Circular formwork

Types of circular formwork

There are three main types of circular formwork: removable, reusable, and circular slip. Each type has its unique features and applications.

• Removable circular formwork

  This is a circular structure created and then removed after the concrete has hardened. It is designed for one-time use only. Once the concrete is set, the formwork is taken off, leaving behind the concrete structure.

• Reusable circular formwork

  This type of formwork can be used multiple times. After the concrete sets, the form is taken off and then reattached for another use.

• Circular slip formwork

  This type of formwork is not removed but instead continuously advances as the structure is built. It is used for tall and circular structures like chimneys or towers.

Each type of circular concrete formwork has a different way of working, either being removed or advancing continuously to create round concrete structures.

Function and feature of circular formwork

Circular formwork has multiple features and benefits that improve the construction of circular or curved concrete structures. Some of the key features and benefits include:

• Modular Design

  Circular formwork is designed with modular components that can be easily assembled and disassembled. This design allows the formwork to be adjusted to different diameters and heights to accommodate various project requirements.

• Adjustability

  The circular formwork is adjustable, enabling it to create circles with different diameters. This adaptability makes it suitable for constructing columns, tanks, silos, and other circular structures of varying sizes.

• Stability and Strength

  The formwork is usually constructed from robust materials such as steel or aluminum, ensuring it remains stable and strong. This stability and strength support the hydrostatic pressure exerted by the liquid concrete during pouring.

• Smooth Finish

  Circular formworks have a smooth interior surface that ensures the concrete structure has a smooth finish. This smooth finish reduces the need for additional concrete surface treatment, saving time and costs.

• Quick Assembly and Disassembly

  These formworks are designed to be assembled and disassembled quickly, reducing the time required to set up the formwork. This feature enhances the overall efficiency of the construction project, especially when multiple circular elements need to be formed.

• Lightweight

  Some circular formworks, such as those made from aluminum, are lightweight. This reduces the physical strain on the workers during assembly and disassembly and enhances the ease of handling.

• Reusable

  Circular formwork is designed to be reusable, meaning it can be used to construct multiple circular concrete structures. This feature reduces the overall material costs and makes the construction process more sustainable.

• Enhanced Safety Features

  Some circular formworks are fitted with enhanced safety features, such as anti-slip footplates and safety harness attachment points. These safety features improve the safety of the construction site and reduce the risks of accidents.

Scenarios of Circular Formwork

Circular formwork is used in various construction scenarios where circular or curved structures are required. Here are some common application scenarios:

• Columns and Stems:

  Circular formwork is commonly used for pouring round columns and stem walls. The formwork ensures uniformly shaped columns with proper concrete curing.

• Tanks and Silos:

  All types of circular formworks, including reusable, movable, and adjustable formworks, are ideal for constructing water tanks, chemical storage tanks, and silos. The formwork creates strong, stable walls for the structures.

• Bridges:

  Circular formwork constructs bridge piers, abutments, and columns. The formwork supports the concrete until it cures and creates smooth, strong piers that can support heavy loads.

• Arches and Vaults:

  Adjustable circular formwork creates arches and vaults in bridges, buildings, and other structures. The formwork supports the curved shapes until the concrete cures.

• Foundations:

  Circular formwork can be used for piling and round footing. For piling, the formwork creates cylindrical piles that can penetrate through hard soil layers. For round footings, the formwork creates circular footings that distribute loads evenly.

• Stairs:

  Curved or circular formwork constructs spiral staircases and curved staircases in buildings and structures. The formwork supports the curved or circular shape until the concrete cures.

• Decorative Elements:

  This includes fountains, columns, walls, and features. The formwork creates the circular or curved shape of the decorative elements.

• Retaining Walls:

  Circular formwork can be used to construct curved or circular retaining walls. The formwork supports the curved shape of the wall.

How to choose circular formwork

• Material

  The first step involves checking the material of the formwork. This is because the material determines the circular formwork durability and stability. It also affects the cost and weight of the formwork. Common formwork materials include steel, aluminum, and plywood.

• Project requirements

  Always analyze the project needs to make sure the selected circular formwork matches the needs of the project. Consider elements like the size and shape of the curved concrete components. Also, consider the placement and the desired surface finish.

• Consultation

  Consult with professionals with experience in the use of formwork systems. These experts will offer valuable insights and recommendations. This will make sure the right formwork is selected for the specific project.

• Cost analysis

  Conduct a complete cost analysis that involves the initial purchase or rental costs and the expected reuse potential of the selected circular formwork. Also, consider the expenses associated with the material. This helps in determining the most economically viable option for the project.

• Logistics

  Take into account the logistics of transporting and storing the selected formwork on the construction site. This is because factors like the weight, size, and number of circular formworks will influence the accessibility and ease of handling.

• Construction techniques

  It is important to consider the construction methods that will be used in the project. This is because some techniques work better with specific types of formwork. For instance, slipforming is compatible with continuous circular formwork.

• Labor skills

  Evaluate the skills of the workforce on the construction site. This is because complex formwork systems need skilled labor for assembly, installation, and disassembly. On the other hand, simple formwork systems can be handled by less experienced workers.

• Safety

  Ensure the selected circular formwork adheres to the safety standards and regulations. This helps in minimizing risks and ensuring the safety of the workforce throughout the construction process.

circular formwork Q&A

Q1: What are the benefits of using formwork circular for concrete?

A1: There are many benefits of using formwork circular for concrete. It is reusable, which reduces the cost of concrete construction. It is also customizable, meaning it can be adapted to different sizes and project requirements. It is lightweight and easy to handle. It also provides high-quality concrete finishes.

Q2: What are the types of circular formwork for concrete?

A2: There are two main types of circular formwork for concrete. They include: Ties and brackets circular formwork and adjustable circular formwork. The two types have different applications in the concrete construction industry.

Q3: How is circular formwork installed and removed?

A3: The process of installing and removing circular formwork is simple. First, the formwork is assembled on the ground using bolts and nuts. It is then lifted and positioned around the circular column or structure. Once the concrete is set, the formwork is carefully removed.

Q4: Is circular formwork suitable for all types of concrete structures?

A4: Yes, circular formwork is suitable for all types of concrete structures. These include columns, tanks, silos, and foundations.

Q5: What materials are commonly used to make circular formwork?

A5: There are several materials used to make circular formwork. They include plywood, steel, aluminum, and plastic.