21.8mm Unbonded PC Strand – High-Performance Prestressing Solution for Modern Infrastructure
Engineered for superior tensile strength and long-term durability, the 21.8mm unbonded PC Strand is a premium prestressed concrete steel product designed to meet the rigorous demands of advanced construction projects worldwide. Unlike traditional bonded systems, this high-strength steel strand offers flexibility in installation, eliminates the need for grouting, and ensures consistent performance across diverse environmental conditions. Ideal for bridges, high-rise buildings, industrial facilities, and precast structures, it delivers unmatched structural integrity with minimal maintenance requirements.
This specialized 21.8mm PC strand without bonding features a unique design that allows individual wires to move independently while maintaining overall strand cohesion. This characteristic enhances resistance to thermal expansion and contraction, making it particularly suitable for regions with extreme temperature fluctuations. The absence of bond also streamlines the installation process—reducing labor costs, minimizing project timelines, and improving site efficiency. Manufactured under strict international quality standards, each strand undergoes precision cold drawing, stress-relief treatment, and protective coating to ensure corrosion resistance and extended service life.
Key benefits include: exceptional load-bearing capacity, enhanced fatigue resistance, simplified post-tensioning procedures, and reduced risk of premature degradation due to moisture or chemical exposure. Whether used in seismic zones, coastal environments, or urban infrastructure developments, this unbonded prestressing solution provides reliable support for critical structural elements such as beams, slabs, columns, and bridge decks.
Manufactured by Chunpeng Group—a globally recognized leader in prestressed concrete materials with over three decades of experience—the 21.8mm unbonded PC strand is part of a comprehensive portfolio that includes galvanized strands, weather-resistant variants, and anti-corrosion solutions. Our commitment to innovation, quality control, and sustainable engineering makes us a trusted partner for civil engineers, contractors, and architects seeking durable, efficient, and future-ready building materials.
Common applications span from highway overpasses and parking structures to commercial skyscrapers and large-scale water reservoirs. Its adaptability to both new builds and retrofitting projects positions it as an ideal choice for modernizing aging infrastructure while meeting evolving safety codes and sustainability benchmarks.
Users consistently praise its ease of handling, consistent performance under heavy loads, and long-term reliability compared to alternative prestressing methods. Many report significant reductions in installation time and fewer complications during tensioning operations—especially when working in tight spaces or complex geometries.
Frequently asked questions often center around compatibility with standard anchorage systems, expected lifespan under various climates, and whether additional protective measures are required. In most cases, the 21.8mm unbonded PC strand performs reliably without supplementary treatments when installed according to manufacturer guidelines. It’s compatible with most post-tensioning anchorages and requires only periodic inspection for optimal longevity.
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