Old 10-10-2011, 12:15 PM
Join Date: Aug 2011
Location: Fort Qu'Appelle, SK
Posts: 14
Default Clay sand ratio for cob oven

Hi all
I can't seem to find a sand to clay ration for a cob oven.

I have some clay recommended for WFO.s from a local clay producer.

I have access to sharp masons sand. Planning a 40 inch wide dome oven.

I poured the supporting base yesterday.

It will have to sit for a while as it cool outside.

Fire brick is bought for the floor, and flue liner.

Thanks all
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Old 10-10-2011, 12:50 PM
david s's Avatar
Il Pizzaiolo
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 5,149
Default Re: Clay sand ratio for cob oven

Don't forget to insulate between the supporting slab and the oven floor.
I think the sand, clay proportion is about 50/50 and usually chopped straw is added to the mix to add reinforcing.
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Old 10-22-2011, 09:18 AM
Join Date: Aug 2011
Location: Fort Qu'Appelle, SK
Posts: 14
Default Re: Clay sand ratio for cob oven

Perlite is in place.
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