15 June 2011

Shake Test


Video blog today, showing how to test your soil for clay
content, including worm test & shake test


4 comments:

  1. Hi Sigi,

    Can you advise how much water I should use to make clay putty (from powdered clay)? There aren't any instructions on the bag.

    Thanks!

    Diane

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    1. Huh, good question...not sure I've ever measured... I'd say one 50-pound bag of dry clay probably makes two 5-gallon buckets of clay putty. But the consistency you want is thick sour cream, if that helps.

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  2. ok thanks! I'm excited as Monday I start cobbing & then clay plastering. I'm actually doing an outdoor sculpture.

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    Replies
    1. Nice! Are you using bagged clay for your cob as well? Or just for plaster? If for cob also, you might want a bit less water, or you won't be able to build very high each day. Also, you may want to do test bricks to get your sand-to-clay ratio correct before you begin...since different clays have different binding capacity (stickier clays want more sand in the cob/plaster to minimize any cracking).

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