Owners of the patent RU 2245860:

The invention relates to the building materials industry. The composition of fibrobeton contains cement binder, filler, reinforcing the fibrous component and water. The reinforcing non-metallic fibrous component is previously processed in the low-temperature plasma of the alternating current discharge at a pressure of 50-250 Pa, the current of 1.0-2.2 mA / cm 2 for 20-60 seconds. Technical result: increase in bending strength, with compression and resistance indicators, shock 1 Table.

The invention relates to the building materials industry and can be used in the manufacture of fibrobetone compositions reinforced by non-metallic fiber.

BACKGROUND

The composition of Fibrobeton [Rabinovich F.N. Disperse-reinforced concrete. - M.: Stroyzdat, 1989, p. 130-131], which contains water, filler, as a binder - cement, as a reinforcing material - fiberglass.

The disadvantages of such material are:

Low bending strength;

Low compressive strength;

Low resistance to impact.

The closest in the composition of the invention is the composition of fibrobeton [technology and durability of dispersed-reinforced concrete. Collection of scientific papers. - L., 1984, p. 67-68], which contains water, as a binder - cement, as a material of the filler - sand with MKP \u003d 2 and maximum grain size of no more than 5 mm, as a reinforcing material - fiberglass, Inserted into the construction dough in the amount of 1-2% by weight of the material, with the ratio of cement and filler (C: P) 1: 1 and the ratio of water and cement (V / C) 0.4.

However, such material has drawbacks:

Low bending strength - 9 MPa;

Low compressive strength - 60 MPa;

Low speeds of resistance to impact - 2.6 kgm / cm 2.

Essence of the invention

The objective of the invention consisted of a search composition of fibrobetone containing a cement binder, a filler, reinforcing a non-metallic fibrous component and water, which would increase the strength of the material for bending, the strength of the material to compress and increase the resistance of the impact.

The task is achieved by the fact that the composition of fibrobetone containing a cement binder, the filler, reinforcing a non-metallic fibrous component and water, contains a reinforcing non-metallic fibrous component, previously treated in a low-temperature plasma of the alternating current discharge at a pressure of 50-250 Pa, current 1.0- 2.2 mA / cm 2 for 20-60 seconds.

The invention allows to obtain the following advantages:

Increase the strength of the material when bending by a value of 25 to 60%;

Increase the strength of the material when compressed by a value from 40 to 90%;

Material resistance to impact by a value from 10 to 30%.

Information confirming the ability to reproduce the invention

To prepare the proposed composition of fibrobeton use:

As a binder - cement, such as M500;

As a filler material - traditionally used for the manufacture of concrete mixtures, for example: clay sand, quartz sand, etc.;

Various fibers of organic and inorganic origin can be used as a non-metallic fibrous reinforcing material, such as fiberglass, polyamide, cotton (production waste), flax (production waste), polyethylene terephthalate, asbestos. Prerequisite is the pretreatment of these fibers in the plasma of the alternating current discharge at a pressure of 50-250 Pa, the strength of 1.0-2.2 mA / cm 2 for 20-60 seconds. The reinforcing fibrous component is used in an amount of 1-4% by weight.

The composition is prepared in a traditional way. Cement dough prepare from taken in the required ratio of cement and water (in / c \u003d 0.34-0.4), which are thoroughly stirred to obtain a homogeneous mass. In the resulting mass make required amount Filler (C: n \u003d 1: 1-1: 0.7) and again stirred to a homogeneous mass. The resulting amount of the fibrous reinforcing component has been introduced into the resulting mass, which has passed the preliminary processing in the plasma of the glowing discharge, and stirred to obtain a homogeneous mass. From the obtained composition of the fibrobeton form the standard form 40 × 40 × 160 mm sample. After hardening and exposure of the samples, samples test for 28 days. The strength of the compression material is determined according to GOST 310-4-76, bending strength - according to the GOST 10180-78 method. Material resistance to the strike was also determined for the prototype, and for the invention is equally, namely, according to the well-known method on the vertical copre [technology and durability of dispersed-reinforced concrete, a collection of scientific papers, L., 1984, p. 94].

Qualitative indicators of the composition using non-metallic fibers of various chemical nature and physical structure treated in a low-temperature plasma of the glow discharge under various parameters are presented in Table. one.

The composition of fibrobetone containing a cement-binding, filler, reinforcing a non-metallic fibrous component and water, characterized in that it contains a reinforcing non-metallic fibrous component, previously treated in a low-temperature plasma of the alternating current discharge at a pressure of 50-250 Pa, current 1.0-2 2 mA / cm 2 for 20-60 s.

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Thanks to the reliability and durability, concrete is considered universal and widely used building material. His production technology is constantly being improved, improving quality characteristics.

Fibrobeton is one of the types of concrete, characterized by a special strength due to the reinforcement of the material fibrovolok.

As a filler for such fibers use:

Steel wire;

Polypropylene;

Nylon threads

Basalt;

Viscose;

A few words about production technology

Get such a kind of material through thorough mixing concrete solution and reinforcing fiber. At the same time the most an important stage technological process It is a uniform multidirectional distribution of the fiber filler together with strict observance of proportions, thanks to which the parameters of strength and elasticity becomes more perfect.

Scope of application

Fibrobeton is used in the manufacture:

Wall panels;

Bulk floors;

Borders;

Finishing facade plates;

Elements of architectural decoration;

Bridge coatings;

Runway aerodrome strips.

Advantages of fibrobeton

To the obvious advantages of such a variety of concrete include:

Wear resistance making material resistant to penetration of moisture, temperature drops, mechanical damage, long-term loads, cracks and destruction;

Heavy duty achieved due to the excellent interaction of fibers with solutions and mixtures and allowing to reduce the thickness and volume of the entire structure;

Environmentally friendly and fire safety, allowing the use of fibrobeton when erecting buildings with a permanent residence of a person;

Efficiency, which allows in comparison with the reinforcement frame or a grid to reduce not only the cost of the estimate, but also time on the process of material production;

Practicality that gives you the opportunity to reduce the consumption of concrete by adding the reinforcing filler;

Long service life.

Disadvantages of material

The price of the material under consideration is the only disadvantage.

In comparison with the analogue of traditional production, the cost of fibrobeton is higher, which directly depends on the value of the material used as a filler. However, a place occupied in the average price segment, nevertheless leaves it accessible and attractive to the buyer.

IN modern construction More and more wide application find diverse designs From the fibrobeton - composite material, in terms of which fiber reinforcement is additionally distributed. Due to this strengthen, it is possible to minimize the key disadvantages of traditional concrete - fragility and low tensile strength. This article will be described in detail about the material and its properties, as well as how to make a fibrobeton with your own hands.

General knowledge

The use of steel fibra during conducting concrete work Provides the following advantages:

• save time due to the lack of need to install traditional fastening;
• lack of risks associated with the installation on the floor of the grid or bars;
• the ability to attract a smaller number of personnel;
• improving the quality of ready-made concrete structures.

So, what fibrobeton is concrete, in which its area is evenly enhanced by dispersed fibers. These can be the remains of wire or waste from the production of nails, as well as non-metallic materials.

Because of this, it has several times large compared to standard:

• strength;
• viscosity;
• resistant to the formation of cracks;
• frost resistance;
• heat resistance;
• fireproof;
• cavitation resistance;
• waterproof.

Features of the use of steel fibra

Adding steel is possible both before the process of its preparation and during and even after. Moreover, the most qualitative concrete will be precisely in the case of mixing fibra in the already ready mix, but at the same time it is extremely important to ensure that Fiber does not take lumps.

Tip: Thanks to the use of fibra, it becomes possible to use concrete when conducting repair work In the most difficult to access damaged places where reinforcement through metal products It is impossible.

From the point of view of the technical and economic efficiency and feasibility of using metal fibra, the most rational use of the following types of structures:

• nPP reactor offices, while especially controlled by GOST to fibrobeton;
• containers used for the disposal of radioactive waste, structures where induced radioactivity does not occur;
• bridges;
• runways of airfields;
• hydraulic constructions (coastal dams and dams, gateways and river channels);

• various kinds of road surfaces - Plates of the national team and monolithic type, borders performing the separation function of the paving slabs;
• civilian buildings in places having high seismic activity, as well as foundations fill with the construction of powers;
• foundations for volume industrial equipment with mechanical or dynamic action: hydraulic presses, rolling mills, hammers;

Tip: To work with installation and dismantle of reinforced concrete, used reinforced concrete cutting diamond circles The desired density.

• railway tracks and protective slopes railwayspreventing blur to the thale and river waters ; in the process of strengthening and repairing mines and tunnels in the subway; when conducting reconstruction work in banking storage facilities and safes; To give thin-walled panels and partitions of armor and fire-resistant properties; In preparing the foundation of the monolithic type under the gas or oil drilling rig.

• when lining the walls of heating and cracking-furnaces located on plants engaged in oil processing; In the process of repairing the arch electric stoves For melting steel at metallurgical enterprises; when recovering costements and gas cleaners, air supply pipelines, and gutters, according to which liquid cast iron is drained from blast furnaces;
• during the implementation of the repair work in the rains of buckets for the spill of steel, in the collective type panels that protect the floor from the molten metal, in structures that provide water supply and its lead, in objects with defense and strategic purpose.

When using the material, it should be understood that the thermal conductivity of the fibrobeton depends on the filler.

Work with material

Laying concrete with fiber is made using special laying machines or with the help of traditional devices generating vibrations. This technology allows you to seek to prepare that positively affects it physical characteristics and allows you to get a flat surface.

Tip: In the case of working with minor volumes, you can use manual laying.

The finishing surface treatment, as a rule, is performed using a manual steel brake or a grout typewriter. Close the surface should be smoothed immediately after the concrete is flooded, so that the ends of the fibers are not performed.

The fibers manufactured by the modern industry are easy to enter into the solution and easily mixed with it. Due to work, it is possible to mainly use standard technological equipment used for conventional concrete.

Tip: If it is impossible to make the necessary channel in the concrete, you will help the diamond drilling of the holes in the concrete with the help of special crowns.

Advantages in civil engineering

Adding steel fibra to concrete is widely used when working on:

• high speed trails;
• aerodrome runway;
• structures preventing the occurrence of landslides, coastal protection structures resistant to earthquakes of buildings;
• foundations of machines.

At the expense of fiber concrete acquires additional stiffness and higher strength, thanks to which the developers have the ability to develop structures that can withstand elevated loads.

As evidenced by the existing experience in domestic and foreign construction, the material is considered incredibly universal, the scope of the application of which is steadily expanding.

Products made of reinforced steel fiber concrete have a higher economic efficiency compared to reinforced concrete, which is expressed in:

• a significant reduction in labor costs, while the price of work becomes competitive;
• reduce material needs;
• significant increase in durability;
• prolongation of frequency gaps;
• minimize the shortcomings in the rod reinforcement.

Manufacturing technology

The production of fibrobeton does not apply to complex processes. Standard manufacturer's instruction this material Includes several consecutive stages:

On this, by and large, the cooking process can be considered completed. So simple technology production does not prevent material to enjoy the whole near indisputable advantages, including economic benefits associated with the lack of any additional costs.

It is necessary to clarify that not only metal particles can be used as fiberolocon, but also the mass of other materials with the properties suitable for this purpose.

You can turn on the long list:

• glass;
• plastics;
• polyester, asbestos, carbon and even cotton fibers.

All of them will significantly improve the final characteristics of the finished concrete.

Tip: In the process of building structures that should have increased strength, it is recommended to use material solely based on metal fibers.

Output

In this article you learned that although a complex technology is not required for the manufacture of material - the fibrobeton is obtained by weight positive qualities, allowing him to compete with standard concrete. Thanks to its characteristics, it is used in wide spectrum construction work. As additives, both metal and non-metallic materials can be used.

Video in this article will help you find you additional information on this subject.

As you know, the stone works well on compression, the resistance to stretching provides armature carcass. But the steel is located only in places of the largest estimated stretch, and in cases where the strength is necessary throughout the volume, the device of reinforcement rods becomes very expensive. Solve the problem is called fibrobeton - material with fibrous reinforcement.

Structure

Fibrobeton is a special kind building materialHigh strength. Which includes:

• Cement;
• Peeled sand;
• Fibers fibers;
• Plasticizers;
• Water.

In contrast to the classic concrete solution, this does not add a large aggregate, instead the role of binding hardensors play fibers fibers. These can be materials of different origin:

• Metal fiber - steel chips. With it, concrete is obtained especially strong on the gap, stretching, prevents the formation of cracks and a significant shrinkage when hardening and drying the solution. The sizes of chips are determined according to the calculations of the structures, since the aggregator is the main component that makes over all loads and compensating them. With the need for concrete with high carrier ability The edges of the chips are sweeping, multiple anchors are formed performing the role of a rigid frame.
• Non-metallic fiber is most often part of the fibrobeton. This is a fiber of different origin (fiberglass, polypropylene, polyamide, acrylic, viscose, nylon, asbestos, carbon, basalt, carbon).

For the most responsible goals, metallic fiber is used, for non-loaded - polypropylene and fiberglass. Durable steel fiber can be replaced by more expensive basalt, but this option is rarely taken in mind high cost. Polymer and glass fibers are available at the price and optimal specifications.

Application of fibrobeton

Concrete with reinforcing fibers are widely used in construction. industrial facilities, especially responsible objects and public places:

• Road coating;
• Laying of the take-off stripes of airfields;
• Massive foundations for heavy objects;
• Durable floor in industrial workshops and warehouses;
• Sidewalks;
• Monolithic construction of houses, tunnels;
• Strengthening embankments;
• Special purpose objects: drainage mines, sewer wells, cleaning tanks;
• Bases of pools, etc.

Separate products from fibrobeton:

• Noise shields along the tracks;
• Road borders;
• Paving tile;
• Benches;
• Fences;
• Visors, etc.

Fiber reinforced concrete is used in cases where the framework of the frame is inappropriate in terms of financial, material and labor costs. For example, the road tile reinforces is much more complicated than to introduce reinforcing fiber and simply pour concrete into the form. The same principle works with supporting structures - plates or monolithic walls In the tunnels, the supports of the embankments: the load on them comes evenly throughout the area, therefore any part of the product should be equally strong, which is not easy to achieve with classical reinforcement frames.

Fibrobetones tinted by pigment serve as the basis for creating decorative panels For finishing facades, landscape decoration, fountain cladding and other designs. Products give different shape, relief and texture.

Specifications

For each type of filler, there is its own recipe for the preparation of the solution, respectively, concrete differs in all characteristics. The composition and characteristics of fibrobeton GOST are not regulated. According to SP 52-104-2006, the material must meet the requirements of GOST 26633-91.

For each type of material there will be their own indicators:

• For fiber from polypropylene density 0.9 g / cm3, the elastic module reaches 8000 MPa, lengthening to a gap to 25%;
• For basalt density of 2.6-2.7 g / cm3, the elastic module is up to 11,000 MPa, tensile strength up to 3200 MPa, lengthening to a gap to 3.6 MPa;
• For steel density of 7.8 g / cm3, the modulus of elasticity up to 210000 (!) MPa, and tensile strength of 3150 MPa.

As seen, specifications Fibrobeton differ slightly (with the exception of individual parameters, but they must be considered when choosing a fiber). We present the main parameters of fiberglass-based concrete:

All concrete on reinforced fiber differ in high frost resistance and waterproof.

Advantages and disadvantages

Fibrobeton - unique material, superior to the usual stone for a number of qualities:

• Simplified method of reinforcement by the method of kneading components;
• Consumption of concrete decreases due to the introduction of fibers from 20% of the total volume;
• Stone strength across the whole volume increases;
• Increases viscosity and disappointment of the solution into the form;
• Good adhesive qualities;
• Increase in waterproof;
• Reducing the mass of the product and structures;
• Increased service life.

For proper selection The fibers and their characteristics of the only lack of fibrobeton will remain its high cost, which is easily compensated by the durability of the stone and the lack of repair requirement.

Fibrobeton do it yourself

This high-quality fibrobeton can be manufactured only at the factory preliminary calculations. For each type of fiber used different recipes, It is withstanding the time of the kneading, which at home is not easy to achieve. To independently prepare the solution, you should create a standard mixture of cement, sand and plasticizer, add fiber to them. The proportion is determined individually: 1 m3 will be needed from 300 grams. up to 25% dry fiber from total. To reduce the material, you can use a mixture of expensive and cheap fibers.

In private housekeeping, concrete stone reinforced fibers are used for a solid foundation device. It is much easier to mount, without using a separate frame of reinforcement rods, but the main condition must be fulfilled - the material must be calculated in advance in the design bureau.

Panels from fibrobeton can be made independently and bind them the facade of the house, making shields for the fence - it is much cheaper than buying ready or reinforce ordinary concrete.

NEW B. building technologies - Fibrobeton. The name is directly related to the composition of the new material: it includes concrete and fibrovolok. Fiber reinforces concrete mix, giving it additional strength to its structure. The theme of this material is houseshief.ru - the use of fibrobeton. We will consider all aspects of this new technologywhere she can come in handy, and will answer the question whether it is possible to independently make a reinforcing fiber.

Read in the article

What is it, fibrobeton, and why he is so in demand

The main problem of objects built from concrete is the gradual destruction of monolith under the influence of external and internal factors. The search for structural strengthening methods led to the invention of reinforcement techniques concrete mix With a fibrous filler.

The material was called fibrobeton. Now it is becoming increasingly popular in private and industrial construction. So what is it, fiber for concrete? Fiberglass is what is used as a filler: metal and non-metallic threads, carbon, glass, acrylic, basalt.

Types of fibra and characteristic features of fibrobeton depending on the filler

The characteristics of the fibrobeton directly depend on the type of filler. In addition, the quality of the material affects the size of the fibers. Thus, short fibers with a length of 3-4 millimeters are used to create mixtures for the manufacture of decorative and reinforcement. Fibers 6 milieters long increase the strength of light compositions, 12 mm - strengthen and, hydraulic structures.

If required bearing structuresused steel fixed. It is distinguished by high operational characteristics And similar to products made from Class B100 concrete.

Application of fibrobeton in monolithic construction

Monolithic structures reduce local loads on, thanks to which you can build multi-storey buildings. And if the composite concrete is used, then the reliability and strength of the object is difficult to compare with something.

Monolithic structures from the fibrobetonic array are distinguished by increased seismic resistance. They calmly perceive a sharp change of temperature, resistant to moisture. Undoubted plus monolithic composite construction - The possibility of structural structures complex on the configuration.

How to make fiber for concrete with your own hands: Useful video

Fiber industrial production You can buy in building materials stores. Is it possible to make fibrobeton with your own hands at home? For the solution of this difficult task, the author of the next video material was taken:

Price per kilogram Fiber and how much it is necessary for the production of m³ fibrobeton

You can buy microfibra for concrete in a packaged form in bags. If paper bags, you can, without opening, immediately put into the concrete mixing mechanism. Paper is dissolved during the mixing process.

Fiber consumption per 1 m³ of concrete - 20-40 kilograms. The composition and fibrobeton depend on the type of filler and the required strength.

How much is Fiber: