web analytics
perlite - Forno Bravo Forum: The Wood-Fired Oven Community

Announcement

Collapse

I'm Peter Reinhart! Ask Me Anything! Monday, February 15, 2016 7:00-8:00 pm EST

To kick off our AMA feature, we have invited author, chef and master bread maker and host of Pizza Quest, Peter Reinhart, to be our first host! Peter will be in the Forum on Monday, February 15th, from 7:00 - 8:00 pm EST. If you are unable to be online during the live session, you can post your questions in the sticky post. Peter will answer those questions during the live session on February 15th. You can view Peter's answers to your questions as well as what happened during the live session in the session thread.

Ask Me Anything New Forum Feature

You will notice a new forum at the top of the main page called, "Ask Me Anything". This forum will be used for live one hour "Ask Me Anything" (AMA) sessions hosted by people who are knowledgeable in different areas pertaining to wood fired ovens. How it works:
- Each AMA will have a "sticky" thread where the community can post questions they would like answered during the live session. This will allow everyone to participate even if you can't be online for the live session. These questions will not be answered by the host until the live AMA; if you need an answer quickly, you should post it in the appropriate Forum area for the community to respond.
- Another thread will be posted for the live AMA. Registered users who are logged in during the live session can interact with the host by asking questions and receiving responses.
- The live thread will remain in the AMA forum to view after the session.

We hope you enjoy this new feature! Please let us know if there is a topic that you'd like to have as an AMA and we'll look for a host!

Forno Bravo
See more
See less

perlite

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • perlite

    I have managed to get c400 grade perlite to mix with my cement for my ovens first insulation coat over the dome, does any one know if c400 is ok and if so do I use at a 6:1 ratio, or is it too fine. thanks Ugo

  • #2
    Re: perlite

    Sorry, I don't know what C400 is but the ratio for perlcrete over the dome is usually leaner than 5:1. The more cement you put in the brew, the less insulating it will be. I use 10:1 which is enough for it to be still workable.Some folk go even leaner. Also I find a half perlite half vermiculite makes up a more workable mix than either of them alone for some reason. For every 10 parts you will need about 3 parts water.It's thirsty stuff
    Kindled with zeal and fired with passion.

    Comment


    • #3
      Re: perlite

      thanks for that, will give it a go and see how I get on. Would you advise just 1 coat or more I have a 100 ltr bag of it so have lots I can use.

      Comment


      • #4
        Re: perlite

        Originally posted by gaetanin View Post
        thanks for that, will give it a go and see how I get on. Would you advise just 1 coat or more I have a 100 ltr bag of it so have lots I can use.
        you don't say how big your oven is, or whether you are relying on perlite as your only insulation material. Are you using a CF blanket under the perlite too?
        4/3 x pi x r x r x r = volume of a sphere. Work out outside volume and subtract inside volume then divide by two because it's a hemisphere. Also add 20% because perlite volume will be reduced on mixing with cement and water.I like to do the layer about an inch and a half thick, then let it dry for a week before adding the next layer and so on. This way you can eliminate the water more easily later.
        Last edited by david s; 08-02-2013, 10:51 PM.
        Kindled with zeal and fired with passion.

        Comment


        • #5
          Re: perlite

          I am building a 36in interior dia oven and trying to keep within the forno bravo instructions as much as possible, that's not been as simple as you would think as some of the materials are difficult to come by and can also be quite expensive here in NZ so far I have spent way more than ever intented. Yes I will be using a blanket thank you for your help I will reassess my notes before I progress any further.

          Comment

          Working...
          X