A new option is available for fixing loose joints in slabs-on-ground. This device relies on a split aluminum cylinder that fits into a vertical core-drilled hole, centered on the problem joint. The cylinder contains a screw-and-wedge mechanism that pushes the cylinder halves apart. An internal spring keeps the cylinder firmly locked in place as the joint opens and closes, within limits. Including drilling the hole, each device can be installed in as little as 10 to 15 minutes and the slab can be immediately placed back in service.