Bonded PC strand with HDPE coating

Basic Info

Brand: Chunpeng

Standard: Aisi, Astm, Bs, Jis

Place Of Origin: China

Application: Construction

Whether Alloy: Non-Alloy

Additional Info

Packaging: The roll is wrapped in three layers of waterproof packaging, the roll eyes are facing up and two fumigated sleepers are tied to the bottom with steel belts.

Productivity: 1000 ton

Transportation: Ocean

Place of Origin: China

Supply Ability: 1000 Per Month

Certificate: ISO9001/ISO14001/OHSAS18001

HS Code: 7312100000

Port: Tianjin Xingang

Product Description

Brief introduction of bonded Prestressed Steel strands

I. Definition and core structure

Basic concept: The steel strands are bonded to concrete as a whole through grouting. After tensioning, the channels are filled with cement slurry to form a coordinated force system.

Structural composition: It is composed of 7 high-strength steel wires twisted together (commonly used diameter 15.2mm), with a smooth or scored surface, and relies on the grouting layer to achieve bonding with concrete.

II. Key characteristics

Bonded force: Stress is transmitted to the concrete through the grouting layer, and the whole section works together with good crack resistance.

Low relaxation advantage: Stress relaxation rate after heat treatment is ≤2.5% (small deformation under long-term load).

Anti-corrosion dependence: The grouting layer isolates corrosion, but the density must be ensured (such as vacuum-assisted grouting).

III. Application scenarios

Bridge engineering: prefabricated T-beams, continuous box beams, etc., to improve bending stiffness.

Building structure: large-span floor slabs, shear walls of high-rise buildings, and reduce component size.

Water conservancy projects: dams, aqueducts, crack control and anti-seepage.

4. Comparison with unbonded

Type Bonding method Construction characteristics Cost

Bonded steel strand Cement slurry bonding Need duct grouting Lower

Unbonded steel strand HDPE sheath isolation No grouting required Higher

5. Construction points

Reserve duct (corrugated pipe) → tension steel strand → grouting (cement slurry strength ≥ M30) → density detection.

In short, bonded prestressed steel strands achieve structural synergy through "grouting bonding", which is suitable for projects with high requirements for long-term stability and crack resistance. It is one of the most commonly used prestressing forms in civil engineering.

Our Core Products are pc steel strand (Ultra High Tensile Strength PC Strand, Normal Tensile Strength PC Strand), Unbonded PC Strand, Galvanized PC Steel Strand, Weather-Resistant & Anti-Corrosion PC Strand, and PC Steel Wire.