Knocking down concrete walls and pulling up concrete floors is all in a day's work for concrete contractors. However, the concrete that is pulled up or smashed down has to go somewhere after that. Sometimes, some contractors salvage it. That is correct; it becomes concrete salvage! What happens to it next is something amazing. Stacked Slabs Ready for Reuse If a decent job has been done on cutting a concrete floor from an industrial or manufacturing site, and the slabs are fairly uniform, the slabs are stacked against a wall in a concrete salvage or construction recycling site.