new build in werribee

[oasiscdm]

Re: new build in werribee

Hi Colin
I copied this from Harriotts build thread so we don't hijack his build.


Anthony

my confusion was around the refractory mortar and HE cement. Is the Refractory mortar actually fire clay? because in the description of your mix there was no fire clay just 2 lots of cement.

I thought about mortaring the floor in place but having spoken to a number of forno experts went the floating route as most others have. Be interested how yours goes over time.

Colin
Not sure of composition of refactory mortar (grey in colour), it was supplied with kit and homebrew mortar is Ben's recipe. The HE cement is a off white portland cement I have been using for my stand brickwork, it is finer ground and hydrates quicker to give a (H) High (E) Early strength.
I keep you posted on floor movements.

Anthony [Liteceeper]

Found this in my emails when talking with Ben "
The refractory mortar that we sell is what’s called ‘Airset Refractory Mortar’, it is a combination of powdered fireclay and sodium silicate, designed for use in furnaces and kilns. As such we don’t use it by itself, we combine it with GP cement, lime and fine washed sand in a similar mixture to that used by Forno Bravo – we use different ratios after significant experimentation. The alternative to this would be using our refractory castable as mortar, which you can quite easily do as the castable we sell has a very fine grain structure which allows for tight mortar joints. "

Gulf

If your out there and see this I need to build big draws would love to know more about the construction of yours.

[oasiscdm]

Re: new build in werribee

And guess what --------- I RAN OUT.... 1 bag short.

Guess I'll be seeing you again Mark.......

I did the same at the top as Liteceeper 2 short pieces of 40mm pipe except I just sat them there moving them around as required,, worked ok.

Fired up the curing device and am finding the Hebel panel to be a great temp door, 65c on inside and ambient temperature 14c on the outside seems to be a great insulator might make a temp door from it and follow cobblerdave lead.

Will crank up the curing temps tomorrow, getting it too 150 ish then 200 ish Friday. Shiralite should dry quick as it is next to the dome. I shouldn't have the water issues doing it this way - as others have reported - at all. I'm guessing the curing will go more quickly. Will put plastic on, on Friday night to check for condensation.

Weekend get the blanket on 4 layers of 25mm, then crank it up.

Make a temp door, maybe some tools. Keep it fired throughout next week, Then some wood fires and maybe Pizza by end of next week or earlier if there is no water before that.

[oasiscdm]

Re: new build in werribee

Got some more Shiralite on this afternoon having got some from the supplier.

[oasiscdm]

Re: new build in werribee

Also finished the top half of the keystone and fixed it to oven. SO dome complete was just sick of cutting bricks 2 weeks ago so left it.

Damn ran out of Shiralite.

[oasiscdm]

Re: new build in werribee

Weekend work photo's part 2. and curing device.] and quick paella device.

[oasiscdm]

Re: new build in werribee

Ok weekend work photo's. Began the shiralite laying 40mm using Liteceeper's method. Works a treat......

[Liteceeper]

Re: new build in werribee

Hi Colin
I copied this from Harriotts build thread so we don't hijack his build.


Anthony

my confusion was around the refractory mortar and HE cement. Is the Refractory mortar actually fire clay? because in the description of your mix there was no fire clay just 2 lots of cement.

I thought about mortaring the floor in place but having spoken to a number of forno experts went the floating route as most others have. Be interested how yours goes over time.

Colin
Not sure of composition of refactory mortar (grey in colour), it was supplied with kit and homebrew mortar is Ben's recipe. The HE cement is a off white portland cement I have been using for my stand brickwork, it is finer ground and hydrates quicker to give a (H) High (E) Early strength.
I keep you posted on floor movements.

[david s]

Re: new build in werribee

Test it with the plastic sheet.

[oasiscdm]

Re: new build in werribee

Can we assume its dry, walls are 115mm thick.
Just wanting an idea

[david s]

Re: new build in werribee

How much wood does it take to clear the dome?

Colin,
that all depends on how dry your oven is and how much mass is in your walls and floor. At an estimate it takes about three times more wood to get there if the oven is wet.

[oasiscdm]

Re: new build in werribee

HI all

I have only half the shiralite on the dome.

Fired up the curing device tonight 5 hours with centre and ring 3 going inside surface temps around 100c on the walls top middle and bottom, sides and back, top of dome is 165c.

Thought I would take readings on the outside of dome above the shiralite temps around 58c and the outside of the shiralite just below [180mm] dome bricks was 24c shiralite on the landing arch and at the bottom of the dome near the hearth at ambient temp of 16c.

Found the readings interesting. Shut curing device down put some Hebel in front of the door. about an hour or so later temps throughout very similar. Will do this each night this week while I complete the Shiralite and then once shiralite layer completed [thursday] will crank it up a little to get rid of the water hopefully for 2 nights at least at a higher temp.

This weekend will get the blanket on, will then crank the curing device up while doing this running device for most of the weekend.

Thinking I will give it 10 days of solid curing this way. Not going to use the Heat Beads now the curing device provides plenty of options and appears will get temps right up there. Will actually be interested in how hot the curing device can get the oven with all 4 rings going.

Will start with fires middle of next week depending on above, time and condensation with the plastic. Arrrghhhhhh going away weekend before Xmas so time is of the essence.

How much wood does it take to clear the dome?

[Liteceeper]

Re: new build in werribee

Cheers Colin
Will PM email

[oasiscdm]

Re: new build in werribee

Thanks Liteceeper.

Sorry to hear about hearth slab crack, I find it interesting that the slab can crack with insulation on top, but guessing if calsil is wet the water would boil, over heating the slab. I think crocau had same problem. I actually did a test with a calsil offcut and soaked it in water over night it sucked water like a sponge and just letting it air dry took about a week. I weighed it before on kitchen scales. So I guess that's why they say cure long and slow.

My hearth slab is hebel so I have 50 mm calsil plus 75mm Hebel panel, do I'm guessing water has somewhere to go as hebel is an insulator also.

Mine has Been a long build and lots of questions so I guess that's why is long also wanted to document with lots of photos as I find some threads lacking.

See page 8 post 74.

PM me your email address.Liteceeper. I went out last week and got some photos of other options, from the same place.

[Liteceeper]

Re: new build in werribee

Thanks again Liteceeper

I'm using a stone granite coat when finishing mine. I think I posted a picture somewhere on my thread, they now have new options.

Interested to see the granite coating any info , website, page # ? Your thread is so so long.

[Liteceeper]

Re: new build in werribee

Hi Colin
great to hear the conduit idea is helping, nice to give back on the forum.

With the curing I agree with david s & brissie long & slow, although my oven had a long drying period the render on the CF did not and I have a few cracks around flue area in render, the oven itself is great. What I didn't expect was the slab under the calcium silicate board (50mm) cracked at first big clearing fire.
I was enjoying the crackle and pop of the wood when heard a deeper thud and thought that didnt sound good. Looked around oven brickwork and that looked fine, then noticed two fine cracks in slab from centre to sides and 90 degree to each other.
So I would do a couple more big fires (not to clearing stage) in hind sight to try drive more moisture from calsil board.
That said the cracks are very small and four big firings later no futher movement so things are settling.