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Cob wall raising device ?  RSS feed

 
Stephan February
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I've been doing a bit of research into machinery to help with cob building. I happened across the following item while googling something completely unrelated.

http://www.finnbuilder.co.za/gemini.htm

The basic principal is that the device is rammed with a concrete mix and "floated" to the side along the edge of the wall, eliminating the need for brickmaking, since your "bricks" are actually formed in-place on the wall.

I am currently sitting in an office building about as far away from a cob wall as one can get, and my cob-walled cottage in the countryside remains a twinkle in my eye.
However I'm hoping someone on the thread will take a stab at raising a cob wall using one of these devices and documenting their experiences.

Cheers
Stephan
 
thomas rubino
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Location: latitude 47 N.W. montana zone 6A
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Hi Stephan; Cool tool ! I will be very interested if this will work with cobb. I am wondering if cobb mite be stickyer than concreat ? Or does the cobb take to long to set up? Not sure but neat find! My only experience with cobb has been making a rocket mass heater, and it takes a lot longer to "set up" than concreat. If this tool is not cost prohibitive than it could be worth a try.Remember that you wont be sitting in an office forever ! Soon you can be out playing in the mud building that cobb cottage of your dreams! Good luck Tom
 
R Scott
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Location: Kansas Zone 6a
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slipform. Never seen it used for cob.

It used to be common for farmers to use them for concrete, sized to match a batch from their concrete mixer. Troublesome to make it work without getting cold joints.

I had considered the same thing for rammed earth, but gave that up when I realized I needed more concrete and sand to make rammed earth than just using concrete blocks.

 
Peter Ellis
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Location: Central New Jersey
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Strikes me as something that sort of misses the point of cob.

One of the great features of cob is its sculptural quality. This little machine is a way of preventing cob from looking handmade and helping it look like any masonry construction.

It might work, but personally I wouldn't try it.

Where I want big, squared away straight walls I'll go with rammed earth, I think.

 
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