Our range of ultra high pressure water blasting is ideally suited to hydro demolition machine applications. This, coupled with our range of hydrodemolition accessories, ensures we can supply you with the complete package.
Hydro demolition machine allows the safe, selective removal of concrete using ultra high pressure water.
There are many reasons for using hydro demolition machine including: no damage to rebar, no damage to underlying structure (no microcracks). The ability to access confined work spaces, and increased productivity over traditional techniques.
Hydrodemolition technology removes concrete using water pressure of up to 3000 bar, for long-lasting, high quality repairs. It creates no micro-cracks and leaves an ideal bonding surface for the fresh concrete.
Our hydro demolition robot travels over the concrete surface at a constant speed, taking advantage of the concrete’s permeability to create an overpressure that breaks it apart. The automation of the Watex robots allow operators to easily execute both selective and non-selective removals.
Two remval methods with hydro demolition machine
Selective removal is the preferred method when only the deteriorated concrete needs to be removed. The hydro demolition robot uses high-pressure water up to 22,000 psi (1500 bar) to selectively remove concrete at a predetermined quality level.
Non-selective removal is the preferred method when concrete needs to be removed to a predetermined depth, independent of the quality of the concrete. Watex robot uses high-pressure water above 22,000 psi (1500 bar).
No matter what option you choose, the high-pressure water jet technology will create a rough surface optimal for bonding of new concrete without creating any micro-cracks or damage to the remaining structure. At the same time, it leaves the rebar intact and cleaned from rust and corrosion.
With hydro demolition robots, you control the end result, always ensuring you meet the customer’s specifications
Hydro demolition machine robot
Watex hydro demolition robots removes concrete by moving a high-pressure water jet over the surface in a pre-determined pattern at a pre-determined speed until the desired depth is reached. This is repeated over the entire surface in order to guarantee the same quality depth over the entire structure.
The remaining surface is free from delaminated or otherwise damaged concrete leaving a perfect surface for the new concrete to bond to.
In the process of hydrodemolition, no micro cracks are introduced to the structure. Neither does hydrodemolition cut the rebars. If there is corrosion on the rebars, it is removed in the hydrodemolition process.
By adjusting the proper pressure and flow rate, a more or less selective removal is achieved. Below a certain pressure level, the water will not cut the aggregate, only the paste bonding the aggregate together. Since the water follows the laws of hydraulics: easiest way out, the less competent concrete will be removed, and the stronger will remain. This is what is called “selective removal”.
Through the increasing pressure, the operation is still selective but when starting to cut the aggregate the selective zone decreases. That means that the surface may contain concrete with lesser strength that the surrounding material.
Repairing a large concrete with jackhammers is simply ineffective and causes lots damage to the remaining structure. Requiring extra work to repair and can not gurantee the integrity of the structure,expecially for the bridge .
Watex hydro demolition robot can do the work of up to 35 jackhammer operators, can increase productivity and improve safety. Noise is greatly reduced, and silica dust exposure .