Lightweight Recycled Plastic Formwork for Round & Oval Concrete Columns

Geotub is a reusable modular formwork system made from recycled plastic, specifically designed for the construction of round and oval concrete columns. It can also be used for the rehabilitation, strengthening and structural upgrading of existing deteriorated columns.

Introduced in 2003, Geotub was developed as a lightweight and reusable alternative to traditional timber, steel and cardboard column formwork. Its modular design provides contractors with a practical solution for creating consistent circular and oval concrete structures while simplifying installation, stripping, storage and transportation.

Geotub can form columns with diameters ranging from 25 cm to 100 cm, making it suitable for a wide variety of residential, commercial, industrial and infrastructure projects.

Why Choose Geotub?

Purpose-Built for Round & Oval Columns

Geotub is specifically designed for circular and oval concrete structures, providing accurate and consistent column geometry.

It is suitable for both new construction and structural rehabilitation, including projects where existing columns require strengthening or a new reinforced concrete jacket.

Lightweight – No Crane Required

With a maximum component weight of just 10.5 kg, Geotub components can be manually handled, assembled and dismantled without cranes or mechanical lifting equipment.

This makes Geotub particularly useful for restricted-access construction sites, confined work areas, renovations and infrastructure projects where conventional heavy formwork can be difficult to install.

Fast Assembly & Stripping

The modular components are designed for quick assembly and dismantling, helping contractors reduce formwork installation and stripping time.

Less time spent handling formwork can contribute to improved site productivity and more efficient concrete construction.

High-Quality Concrete Finish

Geotub features a smooth internal recycled-plastic surface that helps prevent concrete from adhering to the formwork.

This allows for easier stripping and produces a clean, consistent concrete surface, potentially reducing the need for additional finishing work.

High Concrete Pressure Resistance

Geotub is designed to withstand concrete pressure of up to 80 kN/m², providing a strong and reliable formwork solution for column casting when used according to the manufacturer's specifications and project requirements.

Ideal for Column Rehabilitation & Strengthening

Geotub is particularly useful for repairing, strengthening and rehabilitating deteriorated concrete columns.

The formwork can be used to create reinforced concrete jackets around existing columns, helping contractors achieve controlled and consistent geometry during structural upgrade projects.

Easy Cleaning

The smooth plastic surface makes Geotub easy to clean after use. Concrete can be removed from the panels with water, helping simplify maintenance and preparation for subsequent casting operations.

Efficient Storage & Transportation

Geotub components are designed for efficient stacking, helping reduce storage space requirements and making transportation and site handling easier.

Reusable & Resource Efficient

Manufactured from recycled plastic, Geotub is designed for repeated use across multiple concrete casting cycles. Its reusable design can help reduce formwork waste and provide a long-term solution for contractors working across multiple projects.

Geotub Applications

Round Concrete Columns

Geotub provides a dedicated solution for constructing circular reinforced concrete columns, with modular configurations available for column diameters from 25 cm to 100 cm.

Oval Concrete Columns

The modular system can also be configured for oval concrete columns, providing flexibility for projects requiring non-standard structural geometry.

Column Rehabilitation & Strengthening

Use Geotub to form reinforced concrete jackets around existing deteriorated columns during structural rehabilitation, strengthening and repair projects.

Seismic Retrofitting

Geotub can be used in seismic strengthening and structural upgrading projects, where existing columns require additional reinforcement or concrete jacketing.

Precast Concrete Columns

The reusable formwork system can be used for the production of precast concrete columns, providing consistent dimensions and surface finishes.

Infrastructure & Utility Structures

Geotub is suitable for a variety of infrastructure applications, including foundations for transmission towers, utility structures and other civil engineering projects.

Civil & Industrial Construction

From commercial and industrial developments to infrastructure projects, Geotub provides a lightweight alternative for forming circular concrete structural elements.

Challenging & Restricted-Access Projects

Because Geotub components can be handled manually, the system is well suited to projects where cranes and heavy lifting equipment are unavailable or difficult to use.