Anchorage, as a critical piece of equipment in industrial production, has a tensioning efficiency that significantly impacts the overall operational efficiency of the system. Therefore, during routine use, it is essential to regularly check whether its tensioning performance meets our construction and application requirements. How to improve the tensioning efficiency of anchorage is also a frequently encountered issue for us at Tianjin Prestressed Anchorage during the construction process.

Due to the inherent characteristics of the production process and materials used in prestressed concrete, the stress in the prestressing tendons continuously reduces throughout the entire process—from tensioning and anchoring to the installation and service of the member. This reduction in stress value is referred to as the prestress loss.

In the construction of new projects at major work sites, steel strands are widely used. Tianjin Prestressed Anchorage points out that they are primarily applied in bridge construction, where they enhance the structural stability of the bridge, thereby significantly increasing safety for users. Steel strands are steel products composed of multiple wires twisted together. The surface of the carbon steel can be treated as needed with coatings such as galvanized layer, zinc-aluminum alloy layer, aluminum-clad layer, copper coating, or epoxy resin.

In industrial production, equipment wear and tear is a frequently encountered issue. With daily use over time, all things eventually reach the end of their service life. Proper maintenance and correct operation during daily use are the most effective ways to extend equipment lifespan. This applies equally to intelligent tensioning equipment, which requires regular maintenance and care from us at Tianjin Prestressed Anchorage. So, which parts of this equipment are most prone to wear and tear?

Slippage of Tendon Due to Rust on Anchorage, Strand, or Clamp

The principle of self-anchoring systems relies on the teeth/grooves on the clamp gripping the steel strand, and the wedge effect created as the clamp is drawn into the conical hole of the anchor ring, thereby locking in the prestress. If rust or other contaminants fill the teeth/grooves, preventing proper grip on the strand, or if the teeth themselves are corroded, reducing their strength, slippage may occur.

(1) Cutting Prestressing Tendons: Use a grinding wheel saw for cutting prestressing tendons. Arc cutting must not be used.

(2) Strand Bundling: When bundling steel strands, straighten them one by one and bind them into a neat bundle to avoid tangling. For fixed-end extruded or button-head anchors, assemble them beforehand with the bearing plate and spiral reinforcement.