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🎥 Extending the life of your structure: external post-tensioning as a fast-track and durable solution🍃

Have you explored the benefits of external post-tensioning to strengthen your structure rapidly, efficiently, and durably?

💡 Why Choose External Post-Tensioning?

  • Rapid Strengthening: Boost your structure’s bending capacity quickly and efficiently.
  • Active Strengthening: Unlike passive techniques, external post-tensioning becomes immediately active, ensuring durability.
  • Non-Invasive & Efficient: Minimize disruptions to traffic during the strengthening process.

🌱 Benefits at a Glance

  • Durability Priority: Easy inspections and low maintenance for long-term reliability.
  • Design & Build Approach: Smart detailing for swift on-site operations.
  • Step-by-Step Process: From assessment to immediate strengthening.

Understanding External Post-Tensioning

External post-tensioning, situated outside the concrete surface and implemented within or outside the box girder, offers a unique approach to strengthening structures. Connected to the anchorage blocks of the structure, it introduces a compression force that significantly boosts the structure’s bending capacity and contributes to shear strengthening.

Distinguishing itself from other techniques like section enlargement or carbon-fiber strengthening, external post-tensioning stands out as an active strengthening method. Unlike all other techniques that are passive – meaning they only become effective under additional loads, external post-tensioning immediately becomes active upon applying compression force, eliminating the need to clear or divert traffic during or before implementation.

Non-Invasive Efficient Deployment

With its ability to provide active strengthening in an efficient and non-invasive manner, external post-tensioning emerges as an optimal solution, minimizing disruptions to traffic during the strengthening process.

Prioritizing Durability

In any structure-strengthening endeavor, durability is paramount. External post-tensioning excels in this aspect, offering ease of inspections and low maintenance of post-tensioned cables. Its efficiency and durability make it a preferred choice to reinforce structures, enhancing serviceability and inspectability over the long term.

Design & Build Approach

External post-tensioning aligns seamlessly with a design & build approach, carefully considering construction constraints to arrive at an optimum solution. Smart detailing from the initial design phase, incorporating considerations such as access, weight limits, and more, enhances constructability for swift on-site operations.

The implementation process involves four key steps:

  1. Scanning, mapping, and marking : thoroughly assessing the structure and marking critical points for intervention.
  2. Preparation of the existing surface: ensuring the surface is ready for the post-tensioning process.
  3. Blister assembly: including anchorages and deviators in a meticulous construction process.
  4. PT tendon installation and stressing: the final step, activating the external post-tensioning system for immediate strengthening.

In summary, external post-tensioning offers a comprehensive solution that not only fortifies structures quickly and efficiently but also ensures their longevity, making it a preferred choice for a wide range of structures.

Slavica Krstic