Cool, if you can get hold of some 4x2 timber set that into the ground parallel to and level with the existing concrete as shuttering. This will give you something to tamp to and provide a clean edge to the concrete.
I has a yard full of 4x2.
@ColinTheBald started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Cool, if you can get hold of some 4x2 timber set that into the ground parallel to and level with the existing concrete as shuttering. This will give you something to tamp to and provide a clean edge to the concrete.