web analytics
How much vermiculite do I need - Forno Bravo Forum: The Wood-Fired Oven Community

Announcement

Collapse

Photo Galleries are back! Instructions below.

Dear forum users,
Thank you for your patience with the Photo galleries. We've got your galleries online!
We have finished writing a custom script to migrate the PhotoPlog to vBulletin5’s albums.

Unfortunately V-Bulletin killed the "Photoplogs" in their software upgrade which was unforeseen and we're the first development group to have written a script for getting the galleries back... that said, it took some time to reverse engineer the code and get the albums to move over seamlessly!

Forum users will be able to access their “PhotoPlog” images through their user profile page by clicking on the “Media” tab.
They will also be able to browse other albums by going to the albums page. (On the forum site, there is a link in the black bar beside “Forums” to the albums.)

In order for users to create an album please follow the steps below.
1) Go to user profile page and click “Media”
2) Click Add Photos
3) Enter Photo Gallery Title in the first field
4) Click Upload or Select from Photo Album to add photos
5) Click Post
6) Once posted, the album will be created as a “Topic” on the albums page for the public to see. The topic title will be the “Photo Gallery Title” they created before uploading their photos.


To create this migration path we used vBulletin5’s default album structure. Unfortunately, it won’t work like the “PhotoPlog” but is an album/gallery component on the forum now.
See more
See less

How much vermiculite do I need

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

  • How much vermiculite do I need

    I am about to pour the insulation layer for my firebrick to sit on and plan on using the 5 to 1 ratio of vermiculite and portland cement. I will filling an area of about 52 by 52 inches and 5 inches deep.

    How much vermiculite should I buy? I only want to make one trip to the store.

    thanks

  • #2
    Re: How much vermiculite do I need

    Based on your measurements, I come up with about 10 cubic feet of Vermiculite. I didn't figure in the volume of portland because it's pretty insignificant.

    Buy an extra bag. You don't want to be in the middle of mixing and run out. You can save it for insulating the dome or return it to the store. As you build your oven you'll find yourself making a LOT of extra trips to the store
    Ken H. - Kentucky
    42" Pompeii

    Pompeii Oven Construction Video Updated!

    Oven Thread ... Enclosure Thread
    Cost Spreadsheet ... Picasa Web Album

    Comment


    • #3
      Re: How much vermiculite do I need

      It tends to "shrink" or compress a bit when you put it in or if you mix it too aggressively. (You want to mix gently, folding the cement in, to keep the "loft") So as Ken says, get some extra. Two bags.

      Comment


      • #4
        Re: How much vermiculite do I need

        I used perlite and had about 30% compaction.
        So with your 52x52x5, you have 7.8 cu ft.
        If I were you I'd plan for 12 cu. ft - that allows for up to 40% compaction.
        3 bags of vermiculite and 3 bags portland cement.
        Jeff
        Jeff
        My 42-inch build

        Comment


        • #5
          Re: How much vermiculite do I need

          Thanks for all the help. I went ahead and bought 6, 4 cuft. bags of medium vermiculite and 2, 92 pound bags of portland. I found the vermiculite cheap for $17.00 a bag and did not want to drive the 50 miles for it more than once. Ken was right and I can use the extra for insulating the dome. I'm sure that will take a lot.

          I used up a little more than 2 bags of the vermiculite and a little more than a whole bag of the portland cement. Me and the wife mixed it in a wheel barrow and I shoveled it into the hearth. I screeded it off and had to cover it to keep the cats out of it. I'm sure they would love to make that a liter box.

          Will this stuff take about a week to dry and cure before I can lay my firebrick and start my dome?

          Tap

          Comment


          • #6
            Re: How much vermiculite do I need

            "Will this stuff take about a week to dry and cure before I can lay my firebrick and start my dome?"

            It doesn't "dry", it cures. Like any portland cement based material, it must be kept well supplied with moisture for at least 7 days for it to obtain strength. That said, it will have enough compressive strength to continue your build as early as the next day. Lay your firebricks and start your dome. Just be a little gentle with it while it is still "green".

            Comment


            • #7
              Re: How much vermiculite do I need

              Originally posted by Neil2 View Post
              "Will this stuff take about a week to dry and cure before I can lay my firebrick and start my dome?"

              It doesn't "dry", it cures. Like any portland cement based material, it must be kept well supplied with moisture for at least 7 days for it to obtain strength. That said, it will have enough compressive strength to continue your build as early as the next day. Lay your firebricks and start your dome. Just be a little gentle with it while it is still "green".
              One other item. Keep your forms in place for a couple of weeks if you start the build right away. This will keep the material protected from chipping away until it reaches full strength.

              Chip
              Chip

              Comment


              • #8
                Re: How much vermiculite do I need

                Good point Chip.

                Comment

                Working...
                X