Typically, a post-tensioned slab is a flat slab, band beam, and slab or ribbed slab. This slab offers the thinnest type of slab, as concrete is worked to its strength, mostly being kept in compression.
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A post-tensioned slab uses high-strength tensioned steel strands for compressing the slabs, which keeps the majority of the concrete in compression. This offers an efficient structure that helps minimise material usage and decrease the economic span range in comparison with reinforced concrete.
Now you know how does post tension concrete work.
Post-Tensioning Vs. Pre-Tensioning| Post-Tensioning | Pre-Tensioning |
It can be done on the site as well as in factories |
It’s done in the factories and that’s why it’s suitable for precast construction works |
A member’s size isn’t restricted, long-span bridges are built by post-tensioning |
Small sections are to be constructed |
Loss of prestressing is not more (about 15 percent) |
Loss of prestressing is not less (about 18 percent) |
Products are changed as per structure in this method. |
Similar prestressed members are prepared in this method. |
Prestressing is done after the concrete achieves enough strength in this method |
The concrete is prestressed with tendons before it’s kept in position in this method |
This method is developed due to bearing. |
This method is developed due to the bonding between the steel tendons and concrete. |
It is preferred when the structural element is heavy. |
It is preferred when the structural element is small and easily transportable. |
It is more expensive because of the use of sheathing |
It’s cheaper because the cost of sheathing isn’t involved |
Read more:
What is prestressed concrete?
What is air entrained concrete?
What is honeycombing in concrete?
What is plum concrete?
I hope now you have a complete understanding of what is precast post tensioned concrete.
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What is a post tensioned concrete slab?
Zeeshan
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2 Year
2022-08-05T19:00:01+00:00 2022-08-17T17:10:29+00:00Comment
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