“Fabric formwork has given us the freedom to do complicated structural work in a very different way that’s not complicated at all. That’s the bigger advantage. There’s a lot more flexibility with this system.”
Wet concrete is poured into a tensile membrane, which produces efficient structural curves and extraordinary surface finishes.
The shape is determined by how the material is restricted. This can happen in a number of ways, from creatively using form ties to make “buttonholes” to placing a brick under a fabric form to make a relief
Cast-in-place variable section members
Cast-in-place applications use the dead-weight of the wet concrete to produce deflection geometries that are structurally advantageous.
Pre-cast (inverted) variable section members
Another method of producing efficient variable section members takes advantage of the geometric inversion of pure tension geometries to cast structural members with pure compression shapes.
Prototype of a technical textile application
- I use two type of elastic and strong fabric. Lycra and Viscose.
- I sawed three shapes leaving holes between the two layer to soak it with the concrete.
- I use rapid concrete. I had a problem with this material, the concrete is really fragile and the shape broke in the weak points.
- When I removed the fabric the shape broke
In the second test, I use the gravity to find the shape.
I prepare the mold and sew it in the specific point. Later I soak the mold with the concrete and leave it hanging.