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. Metal fiber forms a single structure with a solution in the mixing process, which can be done manually or mechanically. There is also steel fiber reinforced 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 effectiveness of using steel fiber reinforced concrete in structures is achieved by reducing labor costs for reinforcing work, as well as reducing the consumption of mortar and steel. It is possible to combine technological operations, and as a result, the concrete mass is reinforced, which leads to a 27% reduction in labor input and a saving in building materials per 1 m 3 of the finished product.
Material Use Area
Steel fiber can be used:
- in industrial floors;
- hanging panels;
- stilts;
- basement walls;
- seamless floors.
Among other things, this material is used in the arrangement of foundations, prefabricated structures, street and supporting panels.
The main advantages of steel fiber
If you replace the reinforcing mesh with fiber, then the thickness of the screed will be significantly reduced, while its bearing capacity will be preserved. Thus, steel-fiber concrete structures have high resistance to dynamic and static loads. The design acquires the qualities of crack resistance, wear resistance, increases vibration endurance, as well as strength.
If we compare steel fibers with traditional reinforcement, then it can be noted that the time spent on installing reinforcement is reduced. This is due to the fact that steel fiber is added to the mixer or in a 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 reinforcing bars are laid in the process of pouring the foundation, they will not prevent the formation of small cracks. Steel fiber concrete has increased resistance to corrosion. If the reinforcement is exposed to such a negative effect, then its volume will significantly increase inside the structure, which will cause the destruction of the protective layer.
Key Features
If steel fiber is added to concrete in the process of creating different structures, the latter will have improved qualities of bending and tensile strength, among other things, ultimate compressibility and high impact strength will be achieved. Using these elements it is possible to reduce shrinkage, deformation and creep. Products are thermo-, frost- and fire-resistant, and also have high abrasion resistance.
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 look more closely 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 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 forces and eliminates the opening of microcracks. The latter can be formed under the influence of stress and moisture. Ultimately, steel fiber concrete can be operated without the need for repairs.
Economic Benefits of Using Fiber
Steel fiber for concrete, the flow rate of which was 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 manufactured. When these steel elements are added, a smaller number of personnel can be involved, and concrete and its structures will have higher qualities, which are expressed in that tensile and bending strength is increased by 2 times, and ultimate tensile strain is improved by 20 times. 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, which is made of high quality wire. The most important parameter that defines the manufacturing rules is the temporary resistance, which starts at 900 N / mm 2 . This material is used for the manufacture of bulk as well as seamless floors, base reinforcement and road restoration. This anchor fiber is used for industrial equipment, fortifications, bridge structures, runways and hydraulic structures.
On sale you can also find steel fiber from high-carbon wire, which is coated with a brass mixture during the manufacturing process. In this case, GOST looks like 9389-75, and the temporary resistance of the material starts at 1200 N / mm 2 .
Dramix Fiber Features
If you are interested in steel fiber for Dramix 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. It is possible to use this material for flooring in enterprises, for the manufacture of tunnel tubes, for the production of concrete spray, and in any cases when there is a need to improve the quality characteristics of concrete.