The Crestone Hobbitat скачать в хорошем качестве

The Crestone Hobbitat

Enjoy the tour of Jeff Beard's Hobbitat! This very unique building is made out of pumicecrete. Pumicecrete has been used in constructing buildings for many years. It is simply concrete that uses crushed volcanic rock as an aggregate rather than conventional sand and gravel. Both pumice and scoria, when used in this fashion, render a product that is much lighter than concrete. It also transforms what is usually considered a thermal mass material into something that is much more of an insulator (about R-1.5 per inch), because of all the trapped air. This is very useful, because it makes it possible to actually build a load-bearing structure with an insulating material, as with earthbags filledwith the same crushed volcanic rock. Credit to GreenHomeBuilding.com for the ref on pumicecrete For more info see the links below... http://www.crestoneenergyfair.org/   / 676510912494488     / crestoneenergyfair