Old 06-29-2008, 08:47 AM
Join Date: Oct 2007
Location: SC usa
Posts: 126
Default Re: TIP: Mixing Vermiculite Concrete

I had so many bags of vermiculite that I wasn't really keeping count when making the oven complex, but I starting getting concerned about quantity when doing the pool bottom. About Halfway through, I figured I was getting about 3 cubic feet out of a bag and had to adjust my depth accordingly to make sure that what I had covered the area. Then at the end, I ended up with 7 bags left over, so thought that maybe they were about 3 & 1/2 feet.

I noticed they were actually packed by weight and not by volume... I think there is a lot of settling, plus the act of mixing compresses out the air spaces...
Paradise is where you make it.
Reply With Quote
Old 04-24-2009, 05:51 PM
Join Date: Apr 2009
Location: Raleigh, NC
Posts: 5
Default Re: TIP: Mixing Vermiculite Concrete


I just mad concrete using 4 cubic feet of vermiculite and .6 cubic feet of portland and filled 16 sq. ft. 3" deep. That works out to 4 cu.ft.
Reply With Quote
Old 04-25-2009, 10:29 AM
Neil2's Avatar
Il Pizzaiolo
Join Date: Oct 2006
Location: Vancouver Island
Posts: 1,374
Default Re: TIP: Mixing Vermiculite Concrete

"For the pool vermicrete, I could have borrowed a neighbor’s concrete mixer"

I found that using my concrete mixer tended to "break down" the vermiculite particles. This made for a higher density - not as good for insulating. I now mix it by hand using a small garden shovel and wheelbarrow.

Also consider adding perlite (large granules). This seems to improve the workability if you are using a screed to archive the dome shape.
Reply With Quote
Old 04-25-2014, 12:37 PM
Join Date: Apr 2014
Location: new Prague mn
Posts: 2
Default Re: TIP: Mixing Vermiculite Concrete

Does anyone know if you can lay the oven floor on the vericrete or do I need to pour a slab over the top of the vermicrete. If so how thick should this be??
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Can I use insulating vermiculite concrete instead of mortar clading waynebergman Pompeii Oven Construction 4 12-30-2009 06:20 PM
Concrete mixer basics dmun Getting Started 11 06-05-2009 05:48 PM
Refractory cement in vermiculite concrete Brian Hudson Getting Started 3 03-25-2008 06:37 PM
How should vermiculite concrete look once it is cured? vincentvintris Getting Started 10 04-25-2007 02:47 PM
Super Isol vs. vermiculite concrete Alan Getting Started 4 08-03-2006 04:57 PM

All times are GMT -7. The time now is 01:35 AM.

Powered by vBulletin® Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
© 2006/10 Forno Bravo, LLC