The unbonded prestressed steel strand is formed by coating the surface of the prestressed steel strand with anti-corrosion and lubrication coating and wrapping it with high-density polyethylene sheath. The steel strand and the sheath can slide permanently.

Its advantage is that it does not need to reserve holes, thread reinforcement, grouting and other complex processes during construction, the construction procedure is simple, and the construction speed is accelerated. At the same time, the friction force is small and it is easy to bend into multi span curve type, which is especially suitable for large span single and two-way continuous multi span curve reinforced beam slab structure and roof.

Classification

Executive standard

Nominal diameter

Diameter deviation

Nominal tensile strength

Purpose

Cold drawn steel wire

Plain round steel wire

Spiral rib steel wire

Notched wire

High strength, low relaxation.

It is mainly used in sleepers, poles, bridge cables, pressure water pipes, storage tanks, water towers, etc.

A / B and technical agreement

The surface of the steel wire is smooth and the zinc layer is even; the laying (stranding) is even; the resistivity, mechanical and physical properties can fully meet the requirements specified by the customer; the performance of the steel wire is good

For overhead conductor, ground wire and communication cable, suspension, bolting and fixed objects

The steel wire surface is smooth and the zinc layer is even; the strength grade and zinc layer grade can be matched according to the customer's requirements; the steel wire has good performance

 

For overhead conductor, ground wire, communication cable and suspension reinforcement