Walter,
I have not given up with the testing, just have not made too much progress, so I have not posted anything yet.
I made another batch of E/Q with 8% epoxy by weight and adjusted the ratios of the quartz sands. The result is a little better than what I got in the first round.
I rigged up a vibrating table and used a Dremel tool to produce the vibrations, it's pretty good at producing vibrations...
2) 8% epoxy by weight is too dry, at least for now while I don't have a process in place. I'll try a 10% mix next (actually, it's made already, just waiting for it to cure).
Regards
Sandi