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Kiko Denzer on Art
[Cob] off the concrete subjectDamon Howell dhowell at pickensprogress.com
Tue Aug 19 15:37:55 CDT 2008
Ocean was right in saying it was a silly question about straw in concrete. I didn't think of it causing such a stir either, but we may talk about what we feel needs attention, and anything to do with concrete gets cobbers going every time. But unfortunately, cob has it's place, and on the ground isn't it. I have done quite a bit of reading on Roman concrete, which is made from lime and volcanic ash, mixed extremely dry, then packed into forms. The process was pretty much like rammed-earth and it's still there 2,000 years later. Cob doesn't really lend it's self to compaction. Just like in concrete, cob is stronger the drier the mix. But I've noticed when I mix dry I feel like the clay doesn't bond and will not form a solid structure. If I pack it, it bonds, it just doesn't seem to stay together as well. Can anyone enlighten me on this? Damon