Casting is not the only way to form something with liquid, that will harden in one way or another and by far not the simplest or most powerful.
Layering as in the ceramic shell technique or laminating does not require one to be a master craftsman, to form something that is hard to achive in other ways or even impossible. Make something hard, strong and wear resistant at the outside with an overall low weight. Something that likely will remain whole if one let it drop on a concrete floor.
By employing layering or laminating one can get rid of most of the problems one may encaunter with casting.
Requirements: Cardboard, glue and something to protect it against water. Scissor or box cutter. Brushes, laminate roller etc.
May be handy: Vacuum cleaner and a plastic bag to squeeze something from the outside against a form.
Aside of geopolymer binder use aggregate and/or inorganic or organic gauze, mesh weave and strand mats.
Karl, I think you have given me a way to make a pretty good riser. Geopolymer "resin" to laminate 1/2" thick ceramic fiber blanket around a plywood octagon "cylinder" covered with wax paper (2 layers) to allow removal of the form. 4 layers and coat the outside & it should be pretty darn good might even "spiral" wrap the outer layer with paper tape to compress the whole thing. Effectively creating 5 concentric Geopolymer cylinders separated by ceramic wool.
Last Edit: Dec 14, 2016 21:24:23 GMT -8 by jliebler: added more
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Mar 11, 2019 18:56:41 GMT -8
jlmtech: GADGET: CONSIDER USING A JET PUMP INSTEAD OF A BLOWER FAN TO INDUCE DRAFT; NO CLOGGING.
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mannytheseacow: michaelegan: download AutoCAD student version for free... import .SKP
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deadstarsstillburn: Hi there. I was directed this way by folks on the Permies.com website and am hoping I can get some information on how a total newbie can get started designing, siting, building, and not-dying-in-a-horrible-house-fire with a new RMH in a 160-year old home
Oct 21, 2020 6:52:10 GMT -8
deadstarsstillburn: The people over there recommended either a 6" batchbox or an 8" J-tube. I don't know what those are but am going to try to figure that out. What I need is a blueprint that I can scale to fit the need for my house. I have something likne 5000 square feet
Oct 21, 2020 6:53:00 GMT -8
deadstarsstillburn: but I do not need to heat all of it by any means. probably only need to heat half of that, maybe less.
Oct 21, 2020 6:53:15 GMT -8
deadstarsstillburn: moreover, the house has 3 storeys (large attic) so I assume if I get very efficient heating on the ground floor, that will go a long way toward heating the upstairs as well, no?
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Solomon: Anybody in Southern Oregon, in Jackson or Josephine counties?
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gnomedome: i realsie this is from 2009
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gnomedome: i realize this is from 2009 id love to see the photos from this ..as im looking to build a sauna soon similar to this .... if anyody sees this post firstname.lastname@example.org..... the photos in this post did not show up
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