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What type of mortar do you use to put the dome together.
There are three main choices in the states:
1. Forno Bravo's mortar
2. Heat Stop 50 (DRY 50lbs bags usually stocked or ordered from a brick store)
3. Make your own (recipe in the PDF Pompeii Plans).
I may have missed some other options but these are the 3 most widely used products. Judging feedback from other posts, the FB mortar or HeatStop seem to be the easiest to use.
I used a homebrew of sand, portland cement and fireclay. Those 3 products were readily available at a local brickyard. the ratio mix was 6:2:1. It made a really sticky mortar and I found it really easy to work with (of course this is the first time I have ever worked with any mortar so I have no frame of reference. I must admit, I'm not sure how well it will stand up to the heat- haven't got my oven about 600F yet. But so far so good.
Daniel,
you can spend heaps on refractory mortar of decide to use a cheaper alternative.
I used a poor mans mortar and have used the oven for a year with temps regularly over 500˚C with no cracks or problems.
the mix is as my posting on the oven build at:
I wrote then,
"Mixing the poor man?s mortar was an experience. 3 parts sand, 1 hydrated lime, 1 fireclay and 1 portland cement, was sticky and quite difficult to mix in the wheel barrow. I couldn?t be bothered using the mixer as I was only mixing enough to put in the base layer of soldier bricks and the bricks holding the steel arch oven frame. Three rows later, I had used it all up. Great to work with as it is exceptionally sticky and really grabs onto the bricks, very handy when working on chains 3 and over with very sloping bricks.
I will use this mix again on the next 2 ovens that I willbe involved with as I know it works.
Neill
Prevention is better than cure, - do it right the first time!
The more I learn, the more I realise how little I know
I used Neill's (same as FB's) formula - Breven, 6,2,1 of what? I would like to mix it up just for fun. Daniel, buy one of the long beaters at Lowe's or HD - mix it up in a bucket with a drill, save your back!
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