Looking really good UB, a really neat, professional job you're doing there! 

I'm not sure you'll have too much of a problem with the bricks cracking or exploding UB.  I'd rather anticipate possible cracking around the base of the terracotta pot and wherever you have changes in construction materials.

Needless to say, you'll no doubt fire it up slowly, in the first instance (to slowly drive out any moisture) and, thereafter, heat it up and cool it down gently 

Nice job, I look forward to seeing the completed and tested item! 

Quote from: Cory Ander on June 15, 2009, 07:48 AM
Looking really good UB, a really neat, professional job you're doing there! 

I'm not sure you'll have too much of a problem with the bricks cracking or exploding UB.  I'd rather anticipate possible cracking around the base of the terracotta pot and wherever you have changes in construction materials.

Needless to say, you'll no doubt fire it up slowly, in the first instance (to slowly drive out any moisture) and, thereafter, heat it up and cool it down gently 

Nice job, I look forward to seeing the completed and tested item! 

Thanks CA, i have to agree with you there, think Ive broke the back of it now just need to box it all in and insulate and in a way seems a shame  any how will keep you posted, Ta.

Place your bets folks! Will it crack, explode or what?

I still reckon you'd have been better off with a 'loose' build using no cement. As it is, I'd stand well back when you fire it up and thereafter. I've never seen bricks explode but I doubt if it's as serious as a boiler or something exploding. I think serious cracks could be the main threat, especially now that you've got a lamination comprising the clay pot, metal grid and cement. The metal will expand at a different rate and could even help the pot to crack. I would not have added a metal grid or anything at all to the outside of the pot myself. Loose Perlite or something would have been better.

If standard bricks and cement are fine for furnaces operating at around 400-500C, then they wouldn't bother to produce fire bricks and fire cement.

My bet - it might work to cook some food but it will crack.

Quote from: CurryOnRegardless on June 15, 2009, 03:32 PM
Hi UB

Have you checked this guys' site out?

http://piers.thompson.users.btopenworld.com/index.html

CoR

Hi CoR yeah have seen that site, hes done a nice job there wish i had the money to get a pukka tandoor liner, maybe next time huh.. i need to get some of that vermiculite or perlite cheapest Ive seen is 15 quid for 100 liters which is not too bad. Thanks UB.

UB,

inspirational stuff this.

i've got the skewer i was thinking of and attached pic of it in my chiminea.

the skewer is 700 lg inc the handle.

i'll get some tikka on marinade this w/e to try and get an idea if this tandoor oven is for me.

feel i need to dig out a previous post by i think Haldi to get more background on the cooking.

can't wait for the rest of your build - i'm totally sold on what i've seen so far - let the civil engineers sneer at the simplicity and ingenuity.