Frequently asked questions

High-pressure water jets break up and remove concrete by targeting weaker material.

The process follows the natural condition of the concrete, removing damaged or incorrectly placed areas while leaving sound structure intact.

Hydrodemolition removes damaged concrete without creating vibrations that can cause microcracking in the remaining structure. It also preserves reinforcement bars, creates a strong bonding surface, and reduces dust exposure compared to mechanical methods.

Hydrodemolition is widely used in repair, rehabilitation and modification projects.  It is commonly applied to remove damaged, deteriorated, or incorrectly placed concrete in structures such as bridges, tunnels, parking structures, and industrial facilities.

No — hydrodemolition is designed to preserve sound concrete and clean reinforcement without causing damage or microcracking.

Yes, hydrodemolition can be performed in cold climates, but additional planning may be required. Protecting water lines, pumps, and wastewater systems from freezing is important, especially during longer projects or low temperatures.

Hydrodemolition is used when concrete needs to be removed while preserving the surrounding structure. This includes removing damaged or deteriorated material, as well as correcting incorrectly placed concrete or modifying existing structures.

It is widely recognized as the preferred method for concrete repair and rehabilitation, and is referenced in standards such as EN 1504 for surface preparation. It is especially effective in projects where structural integrity, bond strength, and long-term durability are critical, such as bridges, tunnels, parking structures, and other infrastructure.

Yes — hydrodemolition is well suited for removing incorrectly placed concrete.

It allows precise and controlled removal without damaging surrounding areas, making it ideal for correcting casting errors or adjusting structures before reapplying new concrete.

Yes — hydrodemolition can be performed underwater with the right equipment and setup.

Because the method uses high-pressure water jets, it remains effective even in submerged conditions, allowing controlled and selective removal without damaging the surrounding structure.

The equipment can be configured for submerged operation to protect sensitive electrical components. For example, by separating or isolating electrical parts from the submerged unit, the crawler can operate underwater while maintaining safe and reliable performance.

Underwater hydrodemolition is commonly used on structures such as bridge piers, quay walls, and other marine or submerged foundations.

Hydrodemolition generates noise mainly from the high-pressure pump and the water impact on the concrete surface. Modern equipment and sound-insulated pump units can help reduce noise levels, making the method more suitable for urban or sensitive environments compared to many traditional concrete removal methods.

Yes – hydrodemolition is considered an environmentally responsible method for concrete removal. It uses water instead of mechanical impact, reducing dust, vibrations, and airborne particles on site. The process also enables selective removal, which minimizes waste and preserves as much of the existing structure as possible. With proper wastewater treatment, the used water can be filtered, reused, or safely discharged in accordance with environmental regulations.

The cost of hydrodemolition depends on factors such as project size, removal depth, access conditions, equipment setup, and water management requirements.

While the initial cost may be higher than some mechanical methods, hydrodemolition often results in lower total project cost. By preserving the structure, reducing the need for rework, and improving bonding for repairs, it contributes to longer-lasting results.

Hydrodemolition systems can also be operated by a relatively small crew, which helps reduce labor costs and simplifies site logistics.

Pressure determines the force of the water jet, while flow determines the volume of water delivered.

Both are essential for performance, but they influence the process in different ways. Higher pressure increases the cutting force of the jet, while higher flow improves removal capacity and productivity.

The balance between pressure and flow depends on the type of hydrodemolition being performed. Shallow surface preparation and controlled depth removal typically require a different balance than deeper or more aggressive removal.

Selecting the right combination of pressure and flow is key to achieving the desired result—whether it’s precise surface preparation or high-production concrete removal.

A complete system includes a high-pressure pump, hydrodemolition robot and water management solution. Together, these ensure efficient and controlled operation.

Hydrodemolition performs best when the high-pressure pump, removal equipment, and water management system work together as one integrated solution.

A balanced system ensures consistent performance, better control, and improved efficiency across different applications. It also reduces setup complexity and supports reliable operation on site.

Choosing the right setup depends on several factors, including the application, access conditions, surface orientation, and required removal depth.

Every project is different, which is why hydrodemolition setups are typically adapted to the specific job. By combining the right equipment, attachments, and configurations, it is possible to achieve safe, efficient, and precise results.

lf needed, our team can support you in selecting and configuring the right solution for your project.

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The required footprint depends on the project and equipment setup. Compact robotic systems and modular support equipment make it possible to work in confined spaces, tunnels, industrial facilities, and other restricted-access areas.

A typical setup includes a high-pressure pump, hydrodemolition robot or tool, water management system, and appropriate containment solutions.

Site conditions such as access, working area, and surface orientation also influence how the system is configured.

Hydrodemolition equipment is designed to be highly adaptable.

By adjusting setups, attachments, and configurations, the same system can be used for a wide range of applications—from large horizontal surfaces to confined or complex structures.

Aqua Cutter models are designed for different applications, depending on factors such as reach, required power, and working environment.

Same models are optimized for compact spaces, while others are built for larger structures and higher productivity. The choice depends on your project requirements.

The pump and hydrodemolition robot must be matched to ensure the correct balance of pressure and flow.

If the system is not properly matched, the robot may not receive the water power it needs, resulting in reduced performance, inconsistent removal, and lower productivity. In some cases, it can also increase wear on components or lead to inefficient operation.

A well-matched system ensures stable operation, optimal removal performance, and consistent results across different applications.

Depth of cut is controlled by adjusting factors such as water pressure, flow, nozzle movement, and the speed of the robot. Robotic hydrodemolition systems allow operators to achieve more consistent and repeatable removal depths compared to manual methods.

Hydrodemolition can be used for both shallow and deep concrete removal, depending on the application.

In practice, removal depth and capacity are controlled by how the process is performed—primarily through pressure and flow, as well as the number of passes (traverses) the equipment makes over the same area.

By adjusting these parameters, the process can be adapted for precise surface preparation, controlled depth removal, or deeper, high-capacity removal.

Robotic systems help maintain consistent nozzle distance, movement patterns, and working angles throughout the operation. This improves removal consistency and helps reduce uneven surfaces or unnecessary concrete removal.

This depends on the capacity of the water treatment system and the total water flow required by the operation.

Larger or more complex projects may require scaling the system to match multiple units or higher production demands.

Production in hydrodemolition is influenced by several key factors that should be considered when selecting equipment.

The most important are water pressure and flow, as these determine cutting power and removal capacity. Concrete strength and required removal depth also have a direct impact on production rate.

Site conditions play a major role as well, including access, surface orientation (horizontal, vertical, or overhead), and the complexity of the structure. In addition, the choice of equipment, attachments, and setup configuration affects both efficiency and consistency of the results.

Matching the pump, equipment, and setup to the specific application is essential for achieving optimal performance on site.

Productivity depends on factors such as concrete strength, removal depth, water pressure and flow, and site conditions.

With the right setup, hydrodemolition delivers consistent and efficient removal across a wide range of applications.

Production rates vary depending on the application, equipment, and concrete condition.

Factors such as depth, access, and setup configuration all influence how quickly material can be removed.

Hydrodemolition allows highly controlled and selective removal.

By adjusting pressure, flow, and movement, operators can remove only the required material without damaging surrounding areas.

Yes — depth can be controlled through setup and operating parameters.

However, variations in concrete strength or previous repairs may influence removal depth across the surface.

Yes — hydrodemolition allows different removal depths to be achieved within the same surface. By adjusting parameters such as pressure, flow, and traverse speed, the removal can be controlled across different areas. Modern hydrodemolition robots also enable this through programmable control systems, where operators can define different depth zones, shapes, and inclinations to achieve varying results within the same area.

Punch-through is prevented by controlling the removal process and adapting it to the structure and required depth.

Key parameters such as pressure, flow, and traverse speed are carefully set, and the removal is typically carried out in controlled passes rather than removing too much material at once. The process is also monitored and adjusted based on the condition and thickness of the concrete.

Modern hydrodemolition equipment further supports this through programmable control systems, allowing operators to define depth and control the removal precisely across the surface.

The minimum removal depth depends on the method and tools used.

For surface preparation, hydrodemolition can achieve defined surface profiles, often described using CSP (Concrete Surface Profile) values according to ICRI standards. Using rotating multi-nozzle tools, surface preparation typically achieves CSP levels from around CSP 3 and above.

For deeper removal using a single waterjet, the minimum depth is influenced by the concrete itself—particularly the size of the aggregate. As a general rule, the removal depth cannot be smaller than the largest aggregate size in the structure.

This means hydrodemolition can be both highly precise and selective, but the achievable depth will vary depending on the tool, setup, and concrete condition.

Wastewater from hydrodemolition is typically either treated directly on-site or collected for handling by a third-party service provider. The approach depends on factors such as local regulations, project size, site conditions, and available infrastructure.

On-site treatment systems can help reduce suspended solids, balance pH levels, and in some cases allow the water to be reused in the hydrodemolition process. In other situations, wastewater may be collected, transported, and treated externally according to local environmental requirements.

Collection methods depend on the project environment, but typically include physical containment such as barriers, vacuum systems, drainage systems, or integrated water management solutions.

The exact method depends on factors such as the structure, location, and environmental requirements — for example when working on bridges, over traffic, or near water.

Hydrodemolition naturally suppresses dust because water is used throughout the process. Debris and removed concrete are typically collected together with the wastewater, helping maintain a cleaner and safer work environment.

Wastewater can be collected directly at the work area and treated on-site using a dedicated wastewater treatment system. By treating the water on-site, it may be possible to safely discharge it according to local requirements or recirculate it back into the hydrodemolition process, helping reduce freshwater consumption.

Yes — hydrodemolition water can be reused when a wastewater treatment system is used.

During the process, water is collected and treated to remove solids and adjust pH levels. Once treated, it can be recirculated back into the system, enabling closed-loop operation.

This reduces water consumption, minimizes waste, and supports efficient operation on site.

Aquajet offers integrated wastewater treatment solutions such as Ecoclear, designed to automate pH balancing and reduce suspended solids, helping simplify water management on-site. The system can also recirculate treated water back into the hydrodemolition process, reducing freshwater consumption and supporting a more environmentally friendly operation.

Yes — with the right setup, hydrodemolition can be performed on submerged structures such as bridge piers and marine installations.

Yes — it is a non-impact method that produces minimal vibration and dust.

With the right equipment, it can also operate at low noise levels, making it suitable for sensitive environments.

Yes — it is widely used for bridge and road rehabilitation, especially for removing damaged concrete while preserving structure and reinforcement.

Yes — hydrodemolition can be configured for vertical, overhead, and inclined surfaces.

By using stable positioning systems and appropriate setups, the equipment can maintain consistent distance and movement across the surface, ensuring accurate and efficient removal.

Hydrodemolition can be adapted to work in complex geometries and hard-to-reach areas through modular setups and guided systems.

By using rail-based or mounted configurations, the equipment can be positioned and stabilized to perform precise removal where traditional robot setups are not practical.

This makes it possible to carry out hydrodemolition in confined spaces, on curved surfaces, or in structurally complex environments.

Yes — hydrodemolition can be applied to curved and circular structures such as pillars, shafts, and tunnels.

With the right setup, the equipment can follow the geometry of the structure, enabling controlled and consistent removal across the surface.

This allows precise hydrodemolition on structures where standard flat-surface operation is not sufficient.

Yes — hydrodemolition is a safe method when performed with the right equipment, training, and procedures.

Modern systems are designed for controlled operation at a safe distance from the high-pressure water jet. By using automated equipment and following established safety practices, risks can be minimized while maintaining efficient and precise concrete removal.

Safe hydrodemolition requires proper planning, trained operators, and the right equipment.

Key measures include maintaining a safe distance from the high-pressure water jet, using appropriate personal protective equipment (PPE), and following established procedures for setup and operation. The work area should also be clearly defined and secured to prevent unauthorized access.

Yes — we offer training through the Aquajet Academy, tailored to your equipment, application, and team experience. Participants who complete the training receive a certificate.

Our training combines theory and hands-on practice to ensure safe operation, efficient use, and a clear understanding of the equipment. It can be carried out on site and adapted to your specific project needs.

We strongly recommend training in connection with every delivery.

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Yes — we provide comprehensive service and support to ensure reliable operation and maximum uptime.

Our team assists with technical support, maintenance, repairs, and spare parts—either remotely, at our service center, or on site when needed. We support you throughout the entire lifecycle of your equipment.

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Yes – we offer on-site support when needed.

Our team can assist directly at your project site with setup, troubleshooting, optimization, and training. This ensures that the equipment is used correctly and that the operation runs safely and efficiently from the start.

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Spare and wear parts can be ordered directly through our team or via your local Aquajet partner.

We help identify the correct parts and ensure fast and reliable delivery. To speed up the process, it is helpful to provide the machine model and relevant details when placing your request.

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Through Aquajet’s global partner network.