Alan Scott oven in sydney

[mnl]

Re: Alan Scott oven in sydney

Fair point. Guess you are saying just put the insulation on top and given the weight is spread over a reasonable area it will be ok?

[brickie in oz]

Re: Alan Scott oven in sydney

Fair point. Guess you are saying just put the insulation on top and given the weight is spread over a reasonable area it will be ok?

You can start building the oven within 1 day after the slab is poured.

I have seen carpenters start the frame 1 day after a pour, not something I would recommend as there is no strength in the concrete to hold the fasteners.

[chubbybones]

Re: Alan Scott oven in sydney

Its been a few days but got some materials now and so today i did a mockup to see how things will look.
Laid a course of bricks on the outer edge to hold the insulation bricks in.
Thanks once again to Karangi dude for putting me onto these.Quite cheap also.

I did a quick layout out of the oven,allowing 125mm of insulation where needed all around.Set out where the 3 respective arches will go.Didnt really know where to stop with the insulation bricks at the front but i think i will end them with the inner arch and same with the hearth bricks.Also i intend on putting some sort of membrane between the hearth slab and insulation bricks,maybe foil or a plastic layer.

The hearth floor put at 45 degres means i will have very small cuts on 2 sides.
Hopefully building the oven walls on these edges won't pose any problems.

[david s]

Re: Alan Scott oven in sydney

Wow, that is a lot of thermal mass in the floor, or are those insulating firebricks between the supporting slab and the floor bricks?

[Polo]

Re: Alan Scott oven in sydney

Wow, that is a lot of thermal mass in the floor, or are those insulating firebricks between the supporting slab and the floor bricks?

I am interested in those brick as well. They are apparently insulating brick, but I have never seen that type before. How much do they weigh?

[chubbybones]

Re: Alan Scott oven in sydney

Hi David,
Yep, those are the insulating bricks.They are actually seconds which came out of the boral refractory but in very good condition & @ $2 a pop.They are 230x170x75.
Karangi dude was the one who put me onto them.

[chubbybones]

Re: Alan Scott oven in sydney

I am interested in those brick as well. They are apparently insulating brick, but I have never seen that type before. How much do they weigh?

Hi Polo,
If I was to take a guess,around a kilogram?,
possibly less.

[cobblerdave]

Re: Alan Scott oven in sydney

Gudday
You could eliminate those little cuts on the sides by moving the bricks over to one side by 1/2 a brick.
Noticed your entrance is deep. It's just about the same as mine I find it usable, for a dome. You could make it wider and higher otherwise that back wall is going to appear a long way from the front.
Hope something here helps
Regards dave

[chubbybones]

Re: Alan Scott oven in sydney

Gudday
You could eliminate those little cuts on the sides by moving the bricks over to one side by 1/2 a brick.
Noticed your entrance is deep. It's just about the same as mine I find it usable, for a dome. You could make it wider and higher otherwise that back wall is going to appear a long way from the front.
Hope something here helps
Regards dave

Good point,thanks dave.

[chubbybones]

Re: Alan Scott oven in sydney

Well progress has been a bit slow,trying to get as much done as possible between work-related activities.

-Insulation bricks sit on a couple of layers of aluminium foil.

-Hearth bricks over that in a herringbone pattern sitting on a mix of fireclay & sand for levelling.I gave all hearth bricks a slight chamfering as well.

-Started the sidewalls and back wall of the oven,ready for the dome.

-Blockwork done to its final height level.This will act as a buttress for the vermi-mix sittting in the void.

Next step will be to make the vermi- mix (6:1) and pack it to the level of the oven walls before starting the actual dome.
Anyone recommend a bit of reo for the vermi mix? I have around 120mm of it going in on the sides and back.
I'll keep you guys updated,
Cheers,John.

[Crawfish fest]

Re: Alan Scott oven in sydney

Looking good!!

[brissie]

Re: Alan Scott oven in sydney

Looking good!!

+1 The reduced mass, and insulation gap are looking good.

[cobblerdave]

Re: Alan Scott oven in sydney

Gudday
That looking real good!
I wouldn't use steel in your insulation layer. It will only attract and transfer heat There a good chance once heated it will expand and crack the insulation as well.
If it can hold up the weight of an oven it will certainly do the task on those side walls I'm sure.
Regards Dave

[chubbybones]

Re: Alan Scott oven in sydney

Thanks guys.Hopefully i can get some more work in before it starts raining here in sydney.Rain is expected for a week

[mnl]

Re: Alan Scott oven in sydney

Looks good. Wish I could get that much done between work commitments!

Is the plan to just put the vermimix between the blocks and the bricks to serve as a buttress? Are you planning any other insulation or is that enough?