Choose Sustainability 
with VSL Post-Tensioned Slabs

Did you know that the majority of a building’s embodied CO2 impact comes from the construction of its floors?

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The embodied CO2 impact of a building structure is a significant part of a building construction’s carbon footprint. And the CO2 impact is mainly related to the construction of the floor.

At VSL, our experts are dedicated to finding innovative building techniques that make a real difference.

In this video, we have compared three solutions for cast-in-situ slabs for building construction: reinforced solid concrete flat slab, solid post-tensioned flat slab, and internally voided post-tensioned slab.

See how choosing VSL PT Slabs can truly impact building a more sustainable structure.

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    Reinforced Solid Concrete Flat Slabs

    The reinforced solid concrete flat slab is the traditional and common choice for floor construction. This method results in a higher carbon footprint due to the significant amount of concrete and steel required. While it is widely used, it is not the most efficient in terms of material usage or carbon emissions. It tends to have a heavier structure, leading to increased load on the foundations, columns, and walls.

    Solid Post-Tensioned Flat Slabs

    The solid post-tensioned flat slab reduces the slab thickness and the overall height of the building. By introducing a favorable state of forces, it allows for less concrete and steel usage compared to reinforced slabs. This results in about 25% less carbon emission from the slab itself, without considering additional reductions in the foundation and structural elements due to the decreased self-weight. This makes it a more sustainable option than traditional reinforced slabs.

    Internally Voided Post-Tensioned Slabs

    Internally voided post-tensioned slabs are designed to minimize self-weight and material consumption. They use voids created by polystyrene blocks or plastic spheres, reducing both concrete and steel usage. These slabs further enhance the sustainability benefits of post-tensioning by combining it with voiding techniques. This method offers the lowest carbon footprint among the compared solutions, making it the most efficient choice for cast in-situ floors.

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