Hello fellow homesteaders!
Recently I've been conducting research and experiments on all earth building related and as I don't want to bore you with the theatrics of the whole process -I'll get straight to the point.
One question I have for you guys is can cob be rammed to make a stirdy wall? Some will say it wouldn't seem strong enough hopelessly comparing it to the original materials such as sand,cement, and clay in rammed earth but as I see it- Rammed earth is just another type of adobe(using cob made with straw,clay,water,etc) If I'm doing the same process in pressing cob (with the assuption Im building a cob home) isn't that the same as rammed earth?
Secondly - I've made plenty of test bricks in which one had no straw (turned out brittle and more easily crackable); the second was with pine needles, so it was still absent of straw( in which Im starting to believe pine needles just isn't the same because th e difference in the strength of the pine needles is very hard to form into cob balls for the form and the strength of pine needles isn't needed and just gets in the way of binding the materials). And lastly I've made a cob model with pine needles which it turned to rock like the others but as soon as it rained it was stirdy a little but also flimsy. I recycled the earth back to its original place in fustration and I'm hoping ....just hoping regular grass straw or mulch is the answer to my problem.
On a side note , where I live has plenty of red clay, and I use topsoil sand to form the cob which seems to work but If I could get an opinion on my organic material I've been incorporating that would ease me a great lot.