Polyethylene foams, of different colours and diameters, to isolate the steels
One or more plastic single-use special flask (“breakers” with a specific “UFO” design) with PVC tubes attached
An expanding mortar
Once the kit has been introduced into the concrete pile at the correct height, we wait at least 3 days so that the concrete is sufficiently hard (there is no maximum timeframe).
The breakers are then filled with expanding mortar, which creates a vertical traction force of roughly 40 tonnes per breaker over the following hours.
A perfectly clean and horizontal crack cuts the pile and the surplus concrete can be removed from the rest of the pile without impact or vibration. The recépage precision is to the nearest centimetre.
The only technique in the world approved by CETE in Lyon (authorized by French Ministry of Ecology, Sustainable Development and Energy) to be used sooner than the usual 7-day minimum (when this is respected) !
No cracking below the cut-off level : this has been validated by digital simulation.
Savings in time and work: can be counted in weeks! The removal of the surplus concrete can be done at the same time as the levelling work (3 times quicker). When the kit is pre-fixed to the reinforcing cage the labour cost becomes negligible.
Clean site: the integrity of the steel reinforcement is maintained, the pile head is clean and flat, the surface remains undamaged, no need for additional finishing, no need for heavy machines or equipment.
Costs are controlled: the price of the kit varies according to the diameter of the pile and is little affected by the height of trimming. Labour costs are low and easily controlled. Each day saved on site reduces the fixed costs of the whole project.
An ecological and pain-free process: no impacts, noise or vibration. No dust or CO2. Hardship for workers is practically reduced to zero (compared to all other solutions).
• Installing the polyethylene foams.
• Attaching the breakers to the PVC tube.
Breakers are fixed to the reinforcing cage or pushed into the concrete after pouring.
Wait a minimum of 3 days for the concrete to harden, you do not have a maximum.
Uncover the pile head during earthwork before lifting off the concrete block vertically (to avoid bending the steels).