Sorry to take so long getting back to this. Had computer problems.
In Missouri there are two hundred or more different species of fesque (fescue) grasses. It's a great big family. We got to using it because we couldn't get our hands on any straw. Farmers have discovered around here that fringe element wackos like to use straw as building material and that has driven the price way up. Go figure. Anyway, a local seedhouse has asked us to find some good use for the hulls they take off the seed they
sell to golf courses. That makes it free, and there are literally mountains of the stuff. We've been composting it with very good results.
Well, we were chopping our straw pretty small to get it to work well with our cimram. We decided to use the fescue with it. Just using the same amount as we did straw worked very well. More than that makes the blocks unstable and they fall apart.
In pouring the adobe blocks you use clay slip, which does not work in a cimram. We use this method in summer when it's good and hot. Our results are fantastic. Like papercrete but stronger, and no cement in the mix. We use fesque hulls and fold in clay slip until it holds a stipple. Then we
spoon it into the forms. The result is light, has better compression that conventional adobe, and even take plaster a whole lot easier. We like.