Forno Bravo Forum: The Wood-Fired Oven Community

Forno Bravo Forum: The Wood-Fired Oven Community (http://www.fornobravo.com/forum/)
-   Newbie Forum (http://www.fornobravo.com/forum/f2/)
-   -   Vermiculite cure time. (http://www.fornobravo.com/forum/f2/vermiculite-cure-time-2813.html)

JAG 10-22-2007 07:41 AM

Vermiculite cure time.
 
Hi all,

Rookie builder here. I have just finished the vermiculite pour of my hearth, and I was wondering if someone could tell me what kind of cure time I can expect, also is there any needed curing of the vermic. layer as there was with the concrete layer?

Thanks,
John

asudavew 10-22-2007 08:16 AM

Re: Vermiculite cure time.
 
If it feels hard and setup.. you are fine to start building your dome.

Mine was pretty hard the next day.

gjbingham 10-23-2007 09:22 AM

Re: Vermiculite cure time.
 
I just poured mine yesterday morning. It was pretty well set by early evening. It's definitely hard this morning.

Frances 10-23-2007 12:35 PM

Re: Vermiculite cure time.
 
Well, mine took about a week to get hard, and continued getting still harder for a week after that. I think I'd recommend waiting for a week before starting the dome - its the cement component which hardens after all, and that just needs some time.

However, I remember reading a thread recently (wish I'd read it when I was at that stage) which says you shouldn't cover the vermiculite layer like you do cement, because it already absorbs so much water while mixing.

Hope that helps...
Frances

Neil2 12-09-2007 04:19 PM

Re: Vermiculite cure time.
 
This is a type of concrete. The portland cement in the mix will need water to cure. Keep it covered and wet for at leat a week minimum. Three weeks would be better.

I would say you could start building the dome about 3 days after the pour.

joninaz 12-22-2007 12:47 PM

Re: Vermiculite cure time.
 
Along the same lines, is it better to cure when it's warm/hot or cold out? For example, I'm in AZ and am concerned about curing "too fast" in our very hot summers.

dmun 12-22-2007 07:54 PM

Re: Vermiculite cure time.
 
I think fourty degrees F. is the magic number. Below that temperature the concrete weakens considerably. It's also hard to work with wet heavy stuff when it's cold.


All times are GMT -7. The time now is 03:27 AM.

Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
2006/10 Forno Bravo, LLC