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hearman 09-05-2013 10:55 AM

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?

texman 09-11-2013 12:07 PM

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.



david s 09-11-2013 01:42 PM

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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