A concrete formwork is a kind of moulding wherein a concrete is poured. This is done in order for the user to have greater control over the shape of the finished and cured concrete. This formwork can be built with almost anything, but this is often built using a combination of plywood, timber, and aluminum or steel hardware. At the same time, it can be dismantled when the concrete has cured to a desired level. In some case, it is left behind to stay embedded permanently.
Methods and Types
A concrete formwork involves different types and methods which may serve different purposes. One of the most popular is the one mentioned above and is considered to be more sufficient. Making tiny bits of formwork for fire rated walls, shed or room foundations, staircases, or walls can be accomplished using very simple materials.
The basic concept involved in a formwork is the creation of the so-called walls. These walls will sand which concrete is poured in between. The width, height and overall design and complexity of these walls need to be flexible so it meets the needs of different jobs. It can be very simple as a 1 foot square, 5cm high-deck post base or can more complex such as a labyrinth of foundation pathways, staircases, walls, etc.
Formwork in Structural Design
If there is one thing that is certain, it’s the fact that formwork is behind some of the best and most intricate concrete structural designs which can provided by ICF contractors. Although short walls may not require so much support and bracing, as soon as the wall gets higher, you should not skimp on the support. This is because wet concrete behaves just like other liquid and thus, it can produce hydrostatic pressure. This means that, any substance in its fluid state will have more pressure at the bottom of the container. Given this, you need to make sure that you give focus on the bottom support.
Secure your Formwork
There are different methods that you can apply to attach your concrete formwork securely. But since the taller and thicker the wall is, the more support it requires. There are different hardware to choose from for specific tasks such as for walls or columns. On the other hand, wedges that are hammered into staggered slots in flat bars of steel can be used for formwork that have smaller perimeters. Long bolts threaded through sleeves cut out to fit the formwork are for bigger projects.
These bolts are then removed as soon as the concrete has cured, but the sleeves stay. Then the holes are grouted up which will explain why you often see off-color circular tracings on a concrete wall.