Post-tensioning system
OVM specializes in designing, manufacturing, and installing reliable post-tensioning systems. Our solutions adhere to international standards and are suitable for both new and existing structures
OVM Electrical isolation PT System
The OVM Electrical Isolation PT System is a specialized prestressing system designed to provide enhanced corrosion protection and durability for prestressed structures. By incorporating electrically isolated tendons, this system improves long-term performance and enables advanced monitoring of tendon conditions.
Key Features
- Compliance with International and National Standards:
- EAD 160004-0310 – European standard for post-tensioning kits.
- GB/T 14370 – Chinese national standard for prestressed anchorage and tendons.
- fib Standards – Guidelines for prestressing durability and system performance.
- ASTRA 12 010 – Swiss standard for prestressed systems in infrastructure projects.
- Superior Corrosion Resistance:
- Electrical isolation prevents galvanic corrosion by eliminating current flow between tendons and surrounding structures.
- The system is fully encapsulated, protecting tendons from moisture, chemicals, and environmental exposure.
- Extended Service Life:
- Reduces long-term degradation of prestressing tendons, significantly extending the lifespan of bridges, tunnels, and marine structures.
- Offers low-maintenance solutions for critical infrastructure.
- Structural Health Monitoring (SHM):
- Electrical isolation allows non-destructive testing (NDT) to assess tendon condition.
- Enables real-time monitoring of prestressing tendons, allowing early detection of potential failures.
- Applications in Harsh Environments:
- Ideal for coastal bridges, marine structures, underground tunnels, and nuclear containment where corrosion resistance is critical.
- Used in high-risk areas where long-term durability and monitoring are necessary
How OVM electrical isolation PT system works
Encapsulation of Tendons
The system ensures complete electrical isolation of prestressing strands through special insulating materials.
Use of Insulated Ducts & Anchors
Special polymer-coated ducts and anchorages prevent electrical contact with the surrounding concrete or reinforcement.
Monitoring Capabilities
Electrical isolation allows potential difference measurements, which can indicate corrosion activity or tendon integrity issues.
Replaceability & Structural Flexibility
- Tendons can be re-tensioned or replaced without major structural modifications.
- Allows for future strengthening or modification of the structure.
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