Full Depth Hydrodemolition
The removal of an entire slab of concrete is known as full depth hydrodemolition. Our equipment and ultra high water pressures allow us to remove up to sixteen (16) inches in a single pass.
In cases of waffle slab or pan-joist construction, full depth removes the entire top surface to the joist.
Full depth removal can be limited to certain sections of deteriorated slabs or where cracks have penetrated the entire depth and chloride contamination may have occurred. Like other hydrodemoltion, complete concrete removal does not damage the (remaining) surrounding concrete like traditional methods, and it tends to be much quieter than mechanical, impact methods.
Rampart can completely expose embedded steel reinforcements, leaving them clean and ready for repair, reinforcement or replacement.
We can remove concrete around expansion joints without damaging the hardware or reinforcements, and we can expose all reinforcements at the slab edge to allow splicing new rebar when joining a new slab to an existing slab. In addition, our equipment can completely remove concrete over bridge deck structural I Beams without damaging the beam and shear studs.
We have also successfully removed concrete infill from steel grid decks giving contractors easy access to welds between the grid and structural beams.
Sometimes we have to go to the reinforcements and beyond. Deep removal can range from four (4) to sixteen (16) inches and can be accomplished in a single pass. After removing any reinforcing or embedded objects, we can repeat the process until the full thickness of the reinforced concrete section has been removed. To date, our record is 72 inches.
Rampart has also prepared openings or penetrations in structural concrete in dams, locks and nuclear containment buildings.
Below is a photo of slab floor removal in a parking garage.