How does



Hydrodemolition is used where most methods of concrete repair or removal would fail. Hydro jet equipment uses a robotic cutting tractor that controls water streams, focusing roughly 20 times the hydro pressure as typical household power washers. Ideal for areas humans cannot safely work in, such as underwater demolitions, runways, bridge decks, or tunnel reconstruction.

Using a process known as hydraulic grinding, or hydro-jetting, most of the high-pressure water jets used in hydrodemolition operate at 15,000 to 25,000 pounds per square inch (psi), grinding any concrete or asphalt down as needed. There are also ultra-high-pressure (UHP) jet models for deeper hydrodemolition that carry a range of between 25,000 to 55,000 psi in hydro force.

The three most common methods for hydrodemolition are:

  • Hydroscarification. An ultra-high pressure way to remove concrete depth of 1/4 to 3/4 inches.
  • Partial Depth Removal. Selective excavation of concrete greater than 3/4’s inch, often used to repair damaged structures or surfaces.
  • Full-Depth Removal. Used for projects where extensive deterioration of concrete makes the full demolition and removal of debris necessary.

A computer-operated screen controls the exact trajectory and force for the high-pressure pumps, while trailers collect the water runoff for reuse. Its capacity for uniform removal of concrete, even in uncertain terrain, as well as cost savings and reduced risks, makes it optimal for industrial needs.

How Hydrodemolition can help you

In hydrodemolition the concentrated water-pressure jets remove concrete, asphalt, and other materials from a surface evenly while also cleaning the surface beneath. The process thus offers a clean substrate for repairs and bonding. Due to its precision, it can also safeguard that any rebars surrounding the target area remain undamaged despite the controlled demolition.

Hydrodemolition efficiently removes damaged or deteriorated concrete from bridges, highways, dams, tunnels, and other structures, as well as underwater demolition, decontamination, and other industrial-strength project needs. Other benefits include:

  • Helps in fixing common concrete errors, such as formwork failures that provoke micro-cracks in concrete.
  • Assists in the repair of concrete damaged by freeze-thaw cycles or de-icing salts.
  • Corrects Compressive Strength Failures from weak concrete, removing ‘bad batches’ of concrete by segregating areas to leave sound concrete intact.
  • Can remove desired amounts of concrete without damaging the sound concrete beneath.
  • Remotely controlled.

With no vibration, noise, or dust pollution, the power and efficiency of hydrodemolition offers a safe, environmentally friendly alternative to traditional demolition methods. The water runoff can also be captured, purified, and reused.

Types & Uses

Conventional and handheld hydrodemolition jets are often used for small projects and hard-to-reach areas. Robotic Hydrodemolition models use robotic cutting tractors to remove concrete from large areas quickly and efficiently. AmmLee Group employs the following hydrodemolition models.

Aqua Cutter 410A. Small and compact, with an articulated arm to reach horizontal, vertical, and overhead areas easily.

The Ergo Go. A compact hydrodemolition unit with four times the power of a hand lance and adaptive manoeuvrability for confined spaces, hazardous waste cleaning, and more uses.

Conjet ACR Robot. It can be operated from a distance of 50 meters and remotely controlled to work on horizontal, vertical, or angled surfaces, as well as underwater.

AmmLee Hydrodemolition

See the latest in AmmLee Group’s cutting-edge hydrodemolition. Learn more about our water jetting services and dedicated experience in Hydrodemolition and Hydroblasting. We’ve worked in the toughest, most inhospitable sites on Earth. Schedule a consultation for your project.

If you would like to hire us for hydrodemolition services, please get in touch for a Free, No-Obligation Quote.

AmmLee Group Roadbridge Case Study

Got a question about hydrodemolition services?

Talk to our experts.

Related Projects

Discover our previous projects

Belfast Harbour Project


North East Highlands of Scotland


Island of Ireland Bridge Project

Robotic Hydrodemolition