Loop quantum gravity. Loop quantum gravity (LQG) is a theory that attempts to describe the quantum properties of the universe and gravity. It is also a theory of quantum spacetime because, according to general relativity, gravity is a manifestation of the geometry of spacetime. LQG is an attempt to merge quantum mechanics and general relativity.
Eco Block, ARXX, Logixx are a few along with TriTex. Cost per block is around $12 and they are 5.33 sqft and various thickness depending on your needs. So a 35x43 house would need 234 blocks and about a ton (lift) of rebar, and require roughly 33 cubic yards of concrete using an 8  core thickness.
Price Per Board Foot. Open cell spray foam cost between $0.35 and $0.55 per board foot on average, in 2014. Closed cell ranged from $1.00 to $1.70 per board foot in open spaces and as high as $2.00 per board foot in a confined space.or example, a wall measuring 10 feet high by 50 feet high has square footage of 500. If the wall cavity is 3.5 inches thick, you need a total of 1,750 board feet of spray foam insulation. Open cell spray foam cost between $0.35 and $0.55 per board foot on average, in 2014.