Taz, I looked over some of the ACI links and I didn't see (though I might just have missed it) what the effects would be if the concrete made using fly ash was pulverised. Would it then be actually hazardous waste again (not just labeled as such by the EPA, but actually hazardous) ? It's quite common for concrete to be recycled these days and if it's made with fly ash that might be a bad thing to do if it's will release the toxins. Maybe concrete with fly ash will need to be colored or have some embeded tags to make it known it's not to be recycled?
Edited by kjsimons, : No reason given.
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