Pot-Tensioning Setup for R.C.C Slabs

Описание: This image shows a construction setup for a post-tensioned concrete slab system, specifically during the installation of post-tensioning tendons and anchorage system before concrete pouring. Here's a breakdown of what you're seeing:

Post-Tensioning Ducts and Anchor Heads (Blue colored):
The blue plastic parts are live anchorage heads, which hold the tendons (steel cables) in place.
Post-tensioning tendons (high-strength steel strands) run through metal ducts or sleeves and are later tensioned using hydraulic jacks after concrete has cured.

Tendons (Steel Cables):
You can see multiple black steel strands (tendons) bundled and passing into the slab formwork.
These will be tensioned to introduce compressive force, increasing the slab's strength and reducing deflection.

Rebar Mesh (Steel Reinforcement):
The traditional steel reinforcement is laid out in a grid pattern for additional tensile strength, used in combination with post-tensioning.

Formwork and Foam Filler:
The wooden box around the anchorage zone is formwork used to create a block-out or pocket.
Foam or filler is sometimes added to prevent concrete from entering the anchorage zone during pouring.

What Is Happening Here?
This is a pre-concreting stage of a post-tensioned slab system:
Steel cables (tendons) are positioned.
Anchorage hardware is set up.
Once the concrete cures to the required strength, these tendons will be stressed (pulled using jacks) and anchored.

This improves load capacity and allows for longer spans with thinner slabs—commonly used in commercial buildings and parking structures.

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