Hydro demolition is a process can be easily described as rapidly washing away aggregates with water.
The above is true, when you think about it, all we are doing is removing the concrete matrix of the sand and cement. The aggregate is dislodged and falls away, in hydro demolition we do not cut through aggregates, we expose them at different levels in the matrix and therefore some fall away at the top of the layer as we are washing whilst others remain imbedded in the remaining concrete.
The statement above is the simplest way to explain how we demolish concrete on many structures in the Middle East.
Hydro demolition for smaller harder to reach areas is carried out with manual high pressure guns with 20,000 psi being the optimum performance with the right flow.
When we are involved with larger projects where superstructures have to be demolished at varying depths, we use our Hydro demolition robots. These robots are used to harness the power of the high pressure jets.
With working pressures of 15,000 psi at up to 50 gallons per minute through the single nozzle the robots make light work of the demolition.
The non vibration method of hydro demolition along with the ideal surface preparation remaining after exposure the method is highly regarded as the best demolition method for concrete repairs.
We can rapidly demolish concrete in varying layers which is ideal for concrete repair projects, with an average demolition depth of 150mm to get below the existing reinforcement.
The reinforcement steel is left undamaged by the hydro demolition process and therefore a suitable skeletal frame of the existing reinforcement is ready for a new batch of concrete to be poured.
Minor repairs to steel reinforcement may be carried out or new steel can be 'lapped in', to maintain the structural integrity of the structure.
Hydroflow have carried out hydro demolition on both new and old structures, the older structures like bridge decks, jetties and dock berths are generally for the concrete repair industry whilst newer concrete structures have been demolished due to changes in design or faulty concrete being delivered to site and poured.
In all the above projects we have undertaken we have successfully completed all projects to the satisfaction of the Engineer and clients alike.