Fill an earthbag with sand and gravel and you get instant building material that can be stacked into a hive-shape to create sturdy (earthquake, bullet and flood resistant) eco-friendly housing without cement.
Another Grist find. Earthbags offer a way of building “hobbit-hole” homes without cement:
“Earthbags sound like yet another line of reusable totes, but they’re actually a green building material synonymous with sandbags. Basically you fill big bags with sand or gravel and stack ‘em on top of each other like heavy, squirmy Legos. (Plaster follows.) Iranian-American architect Nader Khalili developed superadobe, a type of earthbag building where long bags filled with adobe are arranged in a beehive shape. The finished product can look like somewhere Frodo would live.”