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  #31  
Old 10-28-2013, 12:14 AM
mnl mnl is offline
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Default 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?
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  #32  
Old 10-28-2013, 12:21 AM
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Default Re: Alan Scott oven in sydney

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Originally Posted by mnl View Post
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.
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  #33  
Old 11-01-2013, 10:07 PM
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Default 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.



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  #34  
Old 11-02-2013, 02:38 PM
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Default 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?
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  #35  
Old 11-02-2013, 03:43 PM
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Default Re: Alan Scott oven in sydney

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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?
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  #36  
Old 11-02-2013, 03:51 PM
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Default 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.
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  #37  
Old 11-02-2013, 03:53 PM
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Default Re: Alan Scott oven in sydney

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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.
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  #38  
Old 11-02-2013, 05:03 PM
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Default 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
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  #39  
Old 11-02-2013, 05:56 PM
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Default Re: Alan Scott oven in sydney

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Originally Posted by cobblerdave View Post
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.
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  #40  
Old 11-07-2013, 08:01 PM
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Default 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.







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