Actually he did talk of including aluminum strands, and/or steel wool type material in the material. It is very similar to concrete, and will use local materials that are located on-site. He plans to crush up the rocks and use that as the building material, combined with the binder.

Quote Originally Posted by spyder007 View Post
That's pretty awesome. It sounds like he's using concrete for the walls, wonder if he's considered steel fibers instead of rebar:
http://www.fiberconfiber.com/

That should add the strength he's looking for with more flexibility than rebar.