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-   -   vermiculite/cement 5:1 question (http://www.fornobravo.com/forum/f8/vermiculite-cement-5-1-question-7313.html)

KEmerson 07-23-2009 04:42 PM

vermiculite/cement 5:1 question
 
Sorry if this one is old. I can't find it.
I keep reading about mixing vermiculite or perlite with cement at 5:1. What are we measuring? 5 what to 1 what?
Thanks

Neil2 07-23-2009 05:24 PM

Re: vermiculite/cement 5:1 question
 
By volume.

For example, five shovel fulls of perlite and one shovel full of cement.

And just enough water to make it "workable".

Roadkyng 07-23-2009 05:26 PM

Re: vermiculite/cement 5:1 question
 
mixing of materials is always assumed by volume unless otherwise specified, such as by weight

KEmerson 07-27-2009 03:50 AM

Re: vermiculite/cement 5:1 question
 
so for example if I know it took so many bags of cement to make my structure slab, I can just sort of estimate how many bags it takes to make a slab of a certain size and apply that to the verm/cement mixture? So if I want to replicate the area of the slab, all I have to do is replace some of the cement with the vermiculite for the same total?
Thanks
Kim

dmun 07-27-2009 09:34 AM

Re: vermiculite/cement 5:1 question
 
For all practical purposes the volume of the vermiculite (say, a four cubic foot bag) will be the volume of your vermiculite concrete. The portland doesn't take up that much room.

KEmerson 07-27-2009 10:04 AM

Re: vermiculite/cement 5:1 question
 
Thanks. Very helpful. How did we ever get by before the Internet?
Kim

DimTex 07-28-2009 01:55 PM

Re: vermiculite/cement 5:1 question
 
Before the internet I think we ordered out for pizza.

I poured my insulating layer last Friday and found for the 36 inch oven it took all of 3 four cu. ft. bags of Perlite to fill my forms to the 4 inch level.

KEmerson 07-28-2009 06:11 PM

Re: vermiculite/cement 5:1 question
 
I'm finding it won't take much too. Maybe four or five - tops. And I think $8.75/ 4c.f. bag is probably reasonable.
Thanks


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