The 28.6mm
Unbonded PC Strand: A High-Performance Solution for Modern Construction Projects This premium pre-stressed concrete tendon is engineered for structural applications that demand exceptional tensile strength, long-term durability, and adaptability to dynamic environmental conditions. Designed by Chunpeng Group—a global leader in
Prestressed Steel materials with over three decades of manufacturing excellence—the 28.6mm unbonded
PC Strand delivers reliable performance across bridges, high-rise buildings, industrial facilities, and infrastructure retrofitting projects worldwide. Its advanced composition ensures consistent quality, minimal maintenance, and optimal load distribution under extreme stress, making it ideal for both new builds and structural upgrades. Key Features Engineered from high-tensile steel wires individually coated and tightly twisted into a single unit, this unbonded strand offers superior resistance to deformation under heavy loads. Unlike bonded tendons, which are fixed within the concrete matrix, the unbonded design allows controlled movement, reducing localized stress concentrations and enhancing overall structural resilience. Each wire is protected by a corrosion-resistant coating, significantly extending service life in aggressive environments such as coastal regions, chemical plants, or areas exposed to saltwater and atmospheric pollutants. The lightweight yet robust nature of the strand simplifies handling and installation, minimizing labor costs while improving construction efficiency on large-scale developments. Detailed Description The 28.6mm unbonded PC strand represents a critical innovation in pre-stressed concrete technology. It consists of multiple high-grade steel wires bundled together—each wire independently coated—to form a flexible yet highly durable tendon. This configuration enables even load transfer along its entire length, preventing premature failure under dynamic or seismic forces. Because it remains unanchored to the surrounding concrete, the strand can adjust to thermal expansion, settlement, or vibration without compromising integrity—an advantage often overlooked in traditional bonded systems. The protective sheathing also acts as a barrier against moisture ingress and chemical exposure, ensuring sustained performance over decades. Available in standard lengths and customizable configurations, this product integrates seamlessly into diverse architectural plans and engineering specifications globally. Ideal Use Cases This strand is particularly well-suited for projects requiring long-term stability in challenging climates. It excels in bridge decks, parking structures, highway overpasses, elevated highways, marine piers, and reinforced concrete slabs where flexibility and corrosion resistance are paramount. Architects and engineers working on sustainable infrastructure or seismic-resistant designs increasingly favor unbonded PC strands due to their ability to accommodate movement while maintaining tensile capacity. Whether deployed in urban skyscrapers or remote industrial zones, the 28.6mm unbonded PC strand supports safer, more efficient, and longer-lasting construction outcomes. User Feedback Construction professionals worldwide commend the 28.6mm unbonded PC strand for its ease of installation, reduced need for post-installation inspection, and proven track record in harsh environments. Many users highlight how its flexibility reduces cracking risks during curing and early loading phases—a common issue with rigid bonded alternatives. Additionally, contractors appreciate the time savings during tensioning operations and the lower likelihood of anchor-related failures, contributing to improved project timelines and cost control. Frequently Asked Questions What makes an unbonded PC strand different from a bonded one? An unbonded strand moves freely inside the concrete, allowing for better stress redistribution and reduced risk of crack propagation compared to bonded strands, which are permanently fixed. Is this strand suitable for coastal or marine applications? Yes, thanks to its corrosion-resistant coating and modular design, it performs reliably in saline and humid conditions where conventional reinforcement might degrade prematurely. Can it be used in retrofitting existing structures? Absolutely—it’s commonly employed in strengthening older buildings, bridges, or columns where adding new prestressing elements is essential for safety and compliance with modern standards. How does it contribute to sustainability in construction? By extending the lifespan of concrete structures and reducing maintenance needs, it lowers lifecycle emissions and material waste, aligning with green building principles. What lengths are available? Standard lengths range from 30 to 100 meters, with custom options tailored to specific project requirements including non-standard anchoring configurations and special coatings.
Contact Now
