I seen a post here somewhere about possibly cleaning out a concrete process facility that had to do with using the cleanings as a source of calcium but I can't find it now and can't remember if it was good or bad..
I went and looked at a HUGE pile of "Cleanings" at my local redimix and ask what it was.. he says primarily limestone in powder form. Looks a lot like finely crushed limestone with some of it looking "layered" in very small piececs.
Wondering about using some of this the lay in a few areas to pile some gravel/rock/sand on to create some possible spawning habitat for smallies-or anything for that matter. Just not sure about the chemistry of this stuff. He did say there is no added calcium in this that would be used in production concrete??
Would this be a bad idea to use some small amounts of this??