also about the strength of the future structure.

Then you need to take a responsible approach to choosing a manufacturer of fiberglass reinforcement, who must have significant experience in this area and have positive consumer reviews.

In Nizhny Novgorod, Polimerstroy-NN LLC meets these requirements, offering ASK at an affordable price.

Successfully tested in the USSR back in the 1960-1970s, composite reinforcement has found its application in Germany and Japan, Canada and the USA.

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Working safely with fiberglass reinforcement: how to cut, tie, unwind and protect

Fiberglass reinforcement is a worthy alternative to metal rods. It is easy to use, reliable and durable. When starting to work with the material, it is useful for any craftsman to learn how to properly cut, tie and unwind reinforcement.

Cutting fiberglass reinforcement

When carrying out work using composite reinforcement, you will be faced with the question of what is more convenient, faster and easier to cut it. When you make a reinforcement cage for a foundation, or knit a mesh to fill a screed, you will need to cut parts for your product.

Cutting composite reinforcement with an angle grinder (“grinder”)

Like everything in the world, this method has its pros and cons.

Advantages of cutting composite reinforcement with a grinder

- cutting speed of the bar - you will make it quickly enough (the fastest of the proposed methods); - the ability to cut several bars at once; - low labor costs; - it is possible to use any disk (for metal, for stone, diamond, grinding). - when cutting reinforcement Angle grinder cutting is performed by a disk rotating at high speed.

Therefore, when cutting, a stream of fiberglass dust flies from under the disk, which then hangs in the air for a long time. The cooling system of a power tool (blowing) only increases this moment. Therefore, cutting with a grinder must be done using protective equipment, such as goggles, gloves, and a respirator.

It is better to carry out work outdoors; - working with an angle grinder, like any other type of power tool, is possible only if there is a working electrical outlet in the area where the work is being carried out.

- you can work without electricity; - fast cutting without dust, you don’t even need to take the reinforcement in your hands, you can cut directly on the ground or workbench; - the ability to quickly carry the tool when working on large areas (there is no limitation in the form of an electrical wire); - small the number of rods for simultaneous cutting (2-3 maximum); - fairly large labor costs during work; - a bolt cutter is not a very common tool on a farm with a narrow sector of application, and buying it only for these works is inappropriate.

- the tool is cheap, and is available in almost every household. - slow cutting; - high labor costs; - it is advisable to use it for small volumes of work.

We consider the optimal combination to be the presence and use of an angle grinder and a bolt cutter. Use a grinder to cut the bulk of the volume, and use a bolt cutter to trim the tails. (Of course, if there is electricity at the site).

Source: http://komposit-nn.ru/32-rezka-stekloplastikovoy-armatury.html

How to cut rebar

Many owners of private country buildings often need to dismantle old reinforced concrete structures, which can be destroyed with a regular sledgehammer. As for the dismantling of the reinforcing frame included in their composition, the situation here is somewhat more complicated.

Basic cutting options

Working with a hacksaw on metal

When preparing material on how to cut reinforcement, it was necessary to analyze many recommendations published on the pages of Internet forums on this topic. The results of the study were ultimately reduced to the following main cutting options:  

• working with a regular hand hacksaw;
• cutting using hand-held metal shears (with hydraulics), so-called “bolt cutters”, which can be used for reinforcement diameters of no more than 6-8 mm;
• using a cutting torch;
• cutting reinforcement using a grinder (angle grinder) with discs for concrete.

Hand saw

Some forum visitors even suggest using powerful hydraulic shears, which are equipped with rescue services.

Possible options

Portable electro-hydraulic shears

Working with hydraulic shears

It is easy to notice that all the methods of cutting reinforcement proposed above can be implemented only if certain conditions are met. To cut with a hacksaw, for example, you will need to install special blades (best of all, Swedish-made, marked “HSS”).  

To cut rods using a gas cutter, you will need appropriate gas equipment and a special permit for hazardous work. You will also encounter certain difficulties when purchasing hydraulic shears, the cost of which may be “unaffordable” for most readers.

That is why the most acceptable option for cutting reinforcing bars is traditionally considered to be the use of a rented construction grinder (the so-called “grinder”). But it should be remembered that a regular abrasive disc is not suitable for cutting reinforcement; in this case, you will need a special diamond-coated disc (such as the “Turbo” from the Stern company, for example).

It is not at all necessary to cut the reinforcing bar completely. If you are working with rods with a diameter of up to 40 mm, then it is enough to make a very small notch (about a third of their thickness). After such preparation, the rod simply breaks off at the cut site. To facilitate this operation, you can use any piece of metal pipe that will serve as a lever.

Advice from experienced craftsmen

Goggles and mask for working with an angle grinder

The final part of this article offers you some useful tips on how to cut reinforced concrete.

Respirator for respiratory protection

Experienced professionals recommend adhering to the following rules:

1. Gloves for working with an angle grinder One of the options for cutting reinforcement can be to rent a special machine for cutting industrial reinforcement. For those who, due to the nature of their work, are forced to constantly engage in such operations, it is best to purchase a machine for permanent use.
2. Diamond blades can also be used when dismantling reinforced concrete structures; At the same time, concrete can be cut both with water cooling and “dry”.
3. When working with cutting mechanisms, you need to make sure in advance that you have protective equipment (special gloves, a respirator, goggles or a mask). The use of a regular gas mask is also permitted.
4. We should not forget about observing special safety measures when working with electric tools.

This is how the reinforcement is cut using a special machine:

Source: https://kakpravilnosdelat.ru/kak-rezat-armaturu/