Do you want your concrete construction repaired...

...like this?




After removal with mechanical method

...or like this




After removal with hydrodemolition


AQUA CUTTER MAXIMISES THE BENEFITS OF HYDRODEMOLITION

Hydrodemolition using Aquajet’s Aqua Cutter robots is the ideal way for removing damaged concrete and leaving a good surface ready for reinstatement with fresh material.
Precision control of the high-pressure water from the robot’s jet ensures that sound areas and the embedded steel are left intact.

Today’s Aqua Cutter hydrodemolition robots are faster, easier to use and more cost-effective than ever. They achieve the best possible performance, efficiently remove concrete layers of constant or variable thickness from both flat and curved surfaces. The robotic units can perform vertically, horizontally and overhead as standard, while attachments allow removal in case of special situations such as underneath bridge decks or under water.
Meeting the latest European EN 1504 standards for the repair of concrete structures requires the old concrete to be removed using hydrodemolition.

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Unlike mechanical methods, such as jackhammering, Aqua Cutter hydrodemolition does not damage the rebar or cause micro-cracks in the concrete.
Furthermore, it is far more effective than the use of a hand lance, which is the simplest form of water jetting and is often incorrectly referred to hydrodemolition or concrete cutting.


Selective removal
Aqua Cutter selective Hydrodemolition removes the concrete only down to a preset ‘quality depth’, leaving a jagged or craggy surface that provides an extensive bonding area.
Jackhammers tend to leave a flatter surface, with fewer peaks and valleys and therefore less bonding area.
Another advantage of hydrodemolition is that the Aqua Cutter typically removes damaged concrete several times faster than jackhammers – and users have found that it can be up to 25 times faster. Directing high-velocity water jets against a surface to produce a destructive effect has long been successfully used for the high-speed cutting or drilling of rocky materials and particularly concrete. Hydrodemolition developed from the uses of high-pressure water for drilling, cutting or hole-making in concrete.
Water-jet cutting has also proved to be a versatile technique in many other areas of industry, from early uses in cleaning inaccessible machine parts to modern specialist applications such as the precision cutting of intricate components.






Efficient flexibility
Aquajet’s Aqua Cutter robots are the most advanced on the market thanks to their extensive range of features, ensuring that top quality results are achieved safely at a high production rate with low operating and on-going costs.
The robots are small and compact but at the same time big enough to handle the toughest applications. Their versatility enables hydrodemolition to take place in even the most difficult situations and the use of tracks instead of wheels makes the machines easy to manoeuvre across any terrain. No other hydrodemolition robot on the market can offer the same flexibility.

A multi-axis system has been developed, that enables fast 3D positioning of the front power head so that the unit can be rapidly put to work on any vertical, curved or horizontal surface.

Hydraulically controlled side shifting of the power head offers better reach and easier operation in confined spaces and the power head can be quickly tilted and turned for vertical and ceiling demolition, with no need for additional equipment. Tower sections can be erected easily if required.

Optimum capacity
The Aqua Cutter operates using an easily programmed automated control system, which optimizes the settings and applies only the minimal required force.
The robot works selectively, with its high-pressure jet of water penetrating into the weak concrete as it passes across the surface. The jet breaks up the damaged concrete and flushes it away. All that is then needed is a final clean-up to remove any debris, leaving the clean, rough surface ready for concreting.

The high-pressure water is delivered to the robot through a flexible high-pressure hose. The water travels down a lance where it meets a nozzle, whose opening is sized according to the pressure and flow requirements. The lance manipulates the jet as it leaves the nozzle and can either oscillate or rotate, depending on the type of removal required.
Water jets accomplish their destructive action on concrete by means of three separate processes: direct impact, cavitations and pressurization of micro- and macro-cracks. The nozzle is played rapidly and continuously over the area to be removed. Jet efficiency is maximized when the jet itself is stable, and stability is influenced by the machine design, distance from the nozzle to point of impact, the shape and configuration of the nozzle, the water exit speed, the jet’s movement and the angle of attack.

No other suppliers of hydrodemolition equipment can integrate these key factors as effectively as Aquajet Systems, thanks to its innovative Intelligent Sensing Control system together with its patented high-pressure lance control.





The robot’s EDS equal distance system, together with Aquajet’s specially designed hydrodemolition nozzle offers the best possible performance rate. The EDS system allows for an unbeatable ‘angle of attack’ while keeping the nozzle at the correct set distance from the surface. The angle can be changed by as much as ±30º on standard robots and ±45º on the Evolution models to ensure full speed removal of the concrete between and under the rebar.



Automated operation
Programming the robot is easy as the display panel uses clear and simple pictorial graphics combined with straightforward multi-lingual text. The onboard computer automatically controls and manipulates the pre-set operations. Once programmed, the water jet rapidly and continuously traverses over the area to be removed.

The Aqua Cutter needs no commands during operation in ‘Auto’ mode though the operator can override the computer from the remote control box if necessary.

Comfort and safety are also important features of the Aquajet range, with details such as rubber protective linings to avoid flying debris and provide protection from the noise of the water jet. Standard models are also delivered with a remote control box connected to the robot by a cable, enabling the operator to control and supervise the operation from a safe distance. Wireless radio control is also available.

Whilst two operators are recommended for safety reasons, the Aqua Cutter is easily operated by a single person monitoring the robot as been programmed. The operator can then easily make any necessary minor adjustments to obtain the required depth and quality of cut as well as carrying out tasks such as pulling the high-pressure hose along with the robot, checking the fuel and water levels, as well as ensuring that the next area to be cut is clean and ready.

Performance quality
Some nations require that all hydro demolition specialists pass specific tests before concrete repair or concrete renovation work can begin on any public structure. The tests are performed on specially designed slabs of concrete to determine if the equipment and operators can perform selective hydrodemolition to the required standards. Aquajet Systems hydrodemolition robots have performed and been approved according to all standards.




Example of test slab
Aquajet Systems has as the leading inventor of the technology been in the hydrodemolition business since the early 80`s and have been committed to providing the industry with the best equipment on the market. Together, with the aid of our customers, we continually improve our equipment. It is this dedication to both the hydrodemolition industry and our customers that have made us the world leaders we are today. In order to continue as a market leader we have developed a quality system that is ISO 9000 approved. Aquajet Systems are since 1997 the first ISO 9000 certified hydrodemolition manufacturer in the world.


The Best in the Business – Serving The Global Hydrodemolition Industry.