Gerryv,

The ductal product you sent the link on is interesting and has properties similar to the E/G product we are researching making and in some cases better properties. It is a commercial product and I would assume it is expensive. I didn't get a sense of the vibration damping qualities from my perusal of the spec sheet. This is however one of the first engineered concrete products I've seen that starts to incorporate materials science instead of brute force pour and test techniques.

We're trying to make an inexpensive epoxy composite out of cheaply available materials so this isn't what we're doing but it's a good read none-the-less.

Thanks for the post.