Do you know about PC Spiral Rib Steel Wire?

The core of prestressing technology is to apply tension in advance. The PC spiral rib steel wire is stretched to 70%-80% of the ultimate strength through mechanical tensioning, and its retraction force is used to form permanent compressive stress on the concrete structure, thereby offsetting the tensile stress caused by external loads. PC steel wire is a kind of steel wire made of carbon steel wire material, and used in prestressed concrete structures. There are three types, they are Plain PC wire, spiral rib PC wire, and indented PC wire. In this article, I will introduce our PC spiral rib steel wire to you:

The PC spiral rib steel wire is made of high-strength steel wire wound into a spiral shape. The surface is spirally deformed and drawn to form a three-dimensional PC spiral rib structure. The rib height is 0.2-1.0mm, with continuous spiral protrusions, a 60°-80° spiral angle design, and a double helix staggered layout, high-strength, low-relaxation, supply in coil, large-length, low-consumption, PC spiral rib steel wire has strong bond with concrete. 

1. Production Process

- Raw Material Inspection: inspect raw materials such as high carbon steel wire rods to ensure that the quality meets the requirements.

- Surface Treatment: usually includes pickling, phosphating, etc. to remove surface impurities and improve the surface performance of steel wire.

- Semi-finished Product Drawing: the wire rod is drawn to the required semi-finished product size through the cold drawing process.

- Spiral Rib Drawing: using a special rotating body and spiral die, the semi-finished steel wire is drawn to form spiral ribs.

- Stabilization Treatment: the steel wire is stabilized at 380℃-400℃ to eliminate stress, improve dimensional stability and relaxation performance.

- Wire Collection, Inspection and Acceptance: the treated steel wire is collected, and various performance inspections and acceptances are carried out in accordance with relevant standards.

2. Performance Characteristics

- High Strength: Nominal tensile strength ≥ 1570MPa, which can provide strong prestress for concrete structures.

- Good Bonding Performance: The design of spiral ribs increases the bonding strength between steel wire and concrete, making the two work better together.

- Low Relaxation Performance: The initial force is equivalent to 70% of the actual peak force, and the 1000h stress relaxation rate r/% ≤ 2.5; the initial force is equivalent to 80% of the actual peak force, and the 1000h stress relaxation rate r/% ≤ 4.5.

- Good Straightness: Take a steel wire with a chord length of 1m and place it on a plane. The chord and the inner natural sagittal height are not more than 20mm for all steel wires.

3. Application Fields

- Bridge Engineering: used for bridge beams, piers and other structures to improve the bearing capacity and crack resistance of bridges.

- Construction Engineering: can be applied to the foundation of high-rise buildings, roof trusses of large-span buildings, etc., to enhance the stability and durability of the structure.

- Rail Transit: such as railway sleepers, subway tunnels, etc., to help ensure the smoothness and stability of the track and extend its service life.

- Water Conservancy and Hydropower Engineering: used for hydraulic structures such as dams and pools to improve the impermeability and crack resistance of the structure.

4. Conclusion

Our PC steel wire typically comes in various diameters to suit different applications. The diameter ranges commonly available in the market include 4mm, 4.8mm, 5mm, 7mm, 9mm, 11mm, and 12.7mm. The selection of the wire diameter depends on factors such as the magnitude of the expected loads, the size of the structural element, and the engineering design criteria.

The intensity of PC steel wire can vary based on project requirements, but it is generally high. Commonly available intensities for prestressed concrete steel wire include 1570 MPa (megapascals), 1670 MPa, 1770 MPa, and 1860 MPa. Higher intensity wires offer greater load-bearing capacity and allow for the construction of more robust and durable structures.

In addition, we can customize according to the exact appearance and size provided by the customer. As long as you have needs, you can choose any specifications and sizes. If you are interested in understanding or inquiring, please feel free to contact us by email or phone! View our website https://www.yxmaterial.com to find the products you need, request a quote, or contact us for more assistance or additional information.