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Casting
Apr 27, 2020 19:20:58 GMT
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Post by paul1975 on Apr 27, 2020 19:20:58 GMT
Hi all. Well I seem to have got the bug now to follow in your footsteps and try and build my own pizza oven. Having watched A few videos, the one I seem to have followed is where you use an exercise ball to create the dome. My question is what can I use as the initial layer to go over the ball to create the shape. I have read about using the refactory cement and Vermiculite. I have also lookEd as using castable refractory cement.
Please can you advise which is better. The cement I was looking at was the ciment fondue Thanks in advance Paul
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Post by downunderdave on Apr 28, 2020 19:47:17 GMT
Hi all. Well I seem to have got the bug now to follow in your footsteps and try and build my own pizza oven. Having watched A few videos, the one I seem to have followed is where you use an exercise ball to create the dome. My question is what can I use as the initial layer to go over the ball to create the shape. I have read about using the refactory cement and Vermiculite. I have also lookEd as using castable refractory cement. Please can you advise which is better. The cement I was looking at was the ciment fondue Thanks in advance Paul I think you should keep researching. Any mix that contains vermiculite or perlite is an insulating mix and will resist storing heat because of its lowered thermal conductivity. In addition because of its light weight it is unable to store much heat because of its low thermal mass. The worst is that it is quite weak resulting in damage from bumps and abrasions. The longevity of ovens with these weak insulating inner domes has not been reported, despite invitations to do so, so I suspect they don’t last too long. You are better off casting a dense inner layer over which you must insulate. Because this results in a far heavier casting, moving it becomes quite difficult. It is far better to skip the ball and build a hemisphere sand castle, over which you can use a dense castable mix, leaving the casting in situ and removing the sand out the door mouth.
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Casting
Apr 29, 2020 16:57:34 GMT
via mobile
Post by paul1975 on Apr 29, 2020 16:57:34 GMT
Hi all. Well I seem to have got the bug now to follow in your footsteps and try and build my own pizza oven. Having watched A few videos, the one I seem to have followed is where you use an exercise ball to create the dome. My question is what can I use as the initial layer to go over the ball to create the shape. I have read about using the refactory cement and Vermiculite. I have also lookEd as using castable refractory cement. Please can you advise which is better. The cement I was looking at was the ciment fondue Thanks in advance Paul I think you should keep researching. Any mix that contains vermiculite or perlite is an insulating mix and will resist storing heat because of its lowered thermal conductivity. In addition because of its light weight it is unable to store much heat because of its low thermal mass. The worst is that it is quite weak resulting in damage from bumps and abrasions. The longevity of ovens with these weak insulating inner domes has not been reported, despite invitations to do so, so I suspect they don’t last too long. You are better off casting a dense inner layer over which you must insulate. Because this results in a far heavier casting, moving it becomes quite difficult. It is far better to skip the ball and build a hemisphere sand castle, over which you can use a dense castable mix, leaving the casting in situ and removing the sand out the door mouth. Thank you for your reply. What would you suggest is best thing to use to create the cast over the (sand castle) as a castable mix. Or any suggestions of sites that might show me. Thanks again Paul
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Post by downunderdave on Apr 29, 2020 21:02:44 GMT
I think you should keep researching. Any mix that contains vermiculite or perlite is an insulating mix and will resist storing heat because of its lowered thermal conductivity. In addition because of its light weight it is unable to store much heat because of its low thermal mass. The worst is that it is quite weak resulting in damage from bumps and abrasions. The longevity of ovens with these weak insulating inner domes has not been reported, despite invitations to do so, so I suspect they don’t last too long. You are better off casting a dense inner layer over which you must insulate. Because this results in a far heavier casting, moving it becomes quite difficult. It is far better to skip the ball and build a hemisphere sand castle, over which you can use a dense castable mix, leaving the casting in situ and removing the sand out the door mouth. Thank you for your reply. What would you suggest is best thing to use to create the cast over the (sand castle) as a castable mix. Or any suggestions of sites that might show me. Thanks again Paul Hi Paul, try searching this site for cast ovens or home-brew cast. Also try community,fornobravo.com There are plenty of well documented builds. Research well before commencing. Good luck, Dave
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Casting
Apr 29, 2020 22:45:28 GMT
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Post by paul1975 on Apr 29, 2020 22:45:28 GMT
Thank you for your reply. What would you suggest is best thing to use to create the cast over the (sand castle) as a castable mix. Or any suggestions of sites that might show me. Thanks again Paul Hi Paul, try searching this site for cast ovens or home-brew cast. Also try community,fornobravo.com There are plenty of well documented builds. Research well before commencing. Good luck, Dave Thanks Dave
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