Concrete patching key
PatchPin provides a strong mechanical key when patch repairing damaged concrete.
Reinforced concrete may suffer damage due to spalling caused by the corrosion and resulting expansion of the steel reinforcement. The damage can be repaired by cleaning and treating the exposed steel and filling the exposed area with a suitable repair mortar.
On vertical faces and on the underside of concrete slabs, the bond between the patch and the concrete must be sound to avoid the patch detaching and falling. While compounds used for this should form a strong bond with the concrete, for extra security PatchPins may be partially driven into the existing concrete leaving the remaining end of the tie to be bonded into the patching material to provide a strong mechanical key between the concrete and the patching material.
- To provide a strong mechanical key when patch repairing reinforced concrete
- One-peice, austenitic stainless steel pin
- Hi-Fin helical profile for optimal mechanical connection, without expansion, in the substrate material
- Helical design to ensure powerful bond with patching mortar
- Quick and easy installation
- Additional mechanical bonding security
- Can be installed straight, angled or bent
- Requires no chemicals
- None required
Points to Note
- Pin spacing and position may be varied to suit site conditions.
- Pins are to be installed approx. 50mm from the edge of the patched area.
- Intermediate pins should be at 150-200mm centres. Extra pins may be used at the discretion of the site management or the engineer in charge.
- Pins should be applied at not less than two pins per patch.
|Standard Material||Diameter||Standard Lengths (mm)||Standard Pack||Product Code|
|Grade 316 stainless steel||8mm||70||100||HPP8x70|
Clean the area to be patched by removing all loose material and leave the surface ready to accept an appropriate patching mortar in accordance with the manufacturer’s instructions. Clean and treat any exposed embedded steel.
Drill 6.5mm diameter holes 35mm deep into the area to be patched using a rotary hammer drill with 6.5mm x 110mm SDS Bit.
Fit the PatchPin sleeve driver tool over the drill bit and insert the PatchPin into the end of the driver.
Drive the PatchPins into the holes.
Check that the pins will sit below the face of the finished concrete patch. (Note: pin ends may be bent if straight length is too long.) Apply patching mortar in accordance with manufacturer’s instructions.