#1  
Old 10-01-2013, 07:25 AM
Serf
 
Join Date: Oct 2013
Location: UK
Posts: 12
Default UK oven build - help with fire cement

Hey

A brilliant forum, currently building my first Pompeii oven.

Can you help with the fire cement? I purchased Vitcas Fire Cement, but now have three tubs and am unsure if this is the correct product for the job? It is more like tile adhesive / putty, and I am just not sure if it is going to do the job.

What else could I use? I only really have three options;

I have this: Vitcas Premium Fire Cement

But could have got one of these:

Vitcas Heatproof Mortar

Refractory Morset

Should I trust the fire cement will go off eventually? Three days on and it's still quite soft and I cannot see the top roof bricks staying in, rather just drop out when I remove the ply.

Thanks for any advice :-)
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  #2  
Old 10-01-2013, 10:32 AM
jms jms is offline
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Join Date: Feb 2013
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Default Re: UK oven build - help with fire cement

I got similar stuff for my build. Its really not the best thing for pizza oven building. If you had enough time and patience then maybe it could work, but it would be far easier to make up some homebrew mortar (fine sand, cement, hydrated lime, dry fireclay). If you are using firebricks then a 3:1:1:1 mix is standard. Put your unopened firecement tubs on ebay/gumtree.
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Old 10-01-2013, 10:46 AM
Serf
 
Join Date: Oct 2013
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Default Re: UK oven build - help with fire cement

Thanks for that, I think I will.

Would the Refractory Morset be better? I could exchange what I have for that.

Thanks again
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Old 10-01-2013, 11:07 AM
jms jms is offline
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Default Re: UK oven build - help with fire cement

Generally none of the premixed wet mortars are very good for building a pizza oven. They are designed for things like fireplaces or kilns where they don't have wide mortar gaps or get much hotter than an oven would.
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Old 10-01-2013, 11:10 AM
Serf
 
Join Date: Oct 2013
Location: UK
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Default Re: UK oven build - help with fire cement

Problem is I am struggling with dry fireclay and lime locally.

Will builders merchants do it in a big bag?
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  #6  
Old 10-01-2013, 11:25 AM
jms jms is offline
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Default Re: UK oven build - help with fire cement

Hydrated Lime should be stocked at pretty much any builders merchants. It usually comes in 25kg bags but they are huge because it is very light. My local Jewsons had it. I used about 3/5 of a 25kg bag for my 32" oven.

Fireclay; 25KG Bag of Fire Clay to make Refractory Furnace Kiln | eBay Places like Jewsons can usually order it in on request too, or if you have a local kiln supply company they will probably have some.
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Old 10-01-2013, 11:26 AM
Serf
 
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Location: UK
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Default Re: UK oven build - help with fire cement

Fantastic. Thank you.
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  #8  
Old 10-01-2013, 11:35 AM
Serf
 
Join Date: Oct 2013
Location: UK
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Default Re: UK oven build - help with fire cement

This stuff is just up the road from me, is it the same thing?

http://item.mobileweb.ebay.co.uk/vie...d=271289055216
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Old 10-01-2013, 02:18 PM
cobblerdave's Avatar
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Location: brisbane australia
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Wink Re: UK oven build - help with fire cement

Gudday
The fireclay is just there to improve the workability of the mortar. It's not absolutely required
You could not use any at all a squit of dish washing liquid to make the mortar plastic
Use bricklayers sand which has a clay content.
Source bricklayers clay , bagged in powder form.
Use powdered clay from a pottery supply.


Regards dave
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  #10  
Old 10-01-2013, 02:26 PM
Serf
 
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Default Re: UK oven build - help with fire cement

Thanks Dave.

So I could use a mix of soft sand, lime and normal cement? I've got febmix for the workability....
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