Hydro demolition impresses in Singapore 16 Nov 2017

Asian distributor for Aquajet Systems of Sweden, Asia Waterjet Equipment (AWE) have supplied a high pressure Aqua jet system to contractor Tiong Seng-Donagh JV for hydro demolition and concrete removal during construction of the Singapore MRT Great World Station and adjoining tunnels contract on the Thomson East Coast Metro Line.

The Aquacutter 710V 2 removes concrete to reveal starter bars

The Aquacutter 710V Evolution 2 is the state of the art, most advanced hydro demolition and selective concrete removal system available today. Advantages over conventional demolition and removal equipment include:

• It is remotely controlled wirelessly so that it can be operated from a safe distance;
• It has a 7m freestanding tower to allow vertical, horizontal and overhead reach;
• It is faster than conventional concrete cutting methods; and
• It requires no scaffolding or men with jack hammers;
• Using patented technology to oscillate the single ceramic nozzle, with nozzle angle adjustment up to 45 degrees, all can be done from a safe distance using the wireless remote controller.

The system also removes deteriorated concrete, cleans the couplers and does not damage the rebar or create micro cracks. To meet environmentally friendly standards, it creates less noise and the water used can be recycled.

The system from AWE includes a pump, powered by a Cummins 340hp diesel engine, that produces a water pressure of 14,000 bar with a water flow of 95 litres/min that will remove concrete to a controlled depth. The pump and engine can be located above ground up to 150m from the working site in a sound reducing container. The jet with its ceramic nozzle for greater control is connected to the pump via a single hose.