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just thought i might get more feedback in this thread than commercial ovens ? as some one who never laid a brick much less cut tapperd ones i just want to get as much feedback as i go along so as not to end up having to un do anything mind the premix i got from kiln linings doesent seem to set at all after 5 days you can just pull a little and the arch came out and the bricks are growing a white fur ??
not quite like a pool but there is a high lime scale in the water ..does that mean if i do carry on and build carefully it will all set hard after a firing ?? or mayby get the heat gun out to semi set ?
this is the blurb from the site i got it from i was thinking as there is no heat in the room mayby thats affecting it ?? and mayby my bricks ,sometimes being soaked overnight is causing the bricks not to set .. some seem fine others are not ??? KilnLInings Wet Air Setting Cement, this product is for jointing any of the bricks we supply, we suggest 1 tub/75 bricks. Though this depends how sparingly the product is used. The cement can withstand service temperatures up to 1600C. Material safety data sheets are available on request as too are Technical data sheets. Please be aware this product is an "irritant". Our KLW A.S.C cement comes in a 25Kg Tub.
ill say had to compleatly redo the entire archs and try a hot air gun in the next couple of days when it gets here and had a big set back as i got a new blade but on 20 m not 22.2 so bored it out a little and it must be a little out as when you put the brick up to it all you get is wobble wobble doh
Hi there I used the same "air setting cement" from kiln linings and it worked fine. Dryed pretty quick as well, I did build mine in the middle of summer though, maybe the damp winter air is not helping. I maybe wrong though.
Initially I bought 3 25kg tubs of airset cement. It was rather expensive and if you look at the FB recommendations on some sticky or other they are very specific that you should not use airset cement. I rang the manufacturers and questioned them about it. They said it wasn't suitable for joints >3mm (I think). That decided me since my joints are tapered from up to an inch to zero. I returned them all unopened and they refunded me. I decided to go for what is usually referred to as "homebrew" on this forum i.e 3 sand 1 portland: 1 lime : 1 fireclay: and I have almost finished building the dome with that. It is much much cheaper.
I think you said your arch was exposed to rain? I think airset is not meant to be used outdoors. You might get away with it if it is kept covered - but I recommend you change it for the homebrew or a dry premix (add water).