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  #31  
Old 10-18-2012, 05:08 AM
Laborer
 
Join Date: Jul 2012
Location: Brisbane Australia
Posts: 60
Default Re: Camo's new 36" build Brisbane

Thanks for the great advice Dave- Yes I am chaffing at the bit to get going but have been working on the "indespensibe tool" and cutting a bit of ply to protect the fire bricks on the floor Got these pieces for the "indespensibe tool" from the local hardware store for about $14 and think they will do the job. Just have to get an angle iron piece welded on the end. Works out the height of the dome will be approx 485mm instead of 450 but I think I can shorten it in a bit as I get to the top of the dome.
Anyway slowly slowly, should start to cut the floor this weekend and then if time, lay a few bricks. Should be interesting as this is the first time at bricklaying although I've layed a few slabs in my time.
Cheers
Camo
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  #32  
Old 10-23-2012, 01:58 PM
Laborer
 
Join Date: Jul 2012
Location: Brisbane Australia
Posts: 60
Default Re: Camo's new 36" build Brisbane

Mortor or Float the oven floor ?

Guys just started laying and cutting the oven floor but can't seem to get a flat surface even on top of the CF board. In some places I have a lip of 2mm which I think will catch the peel.
Should I mortor the floor in and what type of mortor would it be. I thought maybe fireclay and water or should I just grind the lips off later.
If I leave the floor to float then I will be able to change (maybe) bricks in the future if the crack or become damaged >>

Any thoughts
Cheers

Camo
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  #33  
Old 10-23-2012, 02:29 PM
cobblerdave's Avatar
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Join Date: Jan 2010
Location: brisbane australia
Posts: 2,479
Default Re: Camo's new 36" build Brisbane

Gudday Camo
Put down a slurry of fireclay and water.Smooth it out roughly then use a notched trowl like you use for tiling (with large notchs). you can get a cheap plastic one use one for a couple of $.
Once you have smoothed the slurry out with the trowel start laying. Next brick up to the first so they touch first then lower into position and a tap with a trowel to set it level with the first. Dont lower first then push them together the slurry packs up & makes gapes between the bricks and ruins the level.
No need to mortar them down let them float, expand and contract, ash packs in the cracks etc if you mortar you make it stiff and it will probably crack during use. Mines level 2 years on now.
Have only heard of one with ruined hearth bricks as he used mineral coal and it was to hot so dont worry about that. Its good still to know its possible to replace if the slim chance it does happen.
How did you go with the IT if you still need he angle welded on give a a PM I have a welder


Regards Dave
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  #34  
Old 10-23-2012, 05:31 PM
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Join Date: Apr 2012
Location: GREENHILL SOUTH AUSTRALIA
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Default Re: Camo's new 36" build Brisbane

Hi Camo,

I had similar issues with my floor, I was laying on a vermiculite layer. I found that the fireclay mix recommended to lay on, given the warm weather and vermiculite absorption of water, was drying too quick which made the brick laying problematic.

I ended up laying a thin layer of sand with fireclay, getting it level, laying the bricks level (as suggested by Dave) and then lightly water over top, which ran between the bricks setting the clay.

I have not had any problems so far, and after curing and three major cookoffs, floor still level.

Cheers

Craig
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  #35  
Old 10-24-2012, 02:54 AM
Laborer
 
Join Date: Jul 2012
Location: Brisbane Australia
Posts: 60
Default Re: Camo's new 36" build Brisbane

Cheers guys, don't know how I would go without this site. I wasn't quite sure whether to sit them on the fireclay. I had seen this method on Karangi Dude's build as well aqs others so should have taken this as gospel - his build is fantastic
Anyway if there are any lips after this I'll just grind them back

Should get the floor bedded down this week end I hope

Cheers

Camo
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  #36  
Old 10-24-2012, 04:23 AM
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Thumbs up Re: Camo's new 36" build Brisbane

Gudday Craig
Thanks Craig Camos going to facing heat and dry winds this wkend
Talking about dry how did you find laying firebricks did you find it sucked your mortar dry? And how did you get around it?

Regards Dave
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  #37  
Old 10-24-2012, 05:11 PM
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Default Re: Camo's new 36" build Brisbane

Hi Dave,

As I started laying bricks in the heat and finished in the cold, the chemical reaction of the mortar was always dictating how to work.

I followed forum suggestions by mixing small quantaties of poormans mortar in a bucket with a paint stirrer on a drill. I used a large tin as measuring device ( 800+gm tin size, red kidney bean to give it a mexican feel, hee hee), this worked out to give a consistent mix and was quick. This was sufficient mortar for say 10 -12 bricks on lower courses, and probably 6 or so in higher courses as the angles increased. I did not shape the brick top or bottom.

I placed 8 to 10 half bricks in a large oversize bucket of water to soak whilst I mixed the mortar. The bricks soaked up enough water to not be too wet and not rip the moisture from the mortar, nor make the mortar too wet when placing the brick. I also lightly wet down the previous courses to enable them to be a bit wet too.

I found this enabled me to lay fire bricks quickly and efficiently. Some days I just had to accept it was too hot or too cold to be laying bricks, and just drank beer instead!!

Cheers

Craig
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  #38  
Old 10-26-2012, 06:13 PM
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Lightbulb Re: Camo's new 36" build Brisbane

Gudday
Finally remembered what I did to stop the water from getting sucked out of the slurry by the insulation! Margarine !!! Yep ordinary old table spread a thin layer on the insulation ....you then get an instant bio degradable waterproof layer. Sorry cam I remembered this do late ....perhaps it will help someone else

Regards dave
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  #39  
Old 10-26-2012, 06:36 PM
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Join Date: Nov 2010
Location: Japan
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Default Re: Camo's new 36" build Brisbane

Gudday,

You have me laughing my @&& off! How in the devil, did you come up with THAT??
It make me think of the old Reece's Peanut Butter Cup, commercial of the two kids that run into each others, one eating a chocolate bar and the other peanut butter. This I need to hear?
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  #40  
Old 10-26-2012, 06:48 PM
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Default Re: Camo's new 36" build Brisbane

Quote:
Originally Posted by cobblerdave View Post
Gudday
Finally remembered what I did to stop the water from getting sucked out of the slurry by the insulation! Margarine !!! Yep ordinary old table spread a thin layer on the insulation ....you then get an instant bio degradable waterproof layer. Sorry cam I remembered this do late ....perhaps it will help someone else

Regards dave
You can also just use a dry mix 50/50 sand, fireclay and apply it dry over the insulation. That way there is no need to worry about it drying up solidly too quickly.
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