Has anyone used this? It's basically recycled concrete that can be used as 2a modified just cheaper....atleast around here. I looked at some and even though it's certified it seems like a lot of dust to me. Would this make a good backfill on a retaining wall or would it compact too much?....if there is such a thing. Now before you jump down my throat, I'm not talking directly behind the wall. I'm talking about instead of your fill dirt behind the drainage stone. I can actually get this stuff trucked in just as cheap if not cheaper than fill dirt. What do you guys think?