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Post by Barry1 on Apr 7, 2014 19:12:34 GMT
Hi I will be starting my pompeii oven soon and I will be using home brew to build. it is there a particular formula that I should use ? Also what sand do I use,Sharp sand or building sand ? While I am here,What do people recommend ? building the dome on top of the hearth or cutting the hearth to fit the dome ? Many thanks Barry  |
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Post by spinal on Apr 8, 2014 16:20:44 GMT
It depends on whether you are going to use portland cement or HAC/CAC as your hydraulic binder. If HAC, I used 123 (1 part portland, 2 parts sand and 3 parts fine grog). If portland, no idea, but someone will be around soon to advise  |
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Post by tonyb on Apr 9, 2014 13:29:26 GMT
I used 1:1:1:3 cement:lime:fireclay:sand, I think I used builders sand but can't remember.
I built the dome on top of the firebrick hearth, which is probably quicker and easier, in the grand scheme of things I don't think it makes much difference.
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Post by cannyfradock on May 5, 2014 14:25:21 GMT
Barry
I've always built my first dome with a half...brick on edge, then laid the hearth inside of this. The outer spaces of the hearth bricks can be awkward cuts but I just use an angle grinder to cut then "near enough" then fill the outer edge with left over homebrew mix.
I found by using the 3:1:1:1 ratio sometimes the homebrew would crack slightly so now I use a 5:1:1:1 ratio of sand, normal opc cement, hydrated lime and powdered fire-clay. I also try to use coarse....but not gritty sand. In S.Wales out builders sad is "dredged sand" which always works well for me.
Terry
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Post by ninjafred on Jun 10, 2014 19:54:56 GMT
It depends on whether you are going to use portland cement or HAC/CAC as your hydraulic binder. If HAC, I used 123 (1 part portland, 2 parts sand and 3 parts fine grog). If portland, no idea, but someone will be around soon to advise I know this is very late to ask but I only saw your materials up for sale very recently but I was wondering if you were still up for selling them. In case you are please reply as I am very to buy a bit of grog and fire clay to create a crucible with those materials. How ever please notify me on the materials first. thanks. |
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