Re: Epoxy-Granite machine bases (was Polymer concrete frame?)
It seems to me the article is not really scientific but primarily using a scientific path to bring structure to a question.
"50% coarse granite and 50% fine granite" can by no means be repeated by others.
Somewhere it is mentioned that excess hardner is not used in the matrix but that is only half the truth. The excess hardner takes away strenth from the matrix that it would have had if there had been no excess.
Epoxy ratios need to be kept as the manufacturer states, using other ratios will weaken the mix.
Sven
http://www.puresven.com/?q=building-cnc-router