Rethink Your Life!
Finance, health, lifestyle, environment, philosophy
The Work of Art and The Art of Work
Kiko Denzer on Art
[Cob] cob vs adobeLeslie Moyer Unschooler at atlasok.com
Sun Jun 29 16:47:33 CDT 2008
Part of what gives cob its strength is it's monolithic form, with straw from one cob "knitting" into the straw from another cob...as well as the clay platelets aligning with one another and becoming monolithic. When you use adobe bricks, you lose both of these benefits. Adobe has compressive strength, but very little tensile strength bridging from one adobe to another. Basically, I think you would be losing one dis-advantage (cracking) but gaining a couple others. Besides, with cob, the inside of your oven will be round-ish--domed on the inside. This, too, gives it strength. Once you put rectangular adobe blocks in there, you lose not only some oven efficiency, but also some of the integrity of your structure. Cracking just isn't that big a deal. If you build it properly (especially using appropriate amounts of clay & sand & straw), a crack will rarely affect the function or integrity of the oven. And if it does, you just slap some more mud onto it. Someone asked about buying pre-made adobe bricks. I don't know for sure where you can buy them except that they're more readily available in New Mexico, U.S. and Mexico, where adobe is a traditional building material. Other than that, I don't imagine they're readily obtainable. --Leslie Mary Lou McFarland wrote: > I was wondering..... I haven't built my oven yet but I had a thought. I've heard a number of people complain about cracking and crumbling on the inside of their cob ovens. It occurred to me that if the first layer over the sand form were of adobe brick that with it being predried, it might help to eliminate part of that problem. Once the interior was built of the bricks then the other layers could continue as usual. Just a thought. > > Mary Lou > _________________________________________________________________ > Do more with your photos with Windows Live Photo Gallery. > http://www.windowslive.com/share.html?ocid=TXT_TAGLM_Wave2_photos_022008 > _______________________________________________ > Coblist mailing list > Coblist at deatech.com > http://www.deatech.com/mailman/listinfo/coblist > >