This round straw/dirt brick was a quick attempt to see what would happen if we scooped some of our soil in with some straw--mixed it with water and left it in the sun for a couple of days.
It set up fairly well. It's pretty solid. We will need to sift the soil to remove the pebbles and rocks. And use less straw. Other than that, it should work.
So what's the plan for this? The floor's second level (of four) will just be clay (our dirt) and straw. We also are toying with the idea of using this for a few nooks and crannies in the walls to the addition. We will have some "triangles" to fill...so this could be our solution.
Looks like a drunken bird built this...