[lgalla]

Walter
I have always considered "polymer concrete"to be polyester resin and aggergates.Polyester shrinks 2 to 5%,which maybe worse than regular concrete.Polyester is like other materials we have been discussing.It can continue to cure and shrink for years.This is why your boat or yatch will show print through of the roving years later.This does not happen with epoxy as it is stable after one week.I have tried to distinguish the different names in other posts to catagorise what we are talking about.That is why I named E/G epoxy granite to distinguish it from polymer concrete.
Anything that shrinks with age,and polymer concrete may be worse than reg concrete is not suitable for our purpose.Your design of the filled channels is a good one and worth consideration.The E/G volume would be minimal so forget the concrete coated with epoxy.
Larry

[lgalla]

Walter you posted while I was posting.
I agree from your previous posts we hoby or semi-pros are trying to eliminate welding,blanchard grinding,vibratory stress releif.heat stress releif Prozak stress releif etc.The process is simple.Mix A&B throw in some sand throw in some rocks presto we have a non vibrating machine structure.
Larry