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lfry 12-20-2016 08:44 PM

adobe for sculpting
Years ago I used a recipe for adobe that included clay, cement, and acrylic admix that worked well, but I can't find it. Does anyone have a good concoction they've used?
Basically I'm looking for a material that can be modeled easily over an armature and can last outdoors. Concrete isn't great for modeling details.

Andrew Werby 12-21-2016 03:12 PM

Re: adobe for sculpting
I doubt that mixture would work in the way you describe. The clay will want to shrink against the armature and crack, and the weather would degrade it further. I doubt there would be much left after a couple of years of freeze/thaw exposure. Adobe structures depend on a roof to keep them from dissolving in the rain. Maybe it would last longer in the desert, though.

raspero 12-21-2016 06:53 PM

Re: adobe for sculpting
I had an adobe house for years. What Andrew says is right on. You need long overhangs on the roof, and you paint on a sealer at least once a year. I used an acrylic sealer. Out in the sticks they use burro shit and water.

The guys who made the bricks used a clay/sand mix, basically the same thing they use for fired brick.

We have been building some schoolhouses here using something we call Eco-block. It's dirt and cement mixed with a bit of water and rammed in a press. It seems to be pretty weather resistant.


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