Old 09-05-2013, 10:55 AM
Join Date: Sep 2013
Location: michigan
Posts: 2
Default vermicrete

not sure that last posting posted -- I am attempting to calculate how much Portland cement and vermiculite I need to purchase. I have a 6 ft by 7 ft with a 4 inch depth. Need a 5 10 1 ratio -- any help?
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Old 09-11-2013, 12:07 PM
texman's Avatar
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Join Date: Nov 2009
Location: Amarillo, Texas
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Post Re: vermicrete


That sounds like 14 cf to me of vermiculite. Get some extra, maybe one or two cf if you can. A 5 : 1 ratio should need 3 bags of 90# portland. I dry mixed the vermiculite and portland by pouring the portland over the vermiculite and then mixing that. then add water to get oatmeal consistency.


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Old 09-11-2013, 01:42 PM
david s's Avatar
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Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
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Default Re: vermicrete

For every 10 parts vermiculite add about 3 parts water. I mix the cement and vermiculite dry first then add the water. You will lose around 20% in volume when you mix the water in so this needs to be accounted for.
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