[Cob] too much clay

[Dulane]

Until they are dry. Only a few days in high heat. You might want to but them
in a warm place that doesn't get direct sun, like under a picnic table or
other protected but sunny place. Add some sand to another test batch to see
if it dries hard with minimal shrinkage and few cracks. Higher clay will
typically get cracks while drying, and shrink more overall.

Do you use the crunch test? A handful of good cob will crunch when squeezed.


-----Original Message-----
From: coblist-bounces at deatech.com [mailto:coblist-bounces at deatech.com] On
Behalf Of Kristen Davenport
Sent: Tuesday, July 21, 2009 8:41 AM
To: coblist at deatech.com
Subject: [Cob] too much clay

Hello
I suspect (but am not certain) that my soil pile has too high clay content
and too low sand. My question is: If I make some test bricks , how long do I
wait to see if they are cracking too much? How long until I know something
from some test bricks?

Thanks,

Kristen
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