12.7mm Prestressed Steel Strand for Construction
Product Overview:
Prestressed steel strand is a stranded steel cable consisting of 2, 3, 7, or 19 high-strength steel wires, and has been treated with stress relief (stabilization treatment), suitable for prestressed concrete and similar applications.
12.7mm Prestressed Steel Strand for Construction Details
The steel strand is a steel product composed of multiple steel wires twisted together. The surface of carbon steel can be added with galvanized layer, zinc-aluminum alloy layer, aluminum-clad layer, copper-plated layer, epoxy resin, etc. as required. The manufacturing process is divided into monofilament manufacturing and stranded wire manufacturing. Wire drawing technology is used when making monofilament. According to different products, the material can be a high carbon steel wire rod, stainless steel wire rod, or medium and low carbon steel wire rod. Zinc shall be electroplated or hot-dipped on the monofilament. In the strand manufacturing process, a stranding machine is used to strand multiple steel wires into a product. The prestressed steel strand also needs to be stabilized continuously after forming. The product is generally collected on an I-shaped wheel or completed in a non-shaft roll.
Technical Parameter
| Dia(mm) | Tensile Strength(Rm/MPa) | Max strength for hole wire(Fm/kN) | StipulatedNominal Non proportional extension rate(Fp0.2/kN) | Cross section size(mm2) | Approximate weight(g/m) | Tolerance(mm) |
| 12.7 | ≥1860 | ≥185.1 | ≥166 | 98.7 | 775 | +0.4~-0.2 |
| 15.2 | ≥1860 | ≥262.5 | ≥235 | 150 | 1178 | +0.4~-0.2 |
| 12.8 | ≥1860 | ≥358 | ≥318 | 191 | 1500 | +0.4~-0.2 |
Prestressed Steel Strand Installation
The position of the channel of the prestressed steel bundle and whether the steel strand is twisted are the key points of quality control. The position of the tunnel is not accurate, which changes the stress state of the structure. If the elevation change section of the curved tunnel is not smooth, it will also increase the friction loss of the prestressed tunnel. Therefore, whether the tunnel position is accurate or not is directly related to whether the prestressing degree of construction can be compared with the prestressed design. The consistent stress degree has a profound impact on the safety of the structure and whether cracks will occur during the engineering use stage. If multiple steel strands are twisted together, the stress on each steel strand will be uneven during tension, which will increase the friction between the steel strands and increase the loss of prestress.
Application of steel strand
Galvanized steel strand is usually used for messenger wire, stay wire, etc. It can also be used as the ground wire for overhead transmission, the blocking cable on both sides of the highway or the structural cable in the building structure. The commonly used prestressed steel strand in the prestressed steel strand is the low relaxation prestressed steel strand without coating, and there are also galvanized prestressed steel strands, which are commonly used in bridges, buildings, water conservancy, energy and geotechnical engineering. The unbonded prestressed steel strand is commonly used in floor and foundation engineering.
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About Zhongtuo
Shaanxi Zhongtuo Mining Equipment Co., Ltd. was located in the ancient city of Xi'an in 2005. The company focuses on the production and development of intelligent equipment, focusing on mining equipment, splitting equipment, prestressing equipment, drilling, and rock drilling equipment, shotcrete grouting equipment, and road equipment! The products are used in bridge construction, tunnel subway construction, mining, and hydropower new energy projects.
Zhongtuo business scope covers drilling rigs, bridge tension jacks, diamond saw machines, mud pump machines, mortar spraying machines, dry-mixed shotcrete machines, high-pressure grouting pumps, rebar processing machines, rock splitters, pavement machinery, rescue tools, and so on.
Business Purpose
Shaanxi Zhongtuo Mining Equipment Co., Ltd. was founded with "credibility first, service and thoughtful" as the purpose of the enterprise, the spirit of "honesty, openness, hard work, innovation" spirit of enterprise, adhering to the scientific development, the quality of survival, to serve the credibility of the guiding principles.
Prospect Future
Become a world-class mine equipment development manufacturer and service provider; "perfect quality, boutique concept, in-depth development, customer first" credo to build the brand and the future; Honesty, seeking economic and social unity, pioneering the development of the times.
