Replies

1. 
   RW | Mar 14, 2004 07:16am | #1

   I'm not going to be the end of your search, but a family friend was a construction engineering prof here, and he was the concrete man. The university here did this thing I thought was nuts - making concrete canoes and racing them down the Niobrara river every year. But he gave me a sample of the concrete, which used styrofoam as an aggregate. Darn if the stuff doesn't float, and it was strong. The cylinder I have as a sample still is about 10" tall, 4" across, and round. It weighs about as much as a can of Skoal. Strikes me as worth looking in to. Someplace in Omaha also experimented with using fly ash, all I heard was the results were good, strong and light, but how light I haven't the foggiest.

   "The child is grown / The dream is gone / And I have become / Comfortably numb "      lyrics by Roger Waters

2. 
   davidmeiland | Mar 14, 2004 08:15am | #2

   You might want to check out the forum at heatinghelp.com. There are a lot of radiant contractors there, and they use various lightweight mixes as part of radiant floor installs.

1. 
   brownbagg | Mar 14, 2004 03:42pm | #3

   i got the recipe for lightweight at work, i get it tomorrow