We often hear the term concrete formwork but many of us is not aware of what this really is and its uses. Basically, it is a kind of moulding where wet concrete is poured. The purpose is to provide the user the freedom to control the exact shape of a cured and finished concrete. A formwork is built with almost anything although it is usually built with a combination of aluminum, plywood, steel, or timber. This can also be dismantled as soon as the concrete has fully cured to the desired level or just be left to stay on a permanent basis.
Uses and Benefits
There are different methods that can be applied, as well as types of concrete formwork that comes with numerous advantages. Depending on your needs, you can choose one that best fits the demand. Making a formwork for room foundations of shed, staircases, and walls can be achieved with simple materials.
The basic concept behind a formwork – sometimes called as insulated concrete formwork (ICF) is the making of “walls”. The width, height, and overall design of the walls are flexible so they meet the demands of the job. One thing is certain, though, that formwork has been instrument to some of the most detailed concrete structural designs that we have today.
Short walls do not need so much support and bracing, but as it gets higher, it is a must that you have a support for it. Wet concrete acts the same as to other liquid and produces hydrostatic pressure. This means that any substance in its fluid state will have more pressure at the bottom part of the container and it will lessen with weight. Given this, you need to concentrate on giving more support at the bottom.
Attaching a Formwork
There are different methods to attach a formwork securely. Of course, the thicker and taller the wall is, the more support is required. There is also a variety of hardware available for people specific tasks like walls or columns. In the case of wedges that are hammered into staggered slots, they are used for concrete formwork that has smaller perimeters. On the other hand, long bolts are threaded through sleeves are cut out in order to fit with the formwork. These are often used for larger projects.
The bolts are then removed as soon as the concrete has cured. But in this case, the sleeves will remain. Then the holes are grouted up. This explains why you are seeing some slightly off-color circular tracings in the concrete wall.
Formwork has proven to be a must in different applications in the past and more so in this present time. This is why it’s important to know what they are, their uses, and the benefits it can give us.