PatchPin
Concrete patching key
PatchPins have been designed to provide bonding security 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.
APPLICATIONS
- Providing a strong mechanical key when patch repairing reinforced concrete.
FEATURES
- Stainless steel helical pin.
- Forms powerful bond with patching mortar.
- Additional mechanical bonding security.
- Can be installed straight, angled or bent.
- Requires no chemicals.
- Quick, simple and effective.
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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.
INSTALLATION
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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.
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Drill 6.5mm diameter holes 35mm deep and then drive the PatchPins into the holes using a PatchPin support tool fitted to an SDS hammer drill set to slow speed and light hammer only.
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Check that the pins will sit below the face of the finished concrete patch (pin ends may be bent if straight length is too long). Apply patching mortar in accordance with manufacturer’s instructions.
| TECHNICAL SPECIFICATIONS | ||||
|---|---|---|---|---|
| Material | Diameter | Standard Lengths (mm) | Standard Pack | Product Code |
| Grade 316 stainless steel | 8mm | 70 | 100 | HPP8x70 |
| '' | '' | 100 | 100 | HPP8x100 |
