Fixing sleeper plates onto concrete (sleepers, bearers or slab) without ferrules.
The SlabLok® System offers an ecomonic and permanent solution that addresses two commonplace issues observed in the field:
- The need to fix plates to either concrete sleepers or concrete slab without the need to have pre-set ferrules.
- Replacing failed screw spikes set in ferrules in concrete turnouts and concrete slab installations.
The SlabLok System comprises two components and a number of steps.
The components of the SlabLok System are as follows:
How it Works
The steps involved in replacing a failed Screw Spike/Ferrule are as follows:
- Remove existing ferrule utilising a 42mm core drill (if the hole has a broken screw in it) or a 40mm masonry drill (if no screw broken in hole) - video link here - to a depth just greater than that of the ferrule.
- Remove the ferrule/concrete slug.
- Clean and dry the hole.
- Fill the resulting hole with Filler-Lok.
- Allow to cure (approx 30 minutes).
- Set plate in desired positon to gauge and drill holes - 22mm spade to 20mm and 19mm full depth.
- Install and fasten GageLok 24 using impact driver 400Nm torque max.
Using two, four man crews, a minimum production rate in the range of 60-80 screw replacements can be achieved per 8 hour shift starting from taking track possession, removing existing hardware and sleeper plates, core drilling, filling, curing, drilling, re-fitting plates and track hardware and finally screwing GageLok 24's into place and handing back track possession.
The SlabLok® System is currently undergoing pull out testing and 3M cycle cyclic load testing in a concrete bearer. Trials are underway with ARTC. Pull out tests exceed AS1085 requirements. Results available upon request.