What is Shotcreting and How Does it Work?

The team of geotechnical engineers here at Condor Projects can take on any kind of challenge thanks to a wide range of techniques at our disposal. Shotcreting is the process of spraying concrete, which can be applied to bridges and retaining walls to ensure reliable stability for many years to come. Our clients include multiple highway departments and local authorities based around the UK, reflecting the quality of this specialist service.


What is shotcreting?

The process involves the pneumatic application of concrete at high velocity onto horizontal or vertical surfaces, making it a highly versatile solution. Due to the force created by our powerful equipment, the placement and compaction of the material are combined during its application. This means that shotcrete can also be used for curved surfaces too, such as tunnels and domes.


Why is it a popular option?

As a system, shotcrete has been around for over a century. During this time it has been redeveloped over and over to increase precision and efficiency whilst reducing the associated costs. As a result, shotcreting is more economical than the traditional application of concrete due to it being a faster and more direct process.

Simultaneously, shotcreting requires relatively little space during the construction phase, which means minimal activity on the site. Whether it’s taking place on private land or a public highway, the fewer vehicles and workers required, the less disruption there is.


Strong, sturdy and dependable

When you choose shotcrete, you’re investing in a highly durable solution that comes with excellent structural integrity. Shotcrete is also developed to be resistant to fire, mould and worms, ensuring that it remains intact for a very long time. Meanwhile, its low levels of permeability mean that it doesn’t deteriorate even when the British weather bombards it with rain and snow.


Dry and wet systems

Our experts can apply either the dry (Gunnite) or wet form of shotcrete. The first involves placing the dry ingredients into a hopper and then propelling them through a hose to the nozzle, where the water is added manually. The dry ingredients and water fully mix when they hit the surface.

The wet system uses prepared concrete, with compressed air introduced at the nozzle to thrust the mixture onto the receiving surface.


What’s the difference?

Usually, the dry system is used for small to medium jobs. It’s easy to set up, shut down and clean up afterwards. The wet system is more suitable for larger projects, as the required volume is prepared beforehand and can be applied more quickly.


Additional advantages of shotcreting

Perfect for repairing existing concrete as well as fortifying bridges, tunnels and retaining walls, shotcreting is an affordable and speedy process. It’s also useful for hard to reach places and irregular surfaces, provides exceptional corrosion resistance, and improves the load-carrying capacity of the surface due to the wider distribution of stress.


Get in touch

If you’re interested in finding out more about shotcreting, call our team on 01757 288900 or fill in our contact form and we’ll provide a tailored quote to suit your exact requirements.