Found the video it was actually in a thread recently posted-
http://www.iceinspace.com.au/forum/s...ad.php?t=84547
The videos listed here (to give credit to the person who found them for me)
http://www.iceinspace.com.au/forum/s...2&postcount=11
Personally i think concrete would have a slight dampening affect on vibration. but that also may depend on how thick it is and the mixture.