Steel fiber is intended to improve the quality characteristics of concrete after it has gained its design strength. It is noteworthy that the use of fiber is very simple, and the technology is different in that it can be used even by people who do not have much experience in the field of 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 mixing, which can be done manually or mechanically. There is also steel fiber concrete, which is a type of reinforced concrete, where steel fibers perform the functions of reinforcement. 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 it can completely exclude the presence of traditional bar reinforcement.
The efficiency of using steel fiber concrete in structures is achieved by reducing labor costs for reinforcing work, as well as reducing the consumption of mortar and steel. Technological operations can be combined, and as a result, the concrete massit turns out reinforced, which leads to a reduction in labor intensity by 27% and savings in building materials per 1 m3 of the finished product.
Area of use of the material
Steel fiber can be applied:
- in industrial floors;
- hanging panels;
- stilt;
- basement walls;
- seamless floors.
Among other things, this material is used in the arrangement of foundations, prefabricated structures, street and support panels.
Main advantages of steel fiber
If you replace the reinforcing mesh with fiber, the thickness of the screed will decrease significantly, while its bearing capacity will remain. Thus, steel-fiber-reinforced concrete structures have high resistance to dynamic and static loads. The design acquires the qualities of crack resistance, wear resistance, vibration endurance increases, as well as strength.
If we compare steel fiber with traditional reinforcement, it can be noted that the time spent on the installation of reinforcement is reduced. This is due to the fact that steel fibers are added to the mixer or in the factory, and the mixing time can last from 5 to 15 minutes. Vibration resistance is due to the fact that the loads are distributed evenly and do not contribute to the destruction of concrete. But if you lay reinforcing bars in the process of pouring the foundation, then they will not prevent the formation of small cracks. Steel fiber reinforced concrete has increased resistance to corrosion. If the reinforcement is exposed to such a negative impact, then its volume will increase significantly inside the structure, which will cause the destruction of the protective layer.
Main Features
If steel fibers are added to concrete during the creation of various structures, then the latter will have improved qualities of bending and tensile strength, among other things, 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 heat-, frost- and fire-resistant, and also have high ability 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, you will notice that its ends have a special configuration, which 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 indicator 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 over the use of reinforcement. steel fiber for concrete,the consumption per m3 of which is approximately 25-50 kg, forms a three-dimensional structure that is able to withstand tensile force and excludes the opening of microcracks. The latter can be formed under the influence of load forces and moisture. Ultimately, steel fiber reinforced concrete can be used without the need for repairs.
Economic benefits of fiber
Steel fiber for concrete, mentioned above, eliminates the delays caused by the installation of standard fasteners. Thus, it is not necessary to place the grid on the floor if large-area concrete slabs are being manufactured. By adding these steel elements, fewer personnel can be involved, and concrete and structures made of it will have higher qualities, which are expressed in the fact that the tensile and bending strength is increased by 2 times, and the ultimate tensile strain is improved by 20 times. The structures obtained using fiber can be used even in seismologically hazardous regions.
State Standards
Steel fiber for concrete, GOST 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 tensile strength, which starts from 900 N/mm2. This material is used for the manufacture of bulk, as well as seamlessfloors, reinforcing bases and restoring road surfaces. This fiber anchor is used for industrial equipment, fortifications, bridge structures, runways and hydraulic structures.
On sale you can also find steel fiber made of high-carbon wire, which is coated with a brass mixture during the manufacturing process. At the same time, GOST looks like 9389-75, and the tensile strength of the material starts at 1200 N/mm2.
Dramix Fiber Characteristics
If you are interested in Dramix steel fiber for concrete, then you should familiarize yourself with its features in more detail. It is made of low carbon steel wire, which provides bulk reinforcement. This fiber is profiled, so it adheres well to the concrete matrix. This material can be used for flooring in enterprises, the manufacture of tunnel tubing, the production of sprayed concrete and in any case where there is a need to improve the quality characteristics of concrete.
