Announcement

Collapse
No announcement yet.

pompeii oven construction began today

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

  • #16
    Keep the photos coming

    Paul,

    Nice looking work, and keep the photos coming. The more the better.

    I always try to shoot for a balance on overbuilding with forms and things you don't see. It's like laying a straight line with wood floor under the baseboard. You'll know how great the work is, but no one else will!

    James
    Pizza Ovens
    Outdoor Fireplaces

    Comment


    • #17
      i agree, i just want to be sure that the bottom form will be structurally sound enough to hold up so much weight before the concrete sets enough to hold itself up.

      -paul
      -Paul
      overdo it or don't do it at all!

      My 2005 pompeii build

      Comment


      • #18
        In a heartbeat.

        I took a level to the underside of mine after it had cured & I pulled the form and it was dead level in both directions. Never moved a whisker.

        Comment


        • #19
          great, thanks! now i can frame the top form in and get ready for the pour.
          if only it would stop raining. damn you, pacific NW!
          -Paul
          overdo it or don't do it at all!

          My 2005 pompeii build

          Comment


          • #20
            how much portland cement is needed for the insulating layer?

            the math for the thermal layer using 90# sacks of quickcrete is easy, but i'm trying to get an estimate of how much portland cement i'll need for the 2" vermiculite mix layer. did anybody keep track?

            -paul
            -Paul
            overdo it or don't do it at all!

            My 2005 pompeii build

            Comment


            • #21
              Here's the post I did on the same subject on the brick-oven Yahoo group (for someone building an Alan Scott version but it works for the Pompeii too):

              It's dependent on your specific installation -- hanging hearth, not
              hanging, more custom stands (like fieldstone, etc.) change the size of
              an individual installation. But, it's easy enough to calculate. Take
              the width multiplied by the length of your forms (inner dimension),
              multiply that by the height in those forms you're using for your
              insulating hearth (e.g. forms are 2x6 which are really 5 1/2" tall but
              you're going to have a 3" insulating layer & a 2 1/2" hearth layer --
              you'd use 3" for the height). Convert to cubic feet & round up. That's
              the total cu ft of the slab. Divide by 7 for the number of bags of
              Portland and the rest is vermiculite or perlite.

              Example:
              Hearth slab of 6'x7' with a 3" insulating layer

              Calculation is: 72" x 84" x 3" = 18,144 cu in
              Divide by 1728 cu in per cu ft = 10.5 cu ft
              Round to 11 cu ft (insulating hearth volume)

              Divide by 7 (1/7th of the slab is Portland) = 1.6 cu ft of Portland or
              1.6 94lb bags of Portland
              Multiply this by 6 (6/7ths is vermiculite) = 9.6 cu ft of vermiculite
              or 3 bags of vermiculite in 4 cu ft bags

              So, you'd buy
              2 94lb bags Portland
              3 4 cu ft bags Vermiculite (or Perlite)

              You'll have some of both left over. The extra Portland can be used for
              the brick mortar when you build the dome and the extra vermiculite can
              be used for insulating the dome. Adjust the calculations for your
              specific hearth size.

              Jim

              Comment


              • #22
                thanks, jim!

                okay, now that you posted that, i feel really lazy, like i was trying to cheat my way out of a 6th grade math test. thanks anyway.

                here's today's labor:
                note that i am creating a 3 1/2 inch overhang on the front (though this may be almost negligable when i veneer the wall underneath it...in any case, it gives me a bit more hearth space, where i couldn't quite afford it in the footprint.)
                also note that, despite the foundation and first course of cinderblocks being level, somehow it didn't end up that way by the time i reached the top of the block stand. i decided it would be easier to fix with the top forms for the hearth, rather than adding mortar in the block stand to make the top course level, so that's what i did. i filled the large gaps between the block stand with duct tape. the exposed tape will never be seen, as the back three sides of the hearth will be covered by the veneer walls in the end. i caulked the crack on the front side, as this will possibly be the only place you will actually see the edges of the hearth, so i wanted the bottom edge to be smooth.
                -paul




                -Paul
                overdo it or don't do it at all!

                My 2005 pompeii build

                Comment


                • #23
                  LOL! No cheating.

                  Bob (I think) did a cantilevered design with his hearth so the 3 1/2" overhang you've got going should work very well. No issues about the leveling of the block walls - just get the top of the hearth forms level and the hearth will be spot on.

                  Jim

                  Comment


                  • #24
                    woohooo!

                    the insulating perlite concrete layer...

                    and the thermal/structural concrete layer.

                    i sprinkled in a red concrete dye before the final trowel, just in case i end up not tiling the front shelf. i had it laying around anyway.
                    by the way, i used steel wire ties between each 2 x 6 and it's opposite to keep the forms from pushing outward with the weight of the concrete and it worked perfectly. the corners are just screwed together. oh yeah, and i staked 2x4's underneath the top form all the way around so that the form would sit flush with the edge of the block stand.
                    Last edited by paulages; 06-30-2005, 12:36 AM.
                    -Paul
                    overdo it or don't do it at all!

                    My 2005 pompeii build

                    Comment


                    • #25
                      hearth with stain

                      (and bird poop!!!!)
                      damn robins.
                      -Paul
                      overdo it or don't do it at all!

                      My 2005 pompeii build

                      Comment


                      • #26
                        Everything to excess. Moderation is for monks.

                        Comment


                        • #27
                          except for the belgian monks...

                          who make great beer.
                          -Paul
                          overdo it or don't do it at all!

                          My 2005 pompeii build

                          Comment


                          • #28
                            Paul,
                            It looks as though you're off to a grat start! Now the fun stuff begins.
                            Good work!

                            Bob C.
                            Great pizza, a cold beer,a great cigar and great friends...my idea of a great time

                            Comment


                            • #29
                              thanks bob,

                              yeah, i'm trying to round up some firebricks today, so i can work on this over the weekend. otherwise i'll have to wait until tuesday. i'm thinking of incorporating a BBQ into the design, just because it seems like there will be a lot of wasted space, even with a 42" interior.
                              -Paul
                              overdo it or don't do it at all!

                              My 2005 pompeii build

                              Comment


                              • #30
                                firebrick types

                                i've been unable to find a low duty firebrick here in portland. the closest i've been able to find is a medium duty made by carter (info found@ hwr.com, under the product datasheets). they are $1.50 a pop. other than what's listed in the firebrick primer, anybody have any advice? i'll keep looking, but wonder whether i should settle for the medium duty at that price...
                                -Paul
                                overdo it or don't do it at all!

                                My 2005 pompeii build

                                Comment

                                Working...
                                X