Steel Fiber for Concrete: Features, GOST

Steel fiber is intended to improve the quality characteristics of concrete after it will gain its design strength. It is noteworthy that it is very easy to use fiber, and the technology differs in that it can be used even by people who do not have much experience in construction.

This material performs a power role, and also ensures the reliability of the plate. The metal fiber forms a single structure with the solution during the mixing process, which can be done manually or mechanically. There is also steel-fiber-concrete, which is a kind of reinforced concrete, where the functions of the reinforcement are made by steel fibers. They are distributed throughout the volume, and the use of such concrete allows you to remove a certain part of the reinforcement from the structure , and sometimes completely eliminates the presence of a traditional core reinforcement.

The efficiency of using steel-fiber-reinforced concrete in structures is achieved by reducing labor costs for reinforcement work, as well as reducing the consumption of mortar and steel. Technological operations can be combined, and as a result, concrete mass is obtained reinforced, which leads to a reduction in labor intensity by 27% and savings in building materials per 1 m ^{3 of the} finished product.

Scope of the material

Steel fiber can be used:

• In industrial floors;
• Suspended panels;
• Stilts;
• Basement walls;
• Seamless floors.

Among other things, this material is used in the arrangement of foundations, prefabricated structures, street and support panels.

The main advantages of steel fiber

If you replace the reinforcing mesh with a fiber, the thickness of the screed will be significantly reduced, while its bearing capacity will be preserved. Thus, steel-fiber-concrete structures have a high resistance to dynamic and static loads. The design acquires the quality of crack resistance, durability, increases the vibration endurance, and also the strength.

If we compare steel fiber with traditional reinforcement, it can be noted that the time spent on fitting the reinforcement is reduced. This is due to the fact that the steel fiber is added to the mixer or under the conditions of the plant, and the mixing time can last from 5 to 15 minutes. Vibration resistance is due to the fact that the loads propagate evenly and do not contribute to the destruction of concrete. But if you lay the reinforcing bars in the process of pouring the foundation, they will not prevent the formation of small cracks. Stalefibrobeton has an increased resistance to corrosion. If such a negative effect will be exposed to the armature, then its volume will increase significantly within the structure, which will cause the destruction of the protective layer.

Key Features

If the steel fiber is added to the concrete in the process of creating different structures, the latter will have higher qualities of flexural and tensile strength, among other things, the ultimate compressibility and high impact strength will be achieved. With the help of these elements it is possible to reduce shrinkage, deformation and creep. Products are obtained thermo-, frost- and fire-resistant, and also have high abilities to resist abrasion.

Specifications

Steel fiber for concrete, the photo of which is presented in the article, is a piece of wire, the length of which can vary from 0.5 to 1.2 mm. The length of the elements varies from 25 to 60 mm. If you take a closer look at the fiber, then note that its ends have a special configuration, it contributes to reliable adhesion to the solution.

Elements are made of low-carbon wire, which belongs to one of three strength classes. The first is characterized by an index of 1150 MPa, while the second and third have a strength of 1335 and 1550 MPa, respectively. The use of steel fiber in some cases has undeniable advantages before the use of reinforcement. Steel fiber for concrete, whose consumption per m3 is about 25-50 kg, forms a three-dimensional structure that is capable of withstanding the tensile force and excludes the opening of microcracks. The latter can be formed under the influence of load forces and moisture. In the end, steel-fiber-concrete can be operated without the need for repair.

Economic advantages of using fiber

Steel fiber for concrete, the consumption of which was mentioned above, eliminates the delays caused by the installation of standard fixtures. Thus, it is not necessary to place a grid on the floor if large concrete slabs are manufactured. With the addition of these steel elements, fewer personnel can be employed, and concrete and structures from it will have higher qualities, which are expressed in that the tensile and bending strength increases by a factor of 2, and the ultimate stretch strain improves by a factor of 20. The fibers obtained with the use of fiber can be used even in seismologically dangerous regions.

State standards

Steel fiber for concrete, the GOST of which looks like 3282-74, is an anchor material that is made of high-quality wire. The most important parameter that determines the manufacturing rules is the time resistance, which starts at 900 N / mm ² . This material is used to make liquid as well as seamless floors, reinforce foundations and restore road surfaces. This fiber is used for industrial equipment, fortifications, bridge structures, runways and hydraulic structures.

On sale it is possible to meet and a steel fiber from a high-carbon wire which in the course of manufacturing cover with a brass mix. In this case, the GOST looks like 9389-75, and the temporary resistance of the material starts at 1200 N / mm ² .

Characteristics of Dramix fiber

If you are interested in steel fiber for concrete Dramix, then you should learn more about its features. It is made of low-carbon steel wire, which provides volume reinforcement. This fiber is profiled, so it adheres well to the concrete matrix. Use this material can be used for flooring in the conditions of enterprises, the manufacture of tube tunnels, the production of concrete spraying and in any cases where there is a need to improve the quality characteristics of concrete.