Low Relaxation Pre-stressed Concrete (LRPC) Strands are high-strength steel strands used in pre-stressed concrete structures to improve load-bearing capacity and minimize stress relaxation over time. These strands help maintain the structural integrity and durability of concrete components by reducing losses in pre-stress force.

Key Features of LRPC Strands

1. High Tensile Strength – Typically ranging from 1860 MPa to 2160 MPa.
2. Low Relaxation – Retains pre-stress force effectively, minimizing long-term losses.
3. Multiple Wire Configurations – Usually available as 7-wire strands (most common).
4. Surface Finishes – Includes plain, indented, galvanized, and epoxy-coated options.
5. Diameter Range – Generally between 9.5 mm and 15.7 mm (or 3/8” to 0.6”).

Advantages of LRPC Strands

✅ Higher strength-to-weight ratio compared to conventional reinforcement.
✅ Improved structural performance with longer spans and reduced material usage.
✅ Enhanced durability due to better resistance to creep and stress relaxation.
✅ Cost savings over time due to lower maintenance and longer service life.

Applications of LRPC Strands

???? Bridges & Flyovers – Used in girders, beams, and deck slabs.
???? Buildings & Precast Concrete – Found in slabs, beams, and precast elements.
???? Railway Sleepers – Ensures stability in rail track foundations.
???? Tunnels, Dams & Marine Structures – Offers resistance in aggressive environments.
???? Wind Turbine Towers – Provides high-tension support in concrete towers.