Restoration of Corrosion Protection
One of the most important tasks of civil engineers to ensure the durability of structures is the corrosion protection of steel elements. DSI offers efficient and advanced methods for restoring the corrosion protection of both prestressing and reinforcing steel.
Vacuum Grouting
Restoring corrosion protection of prestressing steel
Where ducts are not completely filled with cement grout, subsequent grouting must be carried out. This can be accomplished by vacuum grouting. The advantage of this procedure is that regrouting of the duct requires only one drilled hole for each void.
Special devices and techniques have been developed by DSI for careful drilling of ducts to avoid damaging the prestressing steel. The volume of the void is measured by creating a vacuum, which also sucks the grout into the void. A comparison between the measured volume of void and the amount of grout consumed provides a control measure on the success of the operation.