For Bind, 2022 Christoph Weber used concrete from a landfill close to Kassel in Germany, drilled a couple of 20 mm holes to break it into smaller pieces and stuck them into soft casts of beeswax, paraffin, colophony and woodtar. A rare case of upcycling concrete, which cannot be recycled but only downcycled, and even that rarely happens (only a few percent of concrete rubble end up mostly in fills below new streets).