Thanks to my interest in geopolymers having been sparked by members of this forum, I’m off to Davidovit’s geopolymer course and conference in July. So if anyone has any questions or geopolymer ideas they want me to ask then let’s make a list and I’ll see if I can get a few answers. The course promises that I’ll come away with one concrete recipe and one ceramic recipe with a list of suppliers for materials. I’m hoping to also wangle a recipe for high-temperature concrete out of them as well. The course is a bit pricey, but the conference is only about 50 euros so if there’s anyone living in France who fancies going then two heads would be better than one as they say.
I suggest you try to come away with a recipe that meets these requirements: (1) well documented (2) simple (3) cheap (4) made from widely available components (5) consistent components (portland cement is pretty consistent, etc) (6) Tested - able to withstand the tests of time in an RMH/BBR/DSR/etc
I don’t think that any are core high temperature - I still need to check what temperature they are good for but they should be fine for tiling or forming panels around the stoves. French people are lucky in that the suppliers are mostly French i think.
The only problematic component is the SiO2 sand, which is a reconstructive polymorph.
It’s from a company called silmer in France the reason they like to use it is that it reacts on the surface. The main thing is the paste that needs mixing for 10 min before adding anything else. I’ll write up more with a video when I get back. The silicate they recommend has all the alumina species in optimum ratio and is specially formulated as a geopolymer hardener. You can start with the paste and just add whatever else you want. Although only by adding the slag at the end do you get room temp setting.
Today there was a session on phosphate based geopolymer for high temp uses. I’ll post what I understood of this later. But you are probably ahead of the game. I have the recipe and curing method so I’ll stick that up later.
MK-750 has different reactivity based not just on geological source but also calcifying process, as well as the milling process.
High reactivity affects the rheology of the mix. High reactivity can make it much stiffer and harder to mix in aggregates. So selection of reactivity depends on what you are doing with the mix.
Reactivity increases with the expansion of the particle platelets that are stacked like sliced bread. This opening up exposes more surface area to react. It also increases with the reduction of particle size which also increases surface area.
Argical M-1000 made in France, MK40 made in Ukraine are made using a rotary kiln. They are not so reactive.
Metastar is made in the USA. It is produced using the Herreshoff kiln. They are most reactive. Pozzolanic index of 1400.
Argical M-1200S is made using a flash kiln in France. It has a pozzolanic index of 1370 and a less open structure.
TexasGonzo: Sooooo glad I found this site! Its always rewarding to find such a super group of folks! To any and all, feel free to PM me anytime. Thanks for having me!
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.
Mar 26, 2019 8:19:28 GMT -8
michaelegan: i am unable to open the sketchup files on my mac. I used sketchup a few years back but apparently the company now requires a subscription. does anyone have any advice/instructions on how to use the program or how to view pictures without spending money?
Aug 20, 2019 18:41:48 GMT -8
mannytheseacow: michaelegan: download AutoCAD student version for free... import .SKP
Aug 23, 2019 13:33:44 GMT -8
topbaza: hi everyone, been searching all over net and this is were i need to be i think!!
Sept 28, 2019 6:16:25 GMT -8
anounaki: Hi, why I cant upload photos when I make new tread to this forum?
Feb 28, 2020 2:09:40 GMT -8
ahansen: photos under 1 mb not possible?
Jun 4, 2020 0:09:21 GMT -8
belgiangulch: Photo's are possible. They must be downloaded elsewhere and the image url (adress) is copyied.
Sept 14, 2020 7:26:15 GMT -8
belgiangulch: While creating a thread click on the small picture in the banner above the reply. A box pops up, paste the image url in the box. Pay no attention to the huge list of numbers and such.When you finish and hit reply your post with pictures will come up.
Sept 14, 2020 7:29:27 GMT -8
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?
Oct 21, 2020 6:53:59 GMT -8
BenAlexanderT: Happy new year everybody. I wish you the best
Dec 31, 2020 15:06:14 GMT -8
Solomon: Anybody in Southern Oregon, in Jackson or Josephine counties?
Jan 16, 2021 21:54:43 GMT -8
gnomedome: i realsie this is from 2009
Apr 14, 2021 8:30:44 GMT -8
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 email@example.com..... the photos in this post did not show up
Apr 14, 2021 8:32:00 GMT -8