Before starting the concrete work, it is essential to know the different concrete stages. These stages include Formwork, Mixing, and Curing. To learn more about the various stages, read the following articles. The next part of this article deals with the surface finishing of concrete. It is also important to check the stability of the structure.
The design of a Formwork for Concrete must consider concrete’s structural and physical characteristics. These forms must be waterproof and rigid to carry heavy loads and resist shrinkage and swelling. The design should also minimise the chance of deflection and allow for small variations. Sturdiness is another important factor to consider. The materials used in the Formwork for Concrete must be rigid and leak-proof and tightly sealed joints. Non-movable supports should support the formwork to prevent it from shifting while the concrete is being poured.
Modern construction involves a variety of concrete structures, each with its formwork requirements. No one formwork will be more suitable for every construction project, but there are some general guidelines to follow when choosing formwork. You can consult the Concrete Reinforcing Steel Institute’s 10 Steps to Economy in Formwork for Concrete to determine which type is best for the specific project. The guidelines also include tips for comparing the costs of different forms.
Timber forms are the most popular formwork for concrete. They are lightweight and durable, but they can also warp or crack as the concrete sets. Make sure to use properly-treated timber that has been thoroughly dried. Avoid wood with loose knots. Wood can warp and be vulnerable to rotting from water that has been added to the concrete. The use of a sealant will help prevent this from happening. Depending on the nature of the project, timber can be a very good option.
Another common method of forming concrete is the use of shutters. These forms are temporary moulds used during the construction of concrete structures. The shuttering materials are often made of timber or plywood, but they can be made of other materials. The former is a traditional choice and works best for vertical concrete projects, while plywood shutters are cheaper. Plywood shutters are also recyclable, which is a bonus. But make sure to check that the plywood is water-resistant.
Mixing and placing concrete requires careful planning, efficient transportation, and adequate materials. This site will explain each step in the process and analyse its effectiveness. Mixing concrete involves the complete blending of the materials used. There are two main methods of mixing concrete: by hand and by machine. Machine mixing is more common. For each method, the following guidelines are used. Listed below are some important factors to consider when selecting the mixing equipment. Make sure to read the materials’ specifications carefully.
The proper curing of concrete is crucial in preventing creep and shrinkage in the structure. The key ingredient in concrete is water, which causes a chemical reaction with cement to achieve strength. The concrete needs to remain moist for at least 24 hours after casting. Otherwise, it will dry out, and the water content will evaporate into the air. As a result, it causes a loss in the surface layer’s strength, often visible in cracks.
Wet coverings are common when curing concrete. These should be placed as soon as the concrete starts to harden. They should be kept continuously wet, with a film of water on the surface. For vertical walls and columns, wet coverings are a good option. In hot weather, these coverings should be kept moist, as they will protect from moisture loss. This method is also used for large concrete slabs.
Another method of Concreting SA is continuous sprinkler irrigation. This method prevents the concrete surface from drying. While continuous wetting is not as effective as continuous pouring, it’s still effective in dry conditions. One drawback of continuous sprinkler irrigation is that water cannot be constantly poured on the slab. In addition, it is important to remember that the water should not be cooler than the concrete. If you’re using this method, make sure that you install a kerb around the slab to prevent the water from running off into the surrounding area.